Differences In Viscosity Research Articles

Insight into the peristaltic motion through a tapered channel with Newton’s cooling subject to viscous dissipation, Lorentz force, and velocity slip

Peristalsis has gained significant attention due to its numerous applications in the medical field, engineering, and manufacturing industries. Therefore, the current work intends to look into the effects of variable liquid properties on the magnetohydrodynamics of peristaltic flow exhibited by viscous fluid through a tapered channel. The viscosity of the liquid differs over the thickness of the channel, and temperature-dependent thermal conductivity is considered. The constitutive relation for energy is formulated with the addition of viscous dissipation and heat generation/absorption. The assumption of velocity slip along with the convective boundary condition energizes the thermal system as well as the flow phenomena. The mathematical formulation is established on the grounds of low Reynolds number and long wavelength approximations. Perturbation solution were obtained for the resulting non-linear differential equations of momentum and energy for small values of variable viscosity and variable thermal conductivity. The effects of various relevant parameters on flow properties were investigated through graphical analysis. The results show that the maximum velocity does not occur in the middle of the tapered channel, but moves toward the upper wall with the increase in the variable viscosity difference between the walls. The application of viscosity is essential in many engineering and industrial processes.

Inhibition of PCSK9 with evolocumab modulates lipoproteins and monocyte activation in high-risk ASCVD subjects

BackgroundMechanistic studies suggest that proprotein convertase subtilisin/kexin type 9 inhibitors can modulate inflammation. MethodsDouble-blind, placebo-controlled trial randomized 41 ASCVD subjects with type 2 diabetes with microalbuminuria and LDL-C level >70 mg/dL on maximum tolerated statin therapy received subcutaneous evolocumab 420 mg every 4 weeks or matching placebo. The primary outcomes were change in circulating immune cell transcriptional response, lipoproteins and blood viscosity at 2 weeks and 12 weeks. Safety was assessed in all subjects who received at least one dose of assigned treatment and analyses were conducted in the intention-to-treat population. ResultsAll 41 randomized subjects completed the 2-week visit. Six subjects did not receive study medication consistently after the 2-week visit due to COVID-19 pandemic suspension of research activities. The groups were well-matched with respect to age, comorbidities, baseline LDL-C, white blood cell counts, and markers of systemic inflammation. Evolocumab reduced LDL-C by −68.8% (p < 0.0001) and −52.8% (p < 0.0001) at 2 and 12 weeks, respectively. There were no differences in blood viscosity at baseline nor at 2 and 12 weeks. RNA-seq was performed on peripheral blood mononuclear cells with and without TLR4 stimulation ("Stress" transcriptomics). "Stress" transcriptomics unmasked immune cell phenotypic differences between evolocumab and placebo groups at 2 and 12 weeks. ConclusionsThis trial is the first to demonstrate that PCSK9 mAB with evolocumab can modulate circulating immune cell properties and highlights the importance of "stress" profiling of circulating immune cells that more clearly define immune contributions to ASCVD.

Dietary Protein Levels in the Small Intestine and Carcass Traits of Cross-Breed Chickens

Protein is a source of nutrients that plays a significant role in biological processes. The current study aimed to evaluate the effects of feed with different protein levels on the pH and viscosity of the small intestine, ileum characteristics, and carcass traits of cross-breed chickens. A total of 160 cross-breed unsexed chicks aged 2 days were divided into three treatments (T1-T3), each consisting of 6 replications with 9 chicks per replication, consisting of a diet with protein level (T1; starter 18% and finisher 16%;), a diet with protein level (T2; starter 20% and finisher 18%), and a diet with protein level (T3; starter 22% and finisher 20%). Cross-breed chickens were crossed between Bangkok males and Lohmann laying hens. The variables were analyzed, including pH and viscosity of digesta, ileum characteristics consisting of total villous, height of villous, and depth of crypt. The carcass percentages consisting of the carcass, breast, thicks, wings, and back were measured. The research was analyzed using a completely randomized design. The results indicated that different protein levels in treatments were significantly different in total villous, height of villous, and depth of crypt but did not indicate a significant difference in pH and viscosity. Furthermore, the treatments have a significant difference in the carcass percentage and thick percentage but did not significantly affect the breast, wings, and back. It can be concluded that 22% crude protein in the starter and 20% crude protein in the finisher produced the greatest results in the intestinal characteristics and also in the carcass percentage of cross-breed chickens. Keywords: Carcass, Cross-breed chicken, Feed, Intestinal characteristic, Protein

