Dynamic Core Research Articles

Stability and Analysis of Vibrations Bifurcation Based on Dynamic Modeling of a Solar Titan 130 Gas Turbine

Abstract This work is interested in studying the vibrations’ stability in gas turbines, compared to a dynamic model of the Jeffcott rotor, the parameters of the gas turbine will be estimated for the purpose of developing a mathematical model which points out the behavior of the turbine rotor in virtue of the data of actual vibration measurements. The addition of the geometric nonlinearities of the vibrations unveils a supercritical Hopf bifurcation, the unstable modes are repulsed towards a stable limit cycle of small radius. The vibration measurements and analyzes were performed on a gas turbine Solar TITAN 130 type mounted in a gas compression station in Djelfa, Algeria. The turbine was in the operating mode when the vibration parameters were read. Bifurcation monitoring bounds the specific operating ranges, extracts efficiently the dynamic behavior core of the studied turbine and consequently affords a new approach to efficiently dimension the turbine rotor.

NUMERICAL SOLUTION FOR THE DISTRIBUTION OF THE ELECTROMAGNETIC AND THERMAL FIELDS OF AN AIR-CORE TRANSFORMER

The article presents a numerical solution for the distribution of the electromagnetic and thermal fi elds of an air-core transformer using the fi nite element method. The distribution of the magnetic fi eld is determined for the dynamic steady state and magnetic nonlinear core characteristics. The model presented facilitates the establishment of criteria for optimizing transformer operation under various load conditions, environments as well as in the case of failures. Thus, the transformer can operate at maximum capacity while, at the same time, the probability of faults due to overheating is reduced to a minimum.

Establishment and Analysis of the Relationship Model between Macro-Texture and Skid Resistance Performance of Asphalt Pavement

Pavement surface texture evaluation is mainly analyzed based on elevation data in previous research, and attention also need to be paid to wavelength information. Furthermore, a well-established relationship model between surface texture and skid resistance for real road sections still needs further investigation to help provide useful information on appropriate maintenance time considering skid resistance attenuation. In this research, the macro-texture of asphalt pavement was evaluated from different aspects, including elevation, wavelength information, and geometry, and the relationship models between the macro-texture and skid resistance (at both low and high speeds) were established and compared using the multiple linear regression (MLR) and back propagation (BP) neural network to recommend a suitable one. In order to achieve this, this study monitored anti-skidding performance and the macro-texture of six road sections for 18 months. Firstly, the Dynamic Friction Coefficient (DFC) test and core drilling were conducted on site at three different service times. Additionally, a laboratory accelerated loading test was carried out on specimens prepared by similar material composition to one of the road sections, and the British Pendulum Number (BPN) was tested after different passes of loading. Secondly, 3D laser scanning was carried out on core samples from road sections and laboratory specimens after different passes of loading. The correlation degree between macro-texture indexes and anti-skidding performance was analyzed with the grey correlation entropy analysis method. Finally, the relationship models between the anti-skidding performance at high and low speeds and macro-texture were established based on the MLR and BP neural network. The results indicate that the macro-texture indexes calculated based on elevation data to characterize vertical irregularities have a good correlation with the skid resistance despite the different service times and pavement types. Compared with the BP neural network model, the MLR model has low correlation and noticeable error. The relationship model between F60 (DFC at the speed of 60 km/h) and macro-texture could be well established by the BP neural network. In addition, the relationship between F20, BPN, and pavement surface macro-texture is poor, making it impossible to establish a model with good correlation. Generally, it is recommended to use the BP neural network to establish the relationship model between macro-texture and skid resistance.

