Microgravity Science and Technology最新文献_第3页

Biological Experiments in Space: From Microgravity to Molecular Insights 太空生物实验：从微重力到分子洞察

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2026-02-18 DOI: 10.1007/s12217-026-10240-9

Vishnu Malakar, Gowthamarajan Kuppusamy, Galina Yu Vassilieva, Veera Venkata Satyanarayana Reddy Karri, SP Dhanabal, Manko Olga Mikhailovna, Nitesh Kumar Poddar

{"title":"Biological Experiments in Space: From Microgravity to Molecular Insights","authors":"Vishnu Malakar, Gowthamarajan Kuppusamy, Galina Yu Vassilieva, Veera Venkata Satyanarayana Reddy Karri, SP Dhanabal, Manko Olga Mikhailovna, Nitesh Kumar Poddar","doi":"10.1007/s12217-026-10240-9","DOIUrl":"10.1007/s12217-026-10240-9","url":null,"abstract":"<div>\u0000 \u0000 <p>Spaceflight missions have advanced techniques over the last decades, with astronauts spending their time for more than 6 months aboard the International Space Station. Nevertheless, the living and working conditions in outer space remain highly challenging and demanding for astronauts. Space science has also been a frontier area in life science research, which targets studying the human physiology of living beings and their physiological changes under microgravity. This review highlights the impact of microgravity on the alteration of human, plant, microbial, and rodent physiology, emphasising the effects of microgravity on the physiology of these organisms in a space environment. Different countries have their own space agencies, and they have increased their space research over the past few decades in preparation for future space missions. The spaceflight radiation-induced carcinogenic effects have emerged as a health risk during deep spaceflight missions. In the recent era, a huge number of cell-line and animal model experimental studies have been conducted to explore the microgravity radiation, lower and higher doses of radiation, heavy ions, and low Earth orbital environments have identified evident carcinogenicity. Deep space flight mission leads to Spaceflight Associated Neuro-ocular Syndrome and associated other diseases such as glaucoma, alzheimer’s disease, cerebral edema, and cancer. In this review, we have summarized the objectives of space biology, the historical background of different space agencies, different types of space radiation associated with several diseases, multiscale biological experiments under microgravity, and biological specimen experiments under different space agencies.</p>\u0000 </div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":"38 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Simulation of the Cleaning Process of Microchannel by an External Flow 微通道外流清洗过程的数值模拟

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2026-02-16 DOI: 10.1007/s12217-026-10239-2

Boris S. Maryshev, Lyudmila S. Klimenko

{"title":"Numerical Simulation of the Cleaning Process of Microchannel by an External Flow","authors":"Boris S. Maryshev, Lyudmila S. Klimenko","doi":"10.1007/s12217-026-10239-2","DOIUrl":"10.1007/s12217-026-10239-2","url":null,"abstract":"<div><p>The paper is devoted to the study of the process of cleaning a microchannel contaminated by impurity particles settling on its walls. The most common reason of microchannel clogging is the sorption of impurity particles by pore walls or “physical sorption”. This paper describes the problem of drift of solid non-interacting particles in a microchannel, which can stick to its walls under the action of the van der Waals forces and break away from the wall due to thermal noise and viscous stresses arising from the flow. The pressure drop is given between the channel inlet and outlet. At the initial moment of time, the channel walls are contaminated with adhered particles, i.e. the walls are uneven, which affects the formation of the flow structure through the channel. Over time, under the action of viscous stresses and thermal noise, the particles break away from the channel walls, causing its cleaning. The interaction of the detached particles with the flow is taken into account in the approximation of the laminar flow regime. In addition, the model takes into account random particle motion caused by diffusion. The problem is solved numerically within the framework of the random walk model. The evolution of the liquid flow in the channel during its cleaning is obtained: stream function, pressure, and vorticity fields. It is demonstrated that three cleaning scenarios can be observed: no cleaning, slow cleaning, and fast cleaning. To control the cleaning scenario the modulation of the pressure drop at the channel borders is investigated. It is shown that resonance phenomena can be observed. The dependencies of cleaning time on the modulation amplitude and frequency is obtained and studied. It is shown that changing the modulation parameters leads to a significant change in the cleaning time and helps control the cleaning process.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":"38 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Role of Boundary Conditions and Volumetric Heating in Electrothermal Anisotropic Porous Convection 电热各向异性多孔对流中边界条件和体积加热的作用

