Transport in Porous Media最新文献_第3页

Convection Dynamics in a Brinkman Bidisperse Porous Medium Under Internal Heating 内加热条件下Brinkman双分散多孔介质的对流动力学

IF 2.6 3区工程技术

Transport in Porous Media Pub Date : 2025-09-05 DOI: 10.1007/s11242-025-02213-0

F. Capone, R. De Luca, J. A. Gianfrani

{"title":"Convection Dynamics in a Brinkman Bidisperse Porous Medium Under Internal Heating","authors":"F. Capone, R. De Luca, J. A. Gianfrani","doi":"10.1007/s11242-025-02213-0","DOIUrl":"10.1007/s11242-025-02213-0","url":null,"abstract":"<div><p>This study explores the onset of thermal instability within a bidisperse porous medium saturated with a homogeneous, incompressible fluid, subjected to a non-uniform internal heat generation and constant temperature gradient due to heating from below. The fluid motion is modelled with the Darcy’s law in micropores, while the Brinkman’s law is employed in macropores to ensure a more accurate representation of momentum transfer across different scales. The system is modelled under the Oberbeck–Boussinesq approximation, where density variations are incorporated solely in the buoyancy term, with the fluid density being temperature-dependent. Linear and nonlinear stability analyses are performed and different profiles of depth-dependent heat source are considered to investigate its effect in various physical scenarios. Both analyses lead to a generalized eigenvalue problem that is solved numerically by means of the Chebyshev-<span>(tau)</span> method. The nonlinear stability analysis is carried out in the context of the energy theory by means of the differential constraints method. A golden section algorithm is implemented to determine the critical thresholds for linear and nonlinear stability analyses and discuss their proximity.</p></div>","PeriodicalId":804,"journal":{"name":"Transport in Porous Media","volume":"152 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11242-025-02213-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of Thermal and Hydrodynamic Behavior of Nanofluid Flow Through Porouse Cylindre in Stepped Channel with Elastic Upper Wall 弹性上壁阶梯通道中纳米流体通过多孔圆柱的热动力特性分析

IF 2.6 3区工程技术

Transport in Porous Media Pub Date : 2025-08-26 DOI: 10.1007/s11242-025-02221-0

Hanaa Derraz, Mohamed Bouzit, Atika Bencherif

{"title":"Analysis of Thermal and Hydrodynamic Behavior of Nanofluid Flow Through Porouse Cylindre in Stepped Channel with Elastic Upper Wall","authors":"Hanaa Derraz, Mohamed Bouzit, Atika Bencherif","doi":"10.1007/s11242-025-02221-0","DOIUrl":"10.1007/s11242-025-02221-0","url":null,"abstract":"<div><p>This study aims to investigate forced convection and heat transfer in a two-dimensional channel featuring a backward-facing step, a stationary adiabatic porous cylinder, and a deformable upper wall. The research addresses the complex coupling of fluid–structure interaction and porous media effects, a novel configuration not extensively explored in the existing literature. A numerical approach based on the finite element method within an arbitrary Lagrangian–Eulerian (ALE) framework is employed to simulate laminar flow and heat transfer over ranges of Reynolds (10 ≤ Re ≤ 200), Darcy (10<sup>−6</sup> ≤ Da ≤ 10<sup>−1</sup>), and Cauchy (10<sup>−7</sup> ≤ Ca ≤ 10<sup>−4</sup>) numbers. The results, illustrated through isotherms, streamline patterns, and both local and average Nusselt number distributions, demonstrate that increasing the Reynolds number significantly enhances convective heat transfer. A decrease in the cylinder’s porosity strengthens vortex formation and thermal gradients, leading to a 36.4% increase in the average Nusselt number. Moreover, greater wall elasticity yields a modest 2.3% improvement in heat transfer. Regarding fluid–structure interaction, the maximum deformation of the upper elastic wall increases markedly with the Cauchy number, decreases by approximately 52.6% as the Reynolds number increases from 10 to 200, and reaches a peak at an intermediate Darcy number (Da = 10<sup>−3</sup>), highlighting the coupled influence of flow inertia and porous permeability. These findings provide quantitative insights into the interplay between structural deformation and porous media, contributing to the optimization of thermal management strategies in deformable thermo-fluidic systems.</p></div>","PeriodicalId":804,"journal":{"name":"Transport in Porous Media","volume":"152 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

The Nield-Kuznetsov Functions and How they Arise in Modelling Flow in the Transition Layer 涅尔德-库兹涅佐夫函数及其在过渡层流建模中的出现