Conservative Physiotherapy Treatment of Femoroacetabular Impingement

Abstract The femoro-acetabular impingement (FAI) syndrome is a motion-related disorder of the hip joint with premature contact between the acetabulum and the proximal femur. It is a relatively new clinical entity and no strict treatment protocols and guidelines have been established yet. Furthermore, patients are often misdiagnosed and not properly treated. We report a clinical case of a young adult female patient presenting with a bilateral FAI-CAM type deformity during the last 2 years. An individual progressive global elastic resistant training program was established which involved stimulation to all affected muscle groups using Pilates concept. Hip-specific and functional lower limb strengthening targeted the deep hip external rotators, abductors and flexors in the transverse, frontal, and sagittal planes. Improving the dynamic stability and Core stability was the main aim of the challenging physiotherapy treatment in this case. A good functional result was registered at 6 months follow up. All therapeutic activities were performed in a pain free range of motion which was of paramount importance for achieving excellent patient compliance and successful outcome respectively. The applied treatment strategy demonstrated to be reliable and could be a helpful tool in the armamentarium of contemporary physiotherapy when dealing with the FAI group of patients.

Dynamic fluid-structure interaction of graded foam core sandwich plates to underwater blast

• Performing fluid-structure interaction analysis on fully clamped graded foam core sandwich. • Introducing cavitation evolution under the planar underwater impulsive loading. • Showing nonuniformed distribution of the cavitated bubbles during its extension and collapse. • Proposing the determining factors of cavitation evolution for the graded sandwich. • Showing superiority of the core gradient design for eliminating cavitation. The aim of this paper is to address characteristics of cavitation evolution caused by the one-dimensional fluid-structure interaction as the graded foam core sandwich panels are subjected to underwater impulsive loadings. A transparent underwater shock tube is adopted to generate controllable and planar blast impulses exerted on the fully clamped sandwich panels. The effects of the impulsive intensity, core strength, core density gradient, and boundary condition are carried out to examine the cavitation evolution during the dynamic fluid-structure interaction. The results show that the initiation, extension, and collapse of the cavitation are significantly determined by the propagations of the breaking front and the closing front, which have different correlations with the considering effects. Due to the dynamic core compression and unloading, the distinct elevating speed of the closing front is firstly found in the fluid-structure interaction under the impulsive loadings. During the cavitation evolution, the non-uniformed distribution of the cavitated bubbles indicates that the cavitation region closer to the fluid-solid interface experiences more considerable pressure drops. The dynamic response of the weakest layer of the core shows predominant influences on the propagation trajectories of wave fronts and reducing of the cavitation ratio, indicating that the core gradient design can efficiently decrease the transmitted impulse and has superiority to the uniform cores with the identical areal mass.

Rock characterization integrating free-free resonant column measurements and X-ray computed tomography imaging

This study addresses the innovative integration of free-free resonant column measurements (FFRC) of body wave velocities in rock specimens with the X-ray microcomputer tomography (micro-CT or μ-CT) imaging. FFRC seismic measurements combined with μ-CT scanning is a novelty manner to execute and interpret dynamic rock core characterization in laboratory. FFRC measurements covers unconstrained compression and shear wave velocities (Vc and Vs) as well as quality factors (Qc and Qs), which were evaluated in the ranges of frequency from ~ 3 to ~ 10 kHz for Berea sandstone specimens and from ~ 10 to ~ 20 kHz for Indiana limestone samples. In addition, the propagation velocity of constrained compression waves, Vp, were measured for all the specimens using direct-travel times. The μ-CT scanning provided micro-structural rock parameters such as porosity, profiles of coefficients of attenuation, as well as pore-size and grain-size distributions. Also, resonance testing allowed us to evaluate the integrity of the rock cores, which could be independently confirmed by using μ-CT scanning along the specimens. Finally, FFRC combined with μ-CT might provide quantitative information to clarify atypical seismic results of rock cores.