Splitting morphology of low-viscous finger at different junctions of microchannels

This paper reports the splitting morphology of low-viscous fingers in the microchannels that are associated with flat T-shaped, curved T-shaped, and Y-shaped junctions. The numerical simulations are based on the finite volume approach and the volume of the fluid model. In this study, microchannels are filled with silicon oil. Perfluorodecalin is used to displace silicon oil from the microchannels. Due to viscosity differences, the low-viscous finger (LVF)-shaped instability evolves at the interface of fluids. A single LVF propagates in the parent channel, and at the junction, it splits into two identical LVFs. It is noted that the splitting morphology of LVF depends upon the shape of the junction and its wettability. Therefore, there are three different junctions, i.e. flat T-shaped, curved T-shaped, and Y-shaped, with three different wettability conditions [Formula: see text], i.e. hydrophilic ([Formula: see text]), hydrophobic ([Formula: see text]), and superhydrophobic ([Formula: see text]) are used for numerical investigation. It is found that a LVF splits symmetrically at all three different junctions but tips of LVFs are found to be convex in superhydrophobic conditions. The LVFs-shaped are curved in the limbs of curved T-shaped microchannel and straight in the limbs of flat T-shaped and Y-shaped microchannels. The findings of this paper may be used in lung biomechanics, respiratory diseases, biochemical testing, and many more.

Dichotomous effect of dietary fiber in pediatrics: a narrative review of the health benefits and tolerance of fiber.

Dietary fibers are associated with favorable gastrointestinal, immune, and metabolic health outcomes when consumed at sufficient levels. Despite the well-described benefits of dietary fibers, children and adolescents continue to fall short of daily recommended levels. This gap in fiber intake (i.e., "fiber gap") might increase the risk of developing early-onset pediatric obesity and obesity-related comorbidities such as type 2 diabetes mellitus into adulthood. The structure-dependent physicochemical properties of dietary fiber are diverse. Differences in solubility, viscosity, water-holding capacity, binding capability, bulking effect, and fermentability influence the physiological effects of dietary fibers that aid in regulating appetite, glycemic and lipidemic responses, and inflammation. Of growing interest is the fermentation of fibers by the gut microbiota, which yields both beneficial and less favorable end-products such as short-chain fatty acids (e.g., acetate, propionate, and butyrate) that impart metabolic and immunomodulatory properties, and gases (e.g., hydrogen, carbon dioxide, and methane) that cause gastrointestinal symptoms, respectively. This narrative review summarizes (1) the implications of fibers on the gut microbiota and the pathophysiology of pediatric obesity, (2) some factors that potentially contribute to the fiber gap with an emphasis on undesirable gastrointestinal symptoms, (3) some methods to alleviate fiber-induced symptoms, and (4) the therapeutic potential of whole foods and commonly marketed fiber supplements for improved health in pediatric obesity.

Synthesis and Characterization of New Nanohybrids Based on Carboxymethyl Scleroglucan and Silica Nanoparticles.

In this study, two new nanohybrids (NH-A and NH-B) were synthesized through carbodiimide-assisted coupling. The reaction was performed between carboxymethyl-scleroglucans (CMS-A and CMS-B) with different degrees of substitution and commercial amino-functionalized silica nanoparticles using 4-(dimethylamino)-pyridine (DMAP) and N,N'-dicyclohexylcarbodiimide (DCC) as catalysts. The morphology and properties of the nanohybrids were investigated by using transmission (TEM) and scanning electron microscopy (SEM), electron-dispersive scanning (EDS), attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FT-IR), X-ray photoelectron spectroscopy (XPS), powder X-ray diffraction (XRD), inductively coupled plasma atomic emission spectroscopy (ICP-OES), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and dynamic light scattering (DLS). The nanohybrids exhibited differences in structure due to the incorporation of polyhedral oligomeric silsesquioxane (POSS) materials. The results reveal that hybrid nanomaterials exhibit similar thermal properties but differ in morphology, chemical structure, and crystallinity properties. Finally, a viscosity study was performed on the newly obtained nanohybrid materials; viscosities of nanohybrids increased significantly in comparison to the carboxymethyl-scleroglucans, with a viscosity difference of 7.2% for NH-A and up to 32.6% for NH-B.