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2026-02-16 DOI: 10.1007/s12217-025-10222-3

C. S. Rachitha, C. E. Nanjundappa, I. S. Shivakumara

{"title":"Role of Boundary Conditions and Volumetric Heating in Electrothermal Anisotropic Porous Convection","authors":"C. S. Rachitha, C. E. Nanjundappa, I. S. Shivakumara","doi":"10.1007/s12217-025-10222-3","DOIUrl":"10.1007/s12217-025-10222-3","url":null,"abstract":"<div>\u0000 \u0000 <p>The study investigates the combined influence of uniform volumetric heating and an alternating current (AC) electric field on the onset of convection in an anisotropic, dielectric fluid-saturated Brinkman porous layer heated from below. The porous medium is anisotropic in both permeability and thermal diffusivity, with the vertical permeability fixed at twice the horizontal value, while the thermal anisotropy parameter is allowed to vary freely. The layer is bounded by isothermal surfaces subject to rigid-rigid, free-free, or rigid-free velocity conditions, with appropriate electric potentials applied. The generalized eigenvalue problem is solved numerically using Galerkin’s method, establishing the validity of the exchange of stabilities. The results show that increasing the AC electric Rayleigh number, Darcy number, and internal heat generation parameter hastens the onset of convection, whereas greater thermal anisotropy delays it. These trends persist across all boundary conditions, with rigid-rigid boundaries being the most stabilizing and free-free the least. However, at higher heat source strengths, the threshold values exhibit a reversal in trend between the rigid-free and free-free boundaries. The electric field alone can trigger instability at sufficiently high AC electric Rayleigh numbers, accompanied by a higher critical wavenumber. The findings elucidate the interplay among anisotropy, volumetric heating, and electric forcing, offering insights relevant to electrohydrodynamic cooling, microscale thermal management, porous insulation design, and energy conversion systems where coupled electric–thermal effects govern heat transport.</p>\u0000 </div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":"38 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Comprehensive Review of Flashing Phenomena and Evaporation Wave Propagation in Superheated Liquids 过热液体中闪蒸现象及蒸发波传播研究综述

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2026-02-13 DOI: 10.1007/s12217-025-10229-w

Kush Kumar Dewangan, Ojas Satbhai, Satish Kumar Gavel, Kiran Kumar Rokhade

引用次数: 0

Numerical Simulation of InGaSb Crystal Growth Under Micro- Normal- and High- Gravity Conditions 微正重力和高重力条件下InGaSb晶体生长的数值模拟

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2026-01-30 DOI: 10.1007/s12217-025-10220-5

Xin Jin, Bing Wang

{"title":"Numerical Simulation of InGaSb Crystal Growth Under Micro- Normal- and High- Gravity Conditions","authors":"Xin Jin, Bing Wang","doi":"10.1007/s12217-025-10220-5","DOIUrl":"10.1007/s12217-025-10220-5","url":null,"abstract":"<div><p>To investigate the effects of different gravity conditions on the solution flow fields and crystal growth rates during the dissolution and growth processes of InGaSb crystals utilizing the vertical gradient freezing (VGF) methods, two-dimensional numerical simulations were conducted. Nine numerical simulations were performed under a range of gravity conditions, including microgravity: 1 × 10<sup>− 4</sup> G, 0.01 G; small gravity: 0.1 G, 0.17 G (lunar gravity), 0.38 G (Mars); normal gravity: 1.0 G, and high gravity: 2.0 G, 5.0 G, and 10.0 G. The results demonstrated that the natural convection induced by gravity significantly affects the growth rates of InGaSb crystals. The growth rates were highly sensitive to variations in gravity, decreasing as gravity increased within the range of 0.01 to 2.0 G. Under microgravity conditions (no larger than 0.01 G), growth rates values were very similar, indicating that under microgravity the InGaSb growth process is diffusion-dominant. When gravity exceeds 2.0 G, the growth rates of InGaSb stabilize, but larger non-uniform areas develop as gravity increases, compromising the quality of the grown crystals.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":"38 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146083027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Simulation of Droplet Directional Transport on Multi-level Wettability Gradient Surfaces Under Microgravity Conditions 微重力条件下多级润湿性梯度表面液滴定向输运的数值模拟