The effects of clinical pilates training on disease-specific indices, core stability, and balance in patients with ankylosing spondylitis

ObjectiveTo assess the effects of clinical Pilates training on disease-specific indices, core stability, and balance in ankylosing spondylitis (AS) patients. MethodsAS patients were randomly assigned to either the Pilates group (PG) or control group (CG). The PG participated in Pilates training 3 times a week for 8 weeks. Patients in the CG were instructed to follow a home exercise program for 8 weeks. Assessments were performed before and after the interventions. BASDAI, BASFI, BASMI, and the AS Quality of Life (ASqOL) questionnaire were used were used to evaluate disease activity, functionality spinal mobility and quality of life respectively. Static core endurance was assessed with trunk flexor, extensor endurance, and lateral bridge tests, while dynamic core endurance was assessed using modified sit-up test. Balance was evaluated with bilateral and unilateral stance static postural stability (PS), bilateral stance dynamic PS and limits of stability (LOS) tests using the Biodex Balance System. ResultsTwenty-one patients in the PG and 21 patients in the CG completed the study. PG showed statistically significant improvements in BASDAI, BASFI, BASMI, and ASQoL scores, all core endurance tests, and dynamic PS and LOS results. The CG demonstrated significant improvement only in flexor endurance and LOS results. Post-intervention BASDAI, BASMI, and all core endurance tests were significantly better in the PG than in the CG (p < 0.05). ConclusionPilates training has positive effects on disease activity and functional capacity, spinal mobility, core endurance, balance, and quality of life in AS patients. Clinicaltrials.gov identifierNCT04292028.

Anionic surfactant with enhanced interfacial wettability control capability for residual oil development

Oil-solid interfacial wettability control is a new breakthrough point for achieving effective peeling off of the residual oil film. Modifying rock surface to strongly hydrophilic state would greatly enhance the oil film peeling efficiency. However, traditional anionic surfactant can only convert the oil-wet rock surface to neutral or slightly hydrophilic. Developing novel surfactant with enhanced interfacial wettability control capability would be of great significance for the residual oil development. In this paper, a novel anionic surfactant sodium dihydroxymethyl dodecyl sulfate (SDDS) was synthesized by a simple one-step grafting of hydroxyl groups onto sodium dodecyl sulfate (SDS). By adding hydroxyl groups, SDDS could achieve enhanced adsorption to the oil-wet rock surface and the exposed head groups exhibited improved hydrophilicity, resulting in the excellent surface wettability modification capability. The oil-wet rock surface can be modified to strongly-hydrophilic and oleophobic state, with the underwater oil contact angle increasing significantly from 20.3° to 157.1°, which is superior than most of the reported surfactants. SDDS could peel off about 98 % of the oil film within 6 h under simulated reservoir conditions. The dynamic core displacement results also showed that at a concentration of 300 ppm, SDDS could enhance the oil recovery ratio by 18.24 % compared with the simulated water flooding, demonstrating great potential in the efficient development of residual oil.

Influence of Sandstone Mineralogy on the Adsorption of Polar Crude Oil Components and Its Effect on Wettability

The crude oil–brine–rock (COBR) system is a combination of contacting phases where polar organic molecules in crude oil, inorganic ions from the brine phase, and charged mineral surfaces participate in complex interactions. One of the surface phenomena that occur in the COBR system is the adsorption of polar crude oil components, which can directly affect the capillary forces and wettability of the rock. The purpose of this research work was to determine polar organic component (POC) adsorption trends for sandstones of different origins and mineralogical compositions. Adsorption preferences for acidic and basic POCs were quantified by potentiometric titration during dynamic core flooding tests using modified crude oil. The influence of POC adsorption on wettability was investigated by evaluating capillary forces during the displacement of oil in a spontaneous imbibition (SI) process. The results of this work showed a clear relationship between the intensity of POC adsorption and sandstone mineralogy. Greater adsorption capacity and a predominant affinity for bases compared to that for acids were found in the sandstone material containing a sufficient amount of reactive illite clay minerals. On the other hand, the sandstone material consisting mainly of quartz with an insignificant content of kaolinite clay did not show a pronounced tendency to adsorb POCs. All the studied rock materials have also shown a significant impact of POC adsorption on capillary forces and wettability, confirmed during SI tests. As a result, a detailed mineralogical analysis along with crude oil chemistry is required to properly evaluate sandstone wettability and competently plan core flooding laboratory studies.