Application of biopolysaccharide green foam fluid to enhance CO2 sequestration in high-temperature and high-salinity saline aquifer

Saline aquifer, a geological body, is widely distributed in the world and has high CO2 sequestration potential. Due to the large differences in viscosity and density between the CO2 and brine and the micro-heterogeneity of the saline aquifer, CO2 override, and viscous fingering may occur in strata, resulting in low CO2 sequestration efficiency. Following the concept of green chemistry, this study formulated CO2 foam using biopolysaccharides and a green surfactant alkyl polyglycosides (APG), to enhance the CO2 sequestration efficiency in saline aquifers. The ability of three biopolysaccharides (diutan gum, welan gum and xanthan gum) to stabilize CO2 foam was explored. According to the foam drainage activation energy and the Ostwald ripening rate, the CO2 foam with diutan gum as the stabilizer and APG as the foaming agent exhibited the favorable performance. The mechanism of diutan gum stabilizing CO2 foam was analyzed through studies on intermolecular interactions, interfacial properties, rheology, and micromorphology studies. We then investigated the effects of foam quality and flow rate on the CO2 foam rheology in sandstone cores by analyzing the changes in CO2 saturation, the matching relationship between bubble diameters under different conditions and sandstone core pore size, and the variation in foam rheology was explained. Furthermore, the ability of CO2 foam to enhance CO2 sequestration was explored in saline aquifers using core-nuclear magnetic resonance techniques. CO2 foam largely reduces the water saturation of macropores and establishes high-seepage resistance to facilitate CO2 foam diversion to the meso- and micropores. This fully leverages the space in these pores to store CO2 and greatly improves CO2 sequestration in saline aquifers.

Investigation of mixing miscible liquids with high viscosity contrasts in turbulently stirred vessels using electrical resistance tomography

The time required to attain a sufficient degree of homogeneity i.e., mixing time, is an important parameter in mixing processes. This paper presents results from a study employing an experimental approach to estimate mixing times for a miscible Newtonian liquid mixture system with high viscosity contrasts in a turbulent stirred vessel. An Electrical Resistance Tomography (ERT) based technique has been adopted to monitor dimensionless mixing time across a range of additive viscosities, impeller designs, sizes, and speed. Dimensional analysis has been used to interpret these mixing time results in terms of the magnitude of the bulk inertia forces relative to the initial viscous forces within the added fluid. Critical non-dimensional numbers, uniting the properties of the two liquids, have been proposed as the criterion for avoiding undesirable operating conditions under which the mixing time is much longer than that required for mixing fluids with similar properties. The work proposes novel correlations for mixing time and incorporates a new dimensionless group, thereby enabling a more nuanced and accurate characterisation of mixing behaviours. This research stands to contribute to energy saving and waste minimisation efforts in the industry. It provides insights for process designers and simulation engineers, propelling a leap forward in the design and operation of mixing processes when dealing with liquid systems that have significant viscosity differences.

Dancing ejecta

Splashing of impacting drops produces a myriad of secondary spray droplets, which generate aerosols during rain on the ocean and can cause health hazards during the spraying of pesticides or enhance the droplet transmission of disease. Determining the size and number of the finest splashed droplets is therefore of practical interest. Herein, we use a novel experimental facility with a 26 m tall vacuum tube, to study well-controlled drop impacts at velocities as high as 22 m s $^{-1}$ , where we reach parameter regimes not studied before using freely falling drops. Using extreme video frame rates, we pinpoint the primary source of the finest spray, coming from the catastrophic bending and rupture of the sub-micron-thick ejecta sheet, which emerges at a high speed from the neck connecting the drop and pool. The axisymmetric bending and convoluted ejecta shapes are driven primarily by resistance from the surrounding air, but also depend on the viscosity difference between drop and pool, which influences the initial ejection angle of the sheet. These extreme impact conditions provide new insights into general spray formation, through a sequence of bucklings of the rising ejecta, which dances next to the drop surface and can also form an enclosed air torus.

