Constant Volume Conditions Research Articles

Vesicle Budding Induced by the Asymmetric Membrane Insertion of a Surfactant is Limited by an Osmotic Barrier

Due to medical, technical and economical importance, substantial efforts have been made to further understand interactions of surfactants and lipid-bilayers. While approaches such as the well known three-stage-model - describing solubilization of lipid bilayers by surfactants - serve their purpose, complex systems escape its applicability. One such case is where equilibration of surfactant across the bilayer does not occur rapidly after addition from the outside, i.e. surfactant flip does not occur on the observed timescale. In this scenario, stress is induced by non-matching surface area requirements of the inner and outer leaflet. Several mechanisms for the release of this stress have been proposed. 12:0 Lyso-PC and POPC liposomes represent such a system. Here, asymmetry stress stops further lysolipid uptake beyond a certain content and gives rise to originally largely pure lysolipid micelles that equilibrate with the liposomes over days only (“staying out” scenario). However, part of the stress is also relaxed by a limited number of very small exovesicle budding off from the mother vesicle. Here, we present a first quantification of the extent of budding that accompanies “staying out”. This is achieved by separating the budded exovesicles from the mother vesicles using Asymmetric Flow-Field-Flow Fractionation (AF4). We studied the correlation of the extent of budding with osmotic pressure gradients, which affect the sphericity of the liposomes before addition of lysolipid. It suggests that fast budding from liposomes in buffer proceeds under constant entrapped volume conditions and, hence, stops as the mother vesicle becomes spherical. Further budding is slow, probably limited by ion leakage across the membrane. The detailed understanding of the budding processes is valuable both for technical applications and for deeper insight into natural budding-related phenomena such as exo- and endocytosis.

Experimental determination of the dew point pressure for bulk and confined gas mixtures using an isochoric apparatus

A robust high precision experimental approach to determine the Dew Point Pressure (DPP) of the gas condensates in a nano-porous medium is presented in this study. Gas condensate reservoirs have been the center of attention for numerous numerical and experimental studies for decades. Therefore, accurate measurement of DPP is crucial in developing long-term production plans for these reservoirs. This paper presents for the first time a proof of concept for a procedure to study the effect of the pore size distribution on the degree and direction of the shift in the saturation pressure of hydrocarbon gas mixtures under confinement over a relevant range of pressures and temperatures.Isochoric method, an indirect high-precision way of phase transition point determination, is commonly used in other disciplines where a clear non-visual determination of phase transition of a fixed volume of fluid is needed. This study provides an insight into using this approach for determining DPP of gas mixtures inside and outside of the porous media. A semi-automated apparatus for measuring and monitoring equilibrium conditions along with fluid properties is designed based on the isochoric method. The apparatus provides constant volume, variable pressure (0–104 bar), and variable temperature (290–410 K) experimental conditions. Pressure and temperature measurements provide a way to detect the phase transition point along the constant-mole-constant-volume line based on the change in the slope of this line at the phase transition point. A packed bed of BaTiO3 nanoparticles, providing a homogenous porous medium with pores of 1–70 nm is used as a representative nano-scale porous medium. The synthesized porous medium is very helpful in uncoupling the effect of pore size from the effect of mineralogy on the observed deviations in behavior, providing a volume more than 1000 times larger than the typical nano channels.The result is a set of isochoric lines for bulk and confined sample, plotted on the mixture's corresponding phase envelope to demonstrate the change in the saturation pressure. Phase envelopes (P-T diagrams) of the same mixture using different equations of state are created and the accuracy of each of these equations of state in providing an estimate of the experimentally detected DPP is discussed. Many attempts in explaining the shift in saturation pressures of the reservoir fluid confined in the narrow pores of unconventional reservoirs compared to those of the bulk can be found in the literature. However, there are some contradictions between the predicted behavior using different mathematical approaches. Experimental data could be substantially helpful in both validating the models and improving the understanding of the fluid behavior in these formations. Contrary to what many published models proposed, our results show that confinement effect shifts the DPP towards higher values compared to the bulk for a fixed temperature in the retrograde region. Capillary condensation is identified as the main source of the deviations observed in the behavior of fluids inside the nanopores. We evaluated some published models, including those based on EoS modifications, by comparing those to the experimental results which provides a quantification of their accuracy in estimating saturation pressure values for the confined mixtures.