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2026-01-28 DOI: 10.1007/s12217-025-10221-4

Leigang Zhang, Menghao Dun, Bo Xu, Shang Mao, Liwen Yue, Yonghai Zhang

{"title":"Numerical Simulation of Droplet Directional Transport on Multi-level Wettability Gradient Surfaces Under Microgravity Conditions","authors":"Leigang Zhang, Menghao Dun, Bo Xu, Shang Mao, Liwen Yue, Yonghai Zhang","doi":"10.1007/s12217-025-10221-4","DOIUrl":"10.1007/s12217-025-10221-4","url":null,"abstract":"<div>\u0000 \u0000 <p>This study employs two-dimensional numerical simulation to characterize droplet migration and collision dynamics on unidirectional and symmetrical multi-level wettability gradient (WG) surfaces under Earth (g₀), Martian (0.38 g₀), and microgravity (10⁻⁶g₀). Parametric analysis reveals WG = -15/2°/mm optimizes single-droplet migration time in microgravity, exhibiting minimal sensitivity to gravity reduction, while WG = -20/2°/mm maximizes efficiency under g₀. Larger droplets (D = 3 mm) accelerate terrestrial transport but severely impede microgravity migration, where smaller droplets (D = 2 mm) excel. Peak velocity (> 0.3 m/s), governed by WG and D independent of gravity, dictates acceleration capability. Final equilibrium morphology mainly depends on WG. For dual droplets, microgravity collision requires WG = ∓ 15/2& ∓ 20/2°/mm and D = 2 mm; lower gradients or larger diameters prevent collision. The results demonstrate that reduced gravity disrupts mirror-synchronized droplet motion observed under g₀, delaying collision initiation. These findings provide critical guidelines for designing passive capillary fluidic systems in variable-gravity environments, particularly space applications.</p>\u0000 </div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":"38 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146082916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Radiation-Induced Structural Modifications and Soot Evolution in Microgravity Laminar Flames at Elevated Pressure 微重力层流火焰在高压下辐射引起的结构改变和烟尘演化

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2026-01-20 DOI: 10.1007/s12217-025-10233-0

Jiaqian Zhang, Hui Du, Shuoxuan Hu, Wei Ji, Lei Zhou

{"title":"Radiation-Induced Structural Modifications and Soot Evolution in Microgravity Laminar Flames at Elevated Pressure","authors":"Jiaqian Zhang, Hui Du, Shuoxuan Hu, Wei Ji, Lei Zhou","doi":"10.1007/s12217-025-10233-0","DOIUrl":"10.1007/s12217-025-10233-0","url":null,"abstract":"<div><p>Microgravity environments significantly impact soot formation and flame stability in laminar diffusion flames, yet the underlying mechanisms remain poorly understood, especially in high-pressure combustion systems. This study utilizes a hybrid moment method (HMOM) coupled with P1 radiation modeling to investigate the radiation-induced modifications to temperature fields, flow structures, and soot evolution in ethylene-air co-flow flames under elevated pressures (1–8 bar), comparing normal gravity and microgravity conditions. Results show that microgravity environments amplify soot volume fractions by 200–300% compared to normal gravity, due to extended reactant residence times. Radiative heat losses lower peak flame temperatures by 20–150 K, with this reduction becoming more pronounced at higher pressures due to increased radiation from both gases and soot. At critical pressure thresholds in microgravity, a transition from closed-tip to open-tip flame structures occurs in co-flow laminar diffusion flames, driven by radiative heat losses approaching 45%–60% of total chemical energy. Unlike spherical flame extinction, laminar diffusion flames experience local extinction triggered by heat release rate (HRR) decay at the flame tip, followed by the opening of the hydroxyl radical (OH) zone. This structural modification creates an oxidative boundary discontinuity, preventing the OH zone from fully encapsulating soot particles, thus allowing soot to escape oxidation pathways.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":"38 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146026741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Gravity and Radiation on the Propagation of Spherically Expanding Ammonia/Air Flames 重力和辐射对氨/空气火焰球形膨胀传播的影响

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2026-01-17 DOI: 10.1007/s12217-026-10235-6