The effect of solution viscosity on the quality of electroactive nanofibers produced by electrospinning

This work describes the modification of organic–inorganic nanofibrous templates for advanced electrotechnical applications and their filling with active particles from various materials, according to their intended use. The organic component of the templates consists of high molecular polyvinylpyrrolidone. The inorganic part is colloidal SiO2. The organic–inorganic templates produce by electrospinning can be filled with inorganic particles with diameter below 50 µm (for example, different types of spinels or electroactive nanopowders). The idea is to create a modifiable and flexible material for use as a template for electrodes or a solid electrolyte in a safe solid-state battery. The quality and properties of nanofibers are very important for advanced applications, and therefore, the optimization of the manufacturing process is needed. The most important property is the viscosity of the organic–inorganic solution for electrospinning. The influence of viscosity on the quality of nanofibrous layers was observed even with very subtle differences in viscosity. The age of the precursors and the resulting workability time also plays a significant role.Graphical abstract

A zinc metal complex as an NIR emissive probe for real-time dynamics and in vivo embryogenic evolution of lysosomes using super-resolution microscopy.

Zinc (Zn) based fluorescent metal complexes have gained increasing attention due to their non-toxicity and high brightness with marked fluorescence quantum yield (QY). However, they have rarely been employed in super-resolution microscopy (SRM) to study live cells and in vivo dynamics of lysosomes. Here, we present an NIR emissive highly photostable Zn-complex as a multifaceted fluorescent probe for the long-term dynamical distribution of lysosomes in various cancerous and non-cancerous cells in live condition and in vivo embryogenic evolution in Caenorhabditis elegans (C. elegans). Apart from the normal fission, fusion, and kiss & run, the motility and the exact location of lysosomes at each point were mapped precisely. A notable difference in the lysosomal motility in the peripheral region between cancerous and non-cancerous cells was distinctly observed. This is attributed to the difference in viscosity of the cytoplasmic environment. On the other hand, along with the super-resolved structure of the smallest size lysosome (∼77 nm) in live C. elegans, the complete in vivo embryogenic evolution of lysosomes and lysosome-related organelles (LROs) was captured. We were able to capture the images of lysosomes and LROs at different stages of C. elegans, starting from a single cell and extending to a fully matured adult animal.

Application of flow-diversion technologies to increase oil recovery at the Uzen field

Polymer flooding is a highly effective method of physical and chemical intervention in productive reservoirs. The primary characteristic of polymers is their ability to thicken water, which reduces the viscosity ratio between oil and water in the formation and diminishes water breakthrough conditions caused by viscosity differences or reservoir heterogeneity. Additionally, due to their increased viscosity, polymer solutions can more effectively displace both oil and bound reservoir water from the porous medium. They interact with the porous medium’s framework, including the rock and the cementing substance, leading to the adsorption of polymer molecules onto the surface of the porous medium. This adsorption blocks the channels or hinders water filtration within them. The extent of adsorption is significantly influenced by water mineralization and the rock’s mineral composition, necessitating the creation of a fringe from fresh water to reduce adsorption. Despite this, the positive aspect of adsorption in water-washed formations is evident, as it decreases permeability and aligns the pickup profile, which is particularly beneficial for conditions like those in the Uzen deposit. The article presents an analysis of the effectiveness of Flooding Displacement Technology (FDT) in this context.

Comparative Analysis of Physicochemical Properties of Oils from Groundnut, Melon, Watermelon and Orange Seeds

This study analyzed and compared the physicochemical properties of oils produced from groundnut, melon, watermelon and orange seeds. The moisture content, saponification value, iodine value, peroxide value, acid value, free fatty acid, ester value, refractive index, viscosity, density, specific gravity, cloud point, pour point, flash point and fire point of the oils were analyzed. There were no significant differences in iodine value, peroxide value, refractive index, viscosity, specific gravity, cloud point, pour point, flash point and fire point, while there were significant differences in the moisture content, saponification value, acid value, free fatty acid, ester value, and density, The results revealed that these oils contain low fatty acid value and they are good sources of edible oil as they have low acid value. These oils also have great potentials as industrially promising oils, with their high saponification and iodine values, they will be good raw materials for bio-lubricant production and for a variety of industrial applications.

The Effect of Fermentation Time on the Physicochemical and Microbiological Qualities of Buffalo Colostrum Kefir