Effects of small and large shear histories on multiple liquefaction properties of sand with initial static shear

It has been reported that soils belonging to slope grounds show different types of liquefaction behavior than those belonging to horizontal grounds. Some research has also revealed that liquefaction histories can significantly affect the shear behavior of sandy soils. However, the combined effects of the slope angle and the magnitude of past shear histories on the liquefaction properties of soils have not been studied comprehensively. Based on this background, several multiple liquefaction tests with initial static shear were conducted on Toyoura sand. In each of these tests, a single specimen was sheared several times up to small or large double amplitude shear strain under a constant volume condition using a specially designed stacked-ring shear apparatus. The behavior of the Toyoura sand observed in these tests was discussed considering various perspectives, such as the increase in relative density, the induced anisotropy, the change in liquefaction resistance, and the shear strain accumulation. The findings of this study established that shear histories of smaller magnitude had relatively less influence on densification and induced anisotropy than those of larger magnitude. Moreover, shear histories of smaller magnitude also resulted in the relatively higher liquefaction resistance of sand specimens against the next cyclic shear, while the opposite trend was observed in the case of specimens subjected to shear histories of larger magnitude. Finally, shear strain accumulated less easily in tests with small shear histories than in those with large shear histories.

Emerging Advantages Of Pressure-Assisted And/Or Constant Volume Conditions For Enabling Organ Banking

Emerging Advantages Of Pressure-Assisted And/Or Constant Volume Conditions For Enabling Organ Banking

Effect of synthetic Beishan site water and cement solutions on the mineralogy and microstructure of compacted Gaomiaozi(GMZ) bentonite

The mineral alteration and microstructure evolution of compacted GMZ bentonite was investigated during the long-term in the Beishan area, a candidate for a high-level radioactive waste repository in China. The compacted GMZ bentonite samples at initial dry densities of 1.5 and 1.7 Mg/m3 were infiltrated by synthetic Beishan Site Water (BSW) and two synthetic cement solutions (Young Cement Water -YCW and Evolved Cement Water - ECW) under constant volume conditions for about 2 months in this study. X-Ray diffractometry (XRD), mercury intrusion porosimetry (MIP) and scanning electron microscope (SEM-EDS) tests were carried out to observe the mineralogy and microstructure of the specimens after experiencing the three types of pore solutions.There is evidence of cation exchange reactions, some zeolites and C-S-H in the GMZ bentonite after the infiltration of alkaline solutions. The hydration of alkaline solutions and mineralogy alteration result in changes to the microstructure of compacted GMZ bentonite. The generated secondary mineral on the surface of montmorillonite leads to the clogging of inter-aggregate pores. In the case of high dry density, this resulted in pore occlusion.

Development of an optically accessible apparatus to characterize the evolution of spherically expanding flames under constant volume conditions

Flame speed is extremely important as it affects the performances of many industrial systems. Moreover, its significance makes it a major target for the validation of kinetic mechanisms, which explains the necessity to provide ever more accurate data. Flame speed dependence on pressure and temperature conditions is interestingly assessed using, among others, spherically expanding flame in constant volume chambers. In these conditions, the flame speed derivation, based solely on the pressure evolution in the chamber, requires empirical models. The current study describes a perfectly spherical chamber with full optical access allowing simultaneous recording of the pressure inside the chamber and, fully innovative, of the flame radius evolution until the flame vanishes at wall. A careful description of the new set-up and of the accuracy of the measurements, in particular of the flame radius, is presented here. In parallel with experiments, one-dimensional transient simulations were carried out to identify the limits of the proposed new method. Then, the simultaneous use of pressure and flame radius information is compared to the traditional constant volume method based on empirical models. A first advantage relies in the direct detection of the development of instabilities during the flame propagation. In addition, although the flame speed is extremely sensitive to the flame radius determination, the actual experimental accuracy allows significant improvements in terms of accuracy, notably as initial pressure and temperature are elevated. This new set-up will allow major advances in the measurement of laminar flame velocity under extreme thermodynamic conditions.