Immediate effect of induced muscular fatigue on static and dynamic balance and core strength in male volleyball players

Introduction: Muscular fatigue causes impaired joint proprioception and postural control which can affect performance. Fatigue affects the capacity of the muscle to generate force which ultimately leads to injuries and diminish performance. The effect of fatigue on static and dynamic balance in volleyball players was inadequately known. Aim: To assess the effects of induced muscular fatigue on static and dynamic balance and core strength in volleyball players. Methodology: Twenty male volleyball players were included in the study according to inclusion criteria. Dynamic balance by functional reach test, static balance by single leg stance and strength of core were evaluated before and after inducing the fatigue. Fatigue was induced by asking the participant to perform the squats till RPE of 10. Results: On data analysis using paired t test, a marked decrease in the single leg stance time mean from 26.63 seconds before fatigue to 22.55 seconds after inducing fatigue (p&lt;0.05) was observed. A reduction in the functional reach distance covered by subjects from 31.8cms before fatigue to 29.33cms after inducing fatigue (p&lt;0.05) was observed. A decrease in the core muscle strength from 42.25 mm Hg before fatigue to 41.85 mmHg after fatigue (p&lt;0.05) was observed.

Wettability-Based Retention of Encapsulated Petroleum Sulfonate in Carbonate Rocks at High-Temperature and High-Salinity Conditions

Understanding retention of chemicals onto the rock surface with varying wettabilities allows for better understanding of behavior and performance of the chemicals for applications in oil-bearing rocks. This work studied dynamic retention properties of the low-cost encapsulated petroleum sulfonate nanofluid–Nano-Surfactant (NS)–to the Indiana limestone outcrop surfaces at various wettabilities and surface chemistry while under high-temperature and high-salinity (HTHS) reservoir conditions. Different wettabilities and surface chemistry of the Indiana limestone outcrops were achieved through chemical functionalization utilizing silane coupling agents (4-phenylbutyltrimethoxysilane, n-decyltrimethoxysilane, and 9-phenanthrenyltriethoxysilane), and the NS transport in those core plugs was studied via dynamic core flooding. Incorporating 4-phenylbutyl and n-decyl functional groups onto mineral surfaces made the porous media less water-wet but did not change the transport performance of the NS when compared to the water-wet (untreated) core plugs. In comparison, the propagation of the NS was slightly delayed in the porous medium covered by 9-phenanthrenyl groups, and retention increased from 0.69 to 0.72 mg/g. Results suggested that transport of the NSs was not impacted by variation in surface wettability and that polyaromatic groups on the rock surface were the primary contributor to the increased interaction between the NS and the carbonate minerals.

Synergistic Efficiency of Zinc Oxide/Montmorillonite Nanocomposites and a New Derived Saponin in Liquid/Liquid/Solid Interface-Included Systems: Application in Nanotechnology-Assisted Enhanced Oil Recovery.