This research aims to determine the best fermentation time to produce optimal buffalo colostrum kefir. Different fermentation times at 12, 24, 36, and 48 hours were used to measure the physicochemical and microbiological characteristics of buffalo colostrum kefir. To produce buffalo colostrum kefir, fermentation process at room temperature (27˚C±1) was used. Viscosity was measured using Ostwald viscometer and Total Dissolved Solid (TDS) was measured digital refractometer. Titratable acidity was analyzed using titration method and pH value was measured using pH meter. Protein content was analyzed using Kjeldahl method and fat content was analyzed using Soxhlet method. The result shows no significant differences (P&gt;0.05) in viscosity which results in a value of 0.92±0.09 to 0.80±0.04 cP. Meanwhile, it shows significant differences (P&lt;0.05) on TDS (24.02±0.80 to 13.30±0.76 ºBrix), titrable acid (1.96±0.10 to 2.53±0.04%), pH value (3.95±0.03 to 3.37±0.04), protein content (14.41±0.94 to 10.57±0.68%), fat content (20.33±0.88 to 6.89±0.90%), total LAB (2.85x106 to 9.57x106 CFU/ml), total yeast (2.16x105 to 7.76x105 CFU/ml), and total microbes (5.15x106 to 5.21x106 CFU/ml). The best treatment was 36 hours of fermentation with 20% grain concentration (w/v) because it produced the highest total Lactic Acid Bacteria (LAB), total yeast, and total microbes so it is potential to be a probiotic drink.

Influence of fluid viscosity hierarchy on the reverse-circulation displacement efficiency

Reverse-circulation cementing is an alternative strategy for well cementing where the cementing fluids are injected directly into the annulus from the surface. This cementing strategy can reduce downhole circulation pressures compared to conventional circulation cementing and potentially eliminate the need for retarders in the cement slurry. In reverse-circulation operations, the fluid hierarchy will normally involve density-unstable combinations along the annulus. Since the annular geometry prevents the mechanical separation of fluids, reverse-circulation cementing is associated with a risk of slurry contamination and mixing during placement. Although reverse-circulation cementing has been known for several decades and is used for cementing of both onshore and offshore wells, it remains unclear whether conventional circulation job design guidelines apply to reverse-cementing or indeed how fluid properties should be optimized for such operations. The purpose of the current study is to contribute to the understanding of buoyant annular displacements, with a particular focus on the role of viscosity hierarchy on the annular displacement in vertical and near-vertical annuli.We present a combined experimental and numerical study of density-unstable downward displacements in a downscaled, narrow concentric annulus. A transparent annulus flow loop was used to conduct downward displacements. A high-speed camera and a mirror arrangement were used to track the displacement. Numerical simulations of the experiments and selected other cases were performed using the open-source OpenFOAM computation framework. We study Newtonian and mildly shear-thinning fluids, and our study aims to determine whether it is more efficient to use a displacing fluid with higher viscosity or lower viscosity than the displaced fluid while maintaining a constant average viscosity for the fluid pair. The experimental and numerical results, which are in good qualitative agreement, demonstrate that the viscosity hierarchy of the fluids significantly affects the displacement flow features. Our results show that a more viscous displaced fluid leads to faster growth of the instabilities and, as a result, less efficient displacement. Oppositely, we observe less tendency for finger growth and a more diffusive mixing region for more viscous displacing fluids. The effect of the viscosity hierarchy can get stronger by increasing the inclination of the annulus and the viscosity difference between the fluids from 0.006 to about 0.02 Pa⋅s. The findings can assist in the selection of fluid properties for future reverse-circulation displacement operations.

Lightweight polyethylene terephthalate bead foams with good interfacial adhesion and thermal insulation performance fabricated by supercritical carbon dioxide secondary foaming strategy

AbstractThis paper reported the novel supercritical carbon dioxide (scCO2) secondary foaming and molding strategy to prepare the thermal‐insulation polyethylene terephthalate (PET) bead foam part with good interfacial adhesion and high expansion ratio. The incorporation of porous structure could effectively enhance the blowing agent solubility and fabricate the system viscosity difference, which contributed to the expansion and further welding of the expanded PET beads. Under the optimum foaming conditions, PET bead foam parts with excellent comprehensive performance were successfully prepared by molding method in the confined space via scCO2 secondary foaming, and the corresponding welding mechanism of PET beads was further investigated. The obtained foam parts possessed good tensile and compressive properties, reaching 1.03 and 1.27 MPa (at 20% strain) respectively. Besides, the foam part exhibited the low thermal conductivity of 0.060 Wm−1 K−1, which confirmed the improvement of thermal insulation performance owing to the high expansion ratio.