Impact of shale matrix mechanical interactions on gas transport during production

Shale gas has played an increasingly important role in world energy supply in recent years. The gas transport process in the shale matrix is particularly important as it affects the long-term production behavior of shale gas. The shale matrix consists of inorganic minerals and embedded organic matter with mass transfer influenced by mechanical interactions. We develop a micro-scale discrete coupled model to explicitly account for mass transfer and mechanical interactions, and how these interactions affect the gas transport characteristics of both components. Specifically, the model comprises organic matter embedded within inorganic minerals. The proposed model is implemented and solved within the framework of COMSOL Multiphysics (Version 5.4). The model is first verified against the results of a desorption-diffusion-seepage coupled experiment and then extended to field scale. It is found that the impacts of gas pressure and effective strain are different for the gas seepage in inorganic minerals and gas diffusion in organic matter. Gas pressure may enhance the permeability of the inorganic phase due to the gas slippage effect while compactive effective strain decreases permeability during the gas depletion process. For gas diffusion in the organic matter, surface diffusion decreases and effective diffusion coefficient increases with declining gas pressure. While the impacts of effective strain on the effective diffusion are dependent on the external boundary conditions, the effective diffusion coefficient is lower than the initial value under constant stress conditions and larger than the initial value under constant volume conditions. The proposed model provides a complementary method to conventional continuum dual-media approaches and provides a clear understanding of the interactions between the two components. Field-observed oscillatory gas production data is readily history-matched and key mechanisms explained with the proposed approach presented in this work.

Effect of prolonged drying at high temperature on the water retention capacity of bentonite (FEBEX-DP samples)

The FEBEX (Full-scale Engineered Barrier Experiment) in situ test simulated the engineered barrier of a nuclear waste repository and was in operation for 18 years under natural conditions, with a heater simulating the waste container. The water retention curves of bentonite samples retrieved during dismantling of the in situ test (FEBEX-DP samples) were determined in the laboratory with the vapour transfer technique, following wetting paths under isochoric conditions. The water retention curve relates suction (or relative humidity) to bentonite water content. The aim of the tests was to check the effect of prolonged and intense drying on the water retention capacity of the bentonite. To accomplish this, samples from the drier blocks in the barrier –those closest to the heater, whose surface temperature was 100 °C– and from the core of the barrier in cool areas were analysed.For suctions above 10 MPa, the water retention curves determined in the laboratory were affected by the water content of the samples retrieved: samples with higher initial water content tended to reach higher water contents for a given suction. However, the samples that had been taken from locations closest to the heater, which had the lowest initial water contents, reached higher water contents for the lowest suctions (<10 MPa) than the rest of the samples, which attest that the water adsorption capacity was not lost as a result of prolonged drying.The comparison of the water retention curves obtained for the retrieved samples with those for the FEBEX reference bentonite, compacted at similar densities, shows that there were no changes in the water retention capacity as a result of operation, and that the water adsorption capacity of the bentonite under constant volume conditions is mostly conditioned by dry density, irrespective of the previous hydraulic history.

Molecular scale modeling approach to evaluate stability and dissociation of methane and carbon dioxide hydrates

A comprehensive knowledge and precise estimation of the dynamic, structural, and thermodynamic characteristics of hydrates are needed to assess the stability of gas hydrates. Thermodynamic model and experimental studies can be utilized to compute the physical and dynamic properties of hydrate structures. The use of molecular dynamic (MD) simulation is a well-established approach in gas hydrate studies at the atomic level where the properties of interest are obtained from the numerical solution of Newtonian equations. The present work uses MD simulations by employing the constant temperature-constant pressure (NPT), constant temperature-constant volume (NVT) conditions, and the consistent valence force field (CVFF) to monitor the stability and decomposition of methane and carbon dioxide gas hydrates with different compositions. The effects of temperature and composition on the hydrate stability are investigated. In this study, we also compute the radial distribution function, mean square displacement, diffusion coefficient, lattice parameter, potential energy, dissociation enthalpy as well as the density of methane and carbon dioxide under various thermodynamic and process conditions. The formation of methane and carbon dioxide bubbles is studied to investigate bubble evolution during hydrate dissociation. The sizes of methane and carbon dioxide bubbles are not the same due to different solubility conditions of methane and carbon dioxide in liquid water. In addition, the influences of pressure and temperature on the lattice parameter and density of clathrate hydrates are discussed. The obtained results are consistent with previous theoretical and experimental findings, implying that the methodology followed in this work is reliable. The most stable arrangement of methane and carbon dioxide molecules in the gas hydrate is found. The insights/findings of this study might be useful to further understand detailed transport phenomena (e.g., molecular interactions, gas production rate, carbon dioxide replacement, and carbon dioxide capture) involved in the process of carbon dioxide injection into gas hydrate reservoirs.