Oil production faces challenges such as limited oil production from carbonate reservoirs, high oil production costs, and environmental issues. Chemical flooding as an enhanced oil recovery (EOR) method (CEOR) can increase oil production by the use of chemical additives such as surfactants into the reservoirs. Surfactants can increase oil recovery by interfacial tension (IFT) reduction and alteration of the rock wettability from oil-wet to water-wet. The synthesis of chemicals such as synthetic surfactants is usually costly and harmful to the environment. To solve these problems, many researchers have oriented on the use of natural surfactants instead of synthetic ones within the CEOR process. A new approach to increase the efficiency of CEOR is the synergizing of the chemical additives with nanoparticles as a hybrid fluid, which is known as the nanotechnology-assisted EOR method. In this research, a natural surfactant derived from Cyclamen persicum (CP) plant was extracted, and its performance was optimized with the zinc oxide/montmorillonite (ZnO/MMT) nanocomposite in a synergistic usage. At the optimum concentration of the surfactant, the measurements of the IFT and the contact angle show 57.78 and 61.58% optimizations, respectively. Also, in the presence of NaCl, the performance of CP is improved. IFT and contact angle measurements were also conducted for ZnO/MMT nanofluids and CP-ZnO/MMT as hybrid nanofluids. Results indicate that ZnO/MMT nanocomposites can alter the wettability of the carbonate rock to the water-wet state. Also, the CP-ZnO/MMT hybrid nanofluid shows a good potential in both IFT reduction and altering wettability from oil-wet to water-wet. Finally, to investigate the effects of solutions on increasing oil recovery factor (RF), the optimum concentrations of the surfactant, nanocomposite, and hybrid solutions were selected for dynamic core flooding experiments, and improvements showed oil RF increases of 8.2, 6, and 13%, respectively.

Effect of Central Stability and Dynamic Neuromuscular Stabilization Exercises on Pain, Flexibility, Balance, Muscle Endurance and Quality of Life in Men With Nonspecific Chronic Low Back Pain

Background: Study on the effectiveness of new methods of low back pain treatment is very important due to its high prevalence. There is no consensus on the most effective treatment for low back pain, despite the existence of different treatments options. Objective: This study aims to assess the effect of 8 weeks of dynamic neuromuscular stabilization (DNS) and core stability (CS) exercises on pain, hamstring flexibility, balance, abdominal muscle strength, and quality of life (QoL) in men with chronic low back pain. Methods: Participants were 20 men with non-specific low back pain, randomly divided into two groups of DNS (Age=47.8±9.82 years, BMI=25.8±2.9 kg/m2) and CS (Age=42.4±11.8 years, BMI=28.1±13.1 kg/m2). Subjects performed exercises for 8 weeks. Before and after exercises, their pain, hamstring flexibility, static and dynamic balances, abdominal muscle strength, and QoL were assessed. For data analysis, the paired t-test and analysis of covariance were used, considering a significance level of P&lt;0.05. Results: Both training methods improved pain, abdominal muscle strength and static balance. The CS exercise significantly improved hamstring muscle flexibility, and DNS exercise significantly improved QoL. The comparison between the two methods showed no significant difference in any study variables. Conclusion: Both CS and DNS exercises can be used in designing the interventions for patients with chronic low back pain.

The relationships between static and dynamic core stability and anaerobic exercise capacity in young elite male soccer players

Objective: To investigate the associations between static and dynamic core stability and anaerobic exercise capacity in young elite male soccer players. Materials and Methods: Thirty-five athletes with a median (IQR 25/75) age of 17 (17/18) years were participated in the study. Static core stability and dynamic core stability were evaluated with side bridge test and Y balance test, respectively. Vertical Jump Test and Running-Based Anaerobic Sprint Test (RAST) were used as anaerobic exercise capacity related performance tests. Anaerobic exercise capacity was determined by using Wingate Anaerobic Test (WAnT). Results: Significant but weak correlations were observed between dynamic core stability and WAnT average power (r= 0.370, p=0.029) and between dynamic core stability and RAST peak power (r= 0.371, p=0.028). No other significant relationships were detected between other core stability and anaerobic exercise capacity related measures (p&gt;0.05). Conclusions: It was determined that anaerobic exercise capacity is not related to static core stability, while poorly associated to dynamic core stability.