IF 2.6 3区工程技术

Transport in Porous Media Pub Date : 2025-08-26 DOI: 10.1007/s11242-025-02219-8

M. H. Hamdan, M. S. Abu Zaytoon

引用次数: 0

Explosive Byproduct Gas Transport Through Sorptive Geomedia 爆炸副产物气体通过吸附几何形状的输送

IF 2.6 3区工程技术

Transport in Porous Media Pub Date : 2025-08-26 DOI: 10.1007/s11242-025-02212-1

Chelsea W. Neil, Daniel L. Eldridge, Hayden Miller, John P. Ortiz, Philip H. Stauffer, Thom Rahn, Scott T. Broome, Hakim Boukhalfa, Garrett G. Euler

{"title":"Explosive Byproduct Gas Transport Through Sorptive Geomedia","authors":"Chelsea W. Neil, Daniel L. Eldridge, Hayden Miller, John P. Ortiz, Philip H. Stauffer, Thom Rahn, Scott T. Broome, Hakim Boukhalfa, Garrett G. Euler","doi":"10.1007/s11242-025-02212-1","DOIUrl":"10.1007/s11242-025-02212-1","url":null,"abstract":"<div><p>Current underground nuclear explosion (UNE) detection strategies rely heavily on atmospheric noble gas sampling of radioxenon. However, discriminating nuclear weapons testing programs from civilian sources is difficult due to highly variable atmospheric radioxenon backgrounds and processes affecting subsurface transport of parent radionuclides. We aim to study the transport of gases produced by subsurface explosions as novel stable signatures for underground nuclear explosion (UNE) monitoring. These gases may be produced in large quantities with distinct molecular ratios, which will be impacted by subsurface transport processes. To demonstrate how ratios of gases produced by explosions can change during transport in geomaterials, we conducted laboratory benchtop experiments on the transport of carbon dioxide (CO<sub>2</sub>) and hydrogen (H<sub>2</sub>) gases through variably saturated zeolitic tuff, which is abundant at the historic US testing site. We observed that zeolitic tuff sorbs substantial quantities of CO<sub>2</sub> while allowing H<sub>2</sub> to transport more freely, leading to changes in the molecular ratios of the two gases along the transport pathway. Gas uptake in the dry zeolitic tuff core was 72.3% for CO<sub>2</sub>, compared with 53.4% for xenon and 7.6% for H<sub>2</sub>. The presence of 20% water saturation disrupted the CO<sub>2</sub> sorption process, though to a lesser extent than observed for noble gases, with a 36.7% drop in xenon sorption compared with a 21.9% drop for CO<sub>2</sub>. These results represent the first observations of zeolite sorption altering explosive gas ratios during transport through geomedia relevant to nuclear proliferation monitoring.</p></div>","PeriodicalId":804,"journal":{"name":"Transport in Porous Media","volume":"152 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Convolution Neural Network Model Framework to Predict Microscale Drag Force for Turbulent Flow in Porous Media 预测多孔介质湍流微尺度阻力的卷积神经网络模型框架

IF 2.6 3区工程技术

Transport in Porous Media Pub Date : 2025-08-23 DOI: 10.1007/s11242-025-02209-w

Vishal Srikanth, Andrey V. Kuznetsov

{"title":"Convolution Neural Network Model Framework to Predict Microscale Drag Force for Turbulent Flow in Porous Media","authors":"Vishal Srikanth, Andrey V. Kuznetsov","doi":"10.1007/s11242-025-02209-w","DOIUrl":"10.1007/s11242-025-02209-w","url":null,"abstract":"<div><p>Convolution neural networks (CNNs) are well-suited to model the nonlinear relationship between the microscale geometry of porous media and the corresponding flow distribution, thereby accurately and efficiently coupling the flow behavior at the micro- and macroscale levels. In this paper, we have identified the challenges involved in implementing CNNs for macroscale model closure in the turbulent flow regime, particularly in the prediction of the drag force components arising from the microscale level. We report that significant error is incurred in the crucial data preparation step when the Reynolds averaged pressure and velocity distributions are interpolated from unstructured stretched grids used for large eddy simulation (LES) to the structured uniform grids used by the CNN model. We show that the range of the microscale velocity values is 10 times larger than the range of the pressure values. This invalidates the use of the mean squared error loss function to train the CNN model for multivariate prediction. We have developed a CNN model framework that addresses these challenges by proposing a conservative interpolation method and a normalized mean squared error loss function. We simulated a model dataset to train the CNN for turbulent flow prediction in periodic porous media composed of cylindrical solid obstacles with square cross-section by varying the porosity in the range 0.3 to 0.88. We demonstrate that the resulting CNN model predicts the pressure and viscous drag forces with less than 10% mean absolute error when compared to LES while offering a speedup of O(10<sup>6</sup>).</p></div>","PeriodicalId":804,"journal":{"name":"Transport in Porous Media","volume":"152 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11242-025-02209-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144892428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Permeability Dependency of Turbulence Over Packed-Beds 充填床上湍流的渗透率依赖性