Finite element model of measurement of intraocular pressure by the Schiøtz tonometer

The finite element model describing the change of the stress-strain state of the sclera (the outer shell of an eye) loaded by an impression-type tonometer – the Schiøtz tonometer is presented. The simulation is performed with the software package ANSYS, Inc. The elastic system cornea–sclera is modeled as two thin transversely isotropic adjoint spherical shells with different radii of curvature and biomechanical properties loaded by the internal pressure and two loads with concave bases (footplate and plunger). The effect of the weight of the plunger and the thickness of the cornea on the tonometric pressure readings obtained due to the standard method of data processing for Schiøtz tonometry is studied. The obtained values are compared with the values found from the condition of constant internal volume of the deformed composite shell.

Shape Optimization of a Column under Generalized Load with a Force Directed towards Positive Pole

Abstract In this paper, the issue of shape optimization of a column subjected to the generalized load with a force directed towards the positive pole (L. Tomski’s load, specific load) was considered. Based on the Hamilton’s principle, the differential equations of movement and boundary conditions describing the system were formulated. Taking into account a kinetic criterion of stability loss and a condition of constant total volume, the scope of changes in natural frequency as a function of an external load was determined with selected geometrical and physical parameters of the loading structure. On the basis of obtained results, values of geometrical parameters of individual column segments were determined, at which the maximum critical load value was obtained. In order to find the maximum critical force, which is a function of many variables, the simulated annealing algorithm was used.

Molecular dynamic simulations to evaluate dissociation of hydrate structure II in the presence of inhibitors: A mechanistic study

The present work aims to investigate stability and decomposition of hydrate structure II of methane, propane, and isobutane systems at various temperatures, pressures, and compositions in the absence and/or presence of inhibitor molecules. To assess the stability of gas hydrates, a comprehensive knowledge of the structural, thermodynamic, and dynamic properties of the hydrates is needed. The structure II of gas hydrates is embedded in a molecular dynamic (MD) approach and the simulations are carried out under constant temperature-constant volume (NVT) and constant temperature-constant pressure (NPT) conditions by employing the consistent valence force field (CVFF). In this work, first, the mean square displacement (MSD) and diffusion coefficient are evaluated to demonstrate the movement of host molecules. The radial displacement function is then utilized to display the characteristic configurations of structure II under different process and thermodynamic conditions. In addition, other vital properties including lattice parameter and potential energy are determined. The effect of inhibitors on stability and/or decomposition of hydrate structure II is investigated. The achieved results are in good agreement with previous theoretical and experimental outputs, confirming reliability and appropriateness of the simulation method. The inhibition capability of different inhibitors based on the simulation results has the following order: methanol > ethanol > glycerol. The findings of this study can help for better understanding of hydrate dissociation in molecular scale as well as for proper selection and design of effective inhibitors for hydrates with different structures and characteristics.

Effect of aging on thermal conductivity of compacted bentonites

The thermal conductivity of compacted bentonite is one of the most crucial parameters for the safe operation of high-level radioactive waste (HLW) repositories where bentonite can act as a feasible buffer. In this study, the potential effects of aging on the thermal conductivity of Gaomiaozi (GMZ07) and Wyoming (MX80) bentonites were investigated experimentally. The bentonite specimens were prepared under different conditions, such as varying water content and dry density, through the static compaction method in a special mould. The water content of the compacted bentonite specimens was kept constant during curing periods of 0, 5, 15, 30, 60, and 100 d under constant volume conditions, and the thermal conductivity of the two bentonites was then measured using the thermal probe method. The test results showed that the thermal conductivity decreased with increasing aging time for both of the compacted bentonites, with a trend that decreased significantly at the early aging periods and then tended to be constant when the aging time exceeded 60 d. The effects of aging are more pronounced for specimens with higher dry densities and water contents. Mercury intrusion porosimetry (MIP) test results confirmed that the reduction in thermal conductivity with aging time could be attributed to smectite hydration within the bentonites during the aging process. With this hydration, part of the soil water moves into the interlayer spaces of smectite crystals, resulting in a decrease in the pore water outside the bentonite particles, which decreases the thermal conductivity of the bentonites.