Newly engineered alumina quantum dot-based nanofluid in enhanced oil recovery at reservoir conditions

In this work, a newly engineered alumina quantum dot-based nanofluid (α-AQDs; D ~ 4 nm; amorphous solid) and one commercial alumina nanoparticle-based nanofluid (γ-ANPs; D ~ 20 nm; crystalline type) with the capability of strong colloidal dispersion at reservoir conditions, such as, high salinity, divalent ions (Ca2+) and high temperature was compared. The main goal of this research was to study the crude oil displacement mechanisms of alumina suspensions as a function of variety in size and particle morphology in aged carbonate rocks. The strong interaction potential between the particles was achieved by the citric acid and a special composition of a carboxylate-sulfonate-based polyelectrolyte polymer as an effective dispersant compound on the surface, leading to a negative particle charges and an additional steric and electrostatic repulsion. Wettability alteration upon exposure to fluids using the contact angle and the Amott cell were performed on saturated carbonate plug samples and rock slices. While, dynamic core displacements were conducted to test the water/nanofluid/oil flow and nanoparticle retention behavior thorough typical pore throats underground the reservoir conditions. The stability results revealed that PE-polymer was able to create a long-term colloidal fluid during 30 days. It was found that mass concentration of nanofluid increased with decreasing in particle size. The optimal amount of particles in aqueous solution was obtained 0.05 wt% for ANPs, increased up to 0.1 wt% for AQDs. Analysis of experiments showed that wettability alteration was the main mechanism during nanofluid injection. Laboratory core-flooding data proved that the enhanced oil recovery due to a less concentration state by ANPs was consistent with AQDs at higher concentrations. In addition, permeability-impairment-behavior study was discussed in terms of possible mineral scale deposition and alumina release on the rock surface. Results showed that a large extent of permeability damage caused by mineral scale (55–59%). Alumina quantum dot-based nanofluids were found a minimum impairment (2–4%) and a significant reduction of ~ 10% in permeability was observed for ANPs-based nanofluid.

A Review of ApoE4 Interference Targeting Mitophagy Molecular Pathways for Alzheimer's Disease.

Alzheimer's disease (AD) is one of the major worldwide causes of dementia that is characterized by irreversible decline in learning, memory loss, and behavioral impairments. Mitophagy is selective autophagy through the clearance of aberrant mitochondria, specifically for degradation to maintain energy generation and neuronal and synaptic function in the brain. Accumulating evidence shows that defective mitophagy is believed to be as one of the early and prominent features in AD pathogenesis and has drawn attention in the recent few years. APOE ε4 allele is the greatest genetic determinant for AD and is widely reported to mediate detrimental effects on mitochondria function and mitophagic process. Given the continuity of the physiological process, this review takes the mitochondrial dynamic and mitophagic core events into consideration, which highlights the current knowledge about the molecular alterations from an APOE-genotype perspective, synthesizes ApoE4-associated regulations, and the cross-talk between these signaling, along with the focuses on general autophagic process and several pivotal processes of mitophagy, including mitochondrial dynamic (DRP1, MFN-1), mitophagic induction (PINK1, Parkin). These may shed new light on the link between ApoE4 and AD and provide novel insights for promising mitophagy-targeted therapeutic strategies for AD.

Synthesis of heterocyclic compounds and their utilities in the field biological science

The fact that most medications now on the market contain heterocycle molecules or heterocycle fragments, as well as their inherent adaptability and distinctive physicochemical features, has positioned them as true pillars of medicinal chemistry. Aside from the medications that have already been approved, several others are being researched for their potential to treat a variety of cancers. The inherent adaptability and dynamic core scaffold of these molecules have been used in anticancer research in particular. Nonetheless, heterocyclic compounds, like every other promising anticancer medication, are not without flaws. We present a comprehensive summary of heterocyclic active chemicals and families, as well as their key medical applications, in this article.