Shize Du, Yiqing Wang, Shengkai Wang, Zheng Chen

{"title":"Effects of Gravity and Radiation on the Propagation of Spherically Expanding Ammonia/Air Flames","authors":"Shize Du, Yiqing Wang, Shengkai Wang, Zheng Chen","doi":"10.1007/s12217-026-10235-6","DOIUrl":"10.1007/s12217-026-10235-6","url":null,"abstract":"<div><p>As a zero-carbon fuel, ammonia (NH<span>(_3)</span>) has attracted great interests recently. Due to its slow propagation speed, NH<span>(_3)</span> flames are strongly affected by gravity and radiation. This study investigates the propagation of spherically expanding NH<span>(_3)</span>/air flames under the combined effects of gravity and radiation using two-dimensional simulations with detailed chemistry and transport models. The results show that gravity significantly deforms the flame front, leading to a mushroom-shaped structure in which the local flame displacement speed varies along the front due to local stretch effects. This phenomenon becomes more pronounced at lower equivalence ratios as a result of the reduced flame speed. Overall, gravity enhances the global flame propagation speed. On the other hand, radiation slows the flame propagation by lowering the flame temperature and inducing an inward flow velocity. This makes the flame more susceptible to the influence of gravity and amplifies the deformation of the flame front. Finally, the performance of various approaches for determining the unstretched laminar flame speed from spherically expanding flames under gravitational and radiational conditions is assessed. It is found that when both gravity and radiation effects are significant, the spherically expanding flame method using flame radius history is not applicable, regardless of the definition of equivalent radius, and the surface-averaged method is the only reliable approach. This study provides insights into the understanding and accurate measurement of NH<span>(_3)</span>/air flame propagation characteristics.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":"38 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2026-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145983309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Droplet Forced Oscillations by Electrowetting-on-Dielectric (EWOD) with Contact Angle Saturation 接触角饱和条件下电介质电润湿液滴的强迫振荡

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2026-01-13 DOI: 10.1007/s12217-025-10231-2

Aleksey A. Alabuzhev, Marina A. Pyankova

引用次数: 0

Stability of Convection in Anisotropic PorousMedia: Influence of Throughflow and NonUniform Gravitational Fields Under Local Thermal Non-Equilibrium 各向异性多孔介质对流的稳定性：局部热不平衡条件下通流和非均匀重力场的影响

IF 1.3 4区工程技术

Microgravity Science and Technology Pub Date : 2025-12-29 DOI: 10.1007/s12217-025-10225-0

Y. H. Gangadharaiah, Ali B. M. Ali, N. Manjunatha, H. Nagarathnamma, Jagadish V. Tawade, Mirjalol Ashurov, Shaimaa A. M. Abdelmohsen, M. Ijaz Khan

{"title":"Stability of Convection in Anisotropic PorousMedia: Influence of Throughflow and NonUniform Gravitational Fields Under Local Thermal Non-Equilibrium","authors":"Y. H. Gangadharaiah, Ali B. M. Ali, N. Manjunatha, H. Nagarathnamma, Jagadish V. Tawade, Mirjalol Ashurov, Shaimaa A. M. Abdelmohsen, M. Ijaz Khan","doi":"10.1007/s12217-025-10225-0","DOIUrl":"10.1007/s12217-025-10225-0","url":null,"abstract":"<div><p>This study comprehensively investigates the effects of gravitational variations and throughflow of convection in anisotropic porous media under LTNE (local thermal non-equilibrium conditions). By using a normal mode analysis, the linear stability analyses are analyzed. The gravitational force is modelled in three forms- linear, parabolic, and exponential- all oriented along the spatial configuration’s vertical axis. The critical Rayleigh number for convection onset is approximated through the Galerkin approximation. The results show that the throughflow constraint consistently stabilizes the system, regardless of direction. Additionally, an increase in the thermal and mechanical conductivities leads to enhanced system stability, while greater mechanical anisotropy weakens the convection onset. Notably, the system demonstrates the highest stability under exponential gravity variations, compared to linear and parabolic variations. The initiation and consistency of convection in these systems play a crucial role in: Forecasting thermal extraction performance, reservoir temperature reduction, and crafting eco-friendly energy harvesting approaches.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":"38 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145887063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0