Experimental study of shear-key equipped pile to grout connection under cyclic loading

A technical solution for tidal turbine foundation in granite seabed consists of grouted steel piles. The piles would be subjected to cyclic loading due to the severe service conditions. The mechanical behaviour at the interface between the pile and the surrounding media is one of the key points that determine the bearing capacity of the foundation system. Experimental research work has been carried out in the laboratory to study the grouted pile-to-rock connection (GPRC) and focused more precisely on the pile to grout connection when the pile is equipped with shear-keys that enhance the interface capacity. Monotonic and cyclic shear tests were performed using a specific direct shear test device (BCR3D), allowing application of sample confining conditions close to the in-situ conditions, namely constant normal stiffness conditions. Cyclic tests - either under one way or two-way shear loading application - were performed on several samples, under both constant volume and various constant stiffness boundary conditions. This study has shown that the strength of the interface is highly dependent on the combination of mean load, cyclic amplitudes and number of cycles applied to the interface. Cyclic failure was observed with less than 30 cycles for two-way and one-way cyclic loading.

Geological implication of grain-size segregation in dense granular matter.

To the current common belief, grain size segregation in granular matter requires sufficient porosity. Therefore, grain size segregation found in a natural fault gouge could imply elevated fluid pressure and the reduced normal stress on fault, possibly caused by the frictional heat during an earthquake. To clarify whether fluidization is essential to grain size segregation, we conduct numerical simulation on a simple model of fault gouge in a plane shear geometry under constant volume condition: the volume fraction is fixed at 0.6, at which the granular system possesses yield stress. We observe apparent grain size segregation at this volume fraction, meaning that grain size segregation alone does not imply fluidization of granular matter. We also show that segregation is driven by the nonlinear velocity profile, and that the gravity is not essential to segregation. The physical condition tested here may be relevant to earthquake faults: the normal stress of 1 MPa, the sliding velocity of 1 m s−1, and the duration of 0.1 s.This article is part of the theme issue ‘Statistical physics of fracture and earthquakes’.

Characterization of water retention, compressibility and swelling properties of a pellet/powder bentonite mixture

The water retention, compressibility and swelling properties of a pellet/powder bentonite mixture were investigated in the laboratory. The water retention capacity was determined under constant-volume condition using a specially designed cell allowing vapor exchange in all directions; suction controlled oedometer tests were carried out for the compressibility investigation; both constant-volume and swell-consolidation methods were applied for the swelling pressure determination. The vapor equilibrium technique was used for suction control. Comparable results were found for the water retention capacity of the pellet/powder mixture determined under constant-volume condition and one single pellet under free swelling condition for suctions higher than 4 MPa, suggesting that the suction was mainly controlled by the micro-pores inside the pellets/powder grains and the swelling of the clay particles was accommodated by the existing macro-pores. On the contrary, at lower suctions, the constant-volume conditions gave rise to a lower water retention capacity for the mixture, indicating the restricted clay particle swelling after the filling-up of the existing macro-pores. Oedometer compression curves revealed a different behavior for low and high suctions: at high suctions, the volume change behavior was governed by the pellets rearrangement combined with possible pellets crushing upon loading. By contrast, at low suctions, the mixture lost its initial granular structure during suction decrease; thus, the volume change behavior became similar to that of compacted bentonite. Compared to compacted bentonite, the pellet/powder mixture showed a lower yield stress. A lower value of swelling pressure was found with the constant-volume method, confirming the limitation of the swell-consolidation method in determining soil swelling pressure.

Target-Oriented Fuel Design for the Homogeneous Charge Autoignition Combustion Mode: A Case Study of a n-Heptane–PODE3–Ethanol Mixture. 1. A Pathway To Increase the Combustion Efficiency and Reduce Pollutant Emissions

This work offers a pathway to increase the combustion efficiency and reduce the pollutant emissions for the homogeneous charge autoignition (HCAI) mode of combustion. The combustion and emission characteristics of n-heptane–PODE3–ethanol mixtures were measured under constant volume conditions at a pressure of 2.703 MPa and equivalence ratio of 0.4–1.0. The fuel reactivity was varied by changing the blending ratio of high cetane number fuel and high octane number fuel. The main results are summarized below: First, the fuel reactivity should be adjusted according to the equivalence ratio to improve the combustion load adaptability. At fuel-lean conditions, the proportion of high cetane number fuel should increase to strengthen the ignition and combustion stability. As the load approaches the stoichiometric condition, the proportion of the high octane number fuel should increase to form a homogeneous charge to elevate the combustion efficiency. Pure n-heptane achieves the maximal combustion efficiency up to ...