Long-term patterns of an interconnected core marine microbiota

BackgroundOcean microbes constitute ~ 70% of the marine biomass, are responsible for ~ 50% of the Earth’s primary production and are crucial for global biogeochemical cycles. Marine microbiotas include core taxa that are usually key for ecosystem function. Despite their importance, core marine microbes are relatively unknown, which reflects the lack of consensus on how to identify them. So far, most core microbiotas have been defined based on species occurrence and abundance. Yet, species interactions are also important to identify core microbes, as communities include interacting species. Here, we investigate interconnected bacteria and small protists of the core pelagic microbiota populating a long-term marine-coastal observatory in the Mediterranean Sea over a decade.ResultsCore microbes were defined as those present in > 30% of the monthly samples over 10 years, with the strongest associations. The core microbiota included 259 Operational Taxonomic Units (OTUs) including 182 bacteria, 77 protists, and 1411 strong and mostly positive (~ 95%) associations. Core bacteria tended to be associated with other bacteria, while core protists tended to be associated with bacteria. The richness and abundance of core OTUs varied annually, decreasing in stratified warmers waters and increasing in colder mixed waters. Most core OTUs had a preference for one season, mostly winter, which featured subnetworks with the highest connectivity. Groups of highly associated taxa tended to include protists and bacteria with predominance in the same season, particularly winter. A group of 13 highly-connected hub-OTUs, with potentially important ecological roles dominated in winter and spring. Similarly, 18 connector OTUs with a low degree but high centrality were mostly associated with summer or autumn and may represent transitions between seasonal communities.ConclusionsWe found a relatively small and dynamic interconnected core microbiota in a model temperate marine-coastal site, with potential interactions being more deterministic in winter than in other seasons. These core microbes would be essential for the functioning of this ecosystem over the year. Other non-core taxa may also carry out important functions but would be redundant and non-essential. Our work contributes to the understanding of the dynamics and potential interactions of core microbes possibly sustaining ocean ecosystem function.

Management of FAIS in professional soccer athletes and return to sports

The prevalence of femoroacetabular impingement syndrome in professional soccer athletes is high. Professional training and treatment conditions ensure an effective conservative therapy focusing on dynamic stability, motion control, muscle balance and core stability. In the case of persistent limitations, indication for surgery has to be considered carefully. The probability is high that return to aprofessional level of soccer is feasible. However, the period of rehabilitation is long, leading to apotential conflict area between economic and medical interests. Good communication and intensive patient education are essential.

Experimental Investigation of Low-Concentrated Nanocomposite Polymer Gels for Water Shutoff Treatment Under Reservoir Conditions

Summary Excessive water production is one of the main challenges in mature oil fields. Applying polymer gels has proven to be an effective chemical treatment to this problem. Because of some limitations in application of polymer gels in oil reservoirs with harsh conditions, using nanoparticles (NPs) in gel structure has been proposed recently to improve the performance of such systems. However, while main body of the previous studies has only focused on improvement of bulk properties of polymer gels in presence of NPs, there is a serious lack of data on their performance in porous media. In this study, we have conducted a comprehensive investigation on application of two new nanocomposite polymer gels through bulk-gel static tests and dynamic core displacement tests. Fe2O3 and NiO NPs at low concentrations (&amp;lt;100 mg·L−1) in AN125VLM/chromium acetate polymer gel system were used. The results of bulk bottle tests at 82℃ demonstrated that the nanocomposite gel systems have the same gelation time and gel strength as the NPs-free gel. Swelling ratio measurements were also performed in a high-salinity formation water (268 949 mg·L−1), and accordingly, while NiO NPs deteriorated the swelling behavior of the gel system, Fe2O3 NPs showed a positive impact. The results of the strain-sweep test demonstrated relatively similar linear viscoelastic region and thus the same gel strength for all gel samples. In addition, the results of the thermogravimetric analysis (TGA) revealed that Fe2O3 NPs had a minor positive impact on thermal resistance of the polymer gel system. Finally, high pressure-high temperature coreflooding experiments were carried out on three sandstone reservoir core samples. Although the NPs-free gel showed a desirable level of disproportionate permeability reduction, the injection of Fe2O3 nanocomposite gel showed unsatisfactory results and caused rock permeability degradation. The pressure drop trend and deposition of polymer gel particles at the upstream injection side confirmed the aggregation and plugging effect of NPs during injection. Our findings demonstrate the critical aspect of dynamic core displacement testing of nanocomposite gels before their use for field applications.