Correlating viscosity and die swell in 3D printing of polyphenylsulfone: A thermo-mechanical optimization modus operandi

Additive manufacturing (AM) of polyphenylsulfone (PPSU), an amorphous high-performance polymer (HPP), has shown promise in exhibiting structural integrity for many applications. With thermoplastic material extrusion 3D printing, parts consisting of layered melts exhibited voids, where the adhesion quality and void size depend on the processing parameters implemented during printing. However, the structure-process-property (SPP) relationships between the thermal properties and rheological and mechanical behavior of AM PPSU are poorly understood. In this study, a comprehensive analysis of the thermal, thermo-mechanical, and layer-by-layer build-up of PPSU is investigated and correlated with viscosity and extrudate die swell behavior with void fraction volume as confirmed by high-resolution x-ray computed tomography (XCT). Gas chromatography–mass spectrometry (GC–MS) pyrolysis confirmed PPSU composition and degradation at 480 °C, consistent with thermo-gravimetric analysis TGA. A 141% difference in viscosity was observed when processing temperatures increased from 350 °C to 400 °C. Likewise, extrudate die swell decreased with increasing temperatures, resulting in a 17% difference. Tensile and compressive properties confirmed that higher extruding temperatures resulted in lower porosity and higher mechanical strength. In general, higher extruding temperatures lower the viscosity to allow for stronger cohesion between layers; however, increasing the temperature too high results in a below unity extrudate die swell, reducing mechanical properties. Therefore, to optimize the mechanical integrity of 3D printed amorphous PPSU parts, an increase in the viscosity, near unity of the extrudate die swell, and tempered extrusion temperature are needed.

Degradation and stability studies of butadiene rubber: Correlation between experimental and computational values

Butadiene rubber (BR) is the second highest consuming synthetic elastomer after styrene butadiene rubber. It contains one double bond from each monomer unit in the polymeric backbone prone to oxidation and degradation process. The present study deals with oxidative stability study of BR with different type of antioxidants. Effect of concentrations of antioxidant is studied on degradation of BR by monitoring the stability through change in Mooney viscosity and color index. These exposed samples are characterized by FTIR and TGA to understand the polymer degradation behavior. The difference in Mooney viscosity vs antioxidant concentration of various experimental runs and their measured color levels are modeled successfully by data science models. A Random Forest model was used to model changes to Mooney Viscosity and a Support Vector Machine (SVM) classification model was used to model measured color levels as a function of experimental parameters such as antioxidant concentrations, temperature, and ageing time of samples. The model for Mooney Viscosity was further verified successfully by additional experiments which validated the model predictions.

Effects of flow characteristics on the heat transfer mechanism in Taylor flow

The capability of Taylor slugs to enhance heat transfer rate compared to that obtained from single-phase flow is well-documented. This study numerically investigated the hydrodynamics characteristics and heat transfer mechanism in liquid-liquid Taylor flow. A novel analysis method was introduced by comparing fluid flow and heat transfer parameters distributed at the axial and radial planes of the channel. In order to investigate transport phenomena, the unit cell length and frequency of slug generation over a wide range of phase superficial velocity ratio were examined. The simulations showed that the viscosity difference between the phases is a critical parameter of the slug frequency; a higher amount increases the frequency much greater. Conversely, a lower viscosity difference between the phases allows water slugs to expand axially more. The higher temperature gradient and a stronger recirculation in the shorter liquid plug region enhance the heat transfer rate leading to the highest cooling performance over the channel wall within a unit cell. The results also showed the significant importance of establishing shorter slugs, which improves the cooling performance in the slugs and enhances the heat transfer rate in the liquid slug region due to the greater radial flow mixing. The developed numerical model was verified by the results found in the literature showing good agreement.

Low-temperature synthesis of Nb-doped and Mn-doped SrTiO3 with easily controllable particle size

Heterovalently doped perovskite-type oxides are used in various electronic applications. Herein, we propose a low-temperature synthesis method for Nb- and Mn-doped SrTiO3 particles with a wide range of particle sizes that is conducted at temperatures close to room temperature (RT). The cation-doped SrTiO3 particles were synthesized under diverse solution conditions by varying the aging temperature, aging period, viscosity of solvents, and OH− concentration using facile and low-cost methods. The particle sizes were simply controlled by changing the ratio of H2O/ethanol solvents owing to their difference in viscosity at low temperatures. The uniformity of the particle sizes was significantly improved via a two-step aging process, that is, heating at a low temperature followed by RT aging. Additionally, the OH− concentration in aqueous solution had considerable impact on the rate of crystal growth, affecting particle size as well as morphology. This study demonstrates the feasibility for the low-temperature synthesis of cation-doped perovskite-type materials.