SOLID CaCO3 FORMATION IN WATERS OF CIRCULATING COOLING SYSTEMS OF POWER PLANTS UNDER THE CONDITIONS OF ELECTRIC LOAD CHANGE

The rate of solid calcium carbonate (Dve) formation in circulating water (CW) of circulating cooling systems (CCS) of power plants with cooler towers and the stability index of such water at changing electric load is analyzed. The relationship between streams of CCS, namely, feeding, evaporation and blow, which exist under the condition of constant CCS water volume and dependence of evaporation flow upon units load are the basis of analysis. Such dependence is based on the fact that the main channel of heat dissipation after steam turbine units is evaporation in cooling towers. The general expression has been obtained in quasiequilibrium approximation that establishes the relation between Dve and CW stability index. This dependence allows calculating CW stability degree for any models of CaCO 3 formation kinetics and to obtain corresponding Dve value. It has been shown that the rate of solid CaCO 3 formation is directly proportional to electrical load of power plant, Ca 2+ ion concentration in feed water and fraction of used heat dissipated by evaporation, antiproportional to stability index, inverse to CCS water volume and the average efficiency of power plant.

Surrogate formulation methodology for biodiesel based on chemical deconstruction in consideration of molecular structure and engine combustion factors

.Abstract A novel methodology based on chemical deconstruction for the formulation of surrogate fuels for biodiesels was proposed, developed, and validated. Surrogates were formulated using sub-surrogates of methyl palmitate, stearate, oleate, linoleate, and linolenate, which are the major components of biodiesel. Each methyl ester sub-surrogate was constituted by a binary or ternary fuel mixture. To formulate the sub-surrogates, key physical and chemical parameters based on engine spray and combustion were considered with preferential weight functions. To calculate the optimal surrogates, novel weighted Euclidean distance and analytic hierarchy process algorithms were used to accurately determine the components and their proportions. Next, surrogates for biodiesels were assembled from the sub-surrogates according to the component ratios of the target fuels. Using this methodology, surrogates for biodiesels could be formulated regardless of feedstock origin and production region. For example, the surrogate fuel for soybean biodiesel consisted of 62.9% methyl decanoate, 15.0% n-hexadecane, 9.4% methyl trans-3-hexenoate, and 12.7% 1, 4-hexadiene in mole fractions. The process of experimental validation was divided into two steps: first, verifying the sub-surrogates for methyl palmitate, methyl oleate, and methyl linoleate; and second, comparing the quaternary surrogates with real soybean biodiesel. Point-to-point experiments were conducted on three platforms: a heated rapid compression machine, a laminar flow reactor, and an ignition quality tester. More specifically, the rapid compression machine experiments compared the autoignition characteristics, especially the low-temperature reactivity, of the surrogates and the target fuels under constant-volume adiabatic conditions. Laminar flow reactor was used to compare the low-to-intermediate oxidation properties of the surrogates with those of the target fuels, especially the early formation of olefins and carbon dioxide, which is a key characteristic of the combustion of biodiesel. Ignition quality tester was used to ensure that the surrogates had similar ignition and combustion delay times under engine-like conditions. The results of all of these experimental validations showed that the ignition and oxidation properties of the surrogates were consistent with those of their target fuels. In addition, a kinetic model of the quaternary surrogates was proposed and further validated in a laminar flow reactor. In sum, quaternary surrogate fuels were developed using a method based on chemical deconstruction, which was shown through validation experiments to be highly accurately and reliably reproduce the combustion properties of soybean biodiesel. Furthermore, chemical deconstruction method has great potential in surrogate modeling for various biodiesels.

Structural relaxation of porous glasses due to internal stresses and deformation under tensile loading at constant pressure

The time evolution of the pore size distributions and mechanical properties of amorphous solids at constant pressure are studied using molecular dynamics simulations. The porous glasses were initially prepared at constant volume conditions via a rapid thermal quench from the liquid to the glassy state and allowing for simultaneous phase separation and material solidification. We found that at constant pressure and low temperature, the porous network becomes more compact and the glassy systems relocate to progressively lower levels of the potential energy. Although the elastic modulus and the average glass density both increase with the waiting time, their dependence is described by the power-law function with the same exponent. Moreover, the results of numerical simulations demonstrated that, under tensile loading at constant pressure, low-density porous samples become significantly deformed and break up into separate domains at high strain, while dense glasses form a nearly homogeneous solid material.