IF 2.6 3区工程技术

Transport in Porous Media Pub Date : 2025-08-23 DOI: 10.1007/s11242-025-02218-9

Kazuhiko Suga, Masatoshi Era, Yusuke Kuwata

{"title":"Permeability Dependency of Turbulence Over Packed-Beds","authors":"Kazuhiko Suga, Masatoshi Era, Yusuke Kuwata","doi":"10.1007/s11242-025-02218-9","DOIUrl":"10.1007/s11242-025-02218-9","url":null,"abstract":"<div><p>To characterize turbulence over porous media with porosities <span>(varphi <0.5)</span>, three types of packed-beds were manufactured: cubically packed spheres (case S), randomly packed rice-grain-shaped pellets (case E), and crushed stones (case C), with measured porosities of <span>(varphi =0.45)</span>, 0.37, and 0.30, respectively. After measuring their permeabilities, particle image velocimetry (PIV) measurements were conducted for flows under conditions characterized by the permeability Reynolds number (<span>(Re_K)</span>) ranging from 2.1 to 18.3. The results were then compared with previous data on turbulent flows over foamed ceramics with a porosity of <span>(varphi simeq 0.8)</span>, reported by Suga et al. (Int J Heat Fluid Flow 31(6), 974–984, 2010). The measured turbulence characteristics were analyzed to examine their correlation with <span>(Re_K)</span> and to evaluate the applicability of a unified scaling approach across a wide range of porous beds. The findings suggest that while some distribution profiles generally follow <span>(Re_K)</span>, this parameter alone is insufficient as a universal scaling factor for turbulence over packed-beds, as the roughness scale also exhibits significant dependence on surface shape rather than the porosity.</p></div>","PeriodicalId":804,"journal":{"name":"Transport in Porous Media","volume":"152 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144892427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Stability Analysis of Darcy–Bénard Convection Subjected to Time-Dependent Heating Using an LTNE Model 基于LTNE模型的时间相关加热下darcy - b<e:1>对流稳定性分析

IF 2.6 3区工程技术

Transport in Porous Media Pub Date : 2025-08-21 DOI: 10.1007/s11242-025-02223-y

Kapil Dev, Chunendra K. Sahu

{"title":"Stability Analysis of Darcy–Bénard Convection Subjected to Time-Dependent Heating Using an LTNE Model","authors":"Kapil Dev, Chunendra K. Sahu","doi":"10.1007/s11242-025-02223-y","DOIUrl":"10.1007/s11242-025-02223-y","url":null,"abstract":"<div><p>A bounded porous domain saturated with a Newtonian fluid and subjected to time-dependent temperature variation has various practical applications, such as in solar energy storage, nuclear reactors, food processing industry, and agricultural science. In the current work, we study Darcy–Bénard convection in a horizontal fluid-saturated porous layer that is heated from below and confined in all directions. We look into an intricate form of the modulated Darcy–Bénard problem, where the temperatures at the bottom and top boundaries undergo sinusoidal temporal modulation about their mean values. We perform linear stability analysis to understand the onset of convection using a two-phase heat model based on the assumption that the solid and fluid phases of the system are not in local thermal equilibrium. The time-periodic eigenvalue problem obtained here is solved using the Floquet theory to find the onset threshold value of critical Rayleigh number. Our results suggest that the convection through subharmonic modes is preferable for either small (<span>(text {H} < 4.3))</span> or large (H <span>(> 175)</span>) interphase heat transfer coefficient, while for the moderate values of H, convection takes place through harmonic mode only. In the paper, we discuss the results in detail and present a comparison with those from previous studies.</p></div>","PeriodicalId":804,"journal":{"name":"Transport in Porous Media","volume":"152 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144887984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Hybrid-Dimensional Stokes–Brinkman–Darcy Model for Arbitrary Flows to the Fluid–Porous Interface 流-孔界面任意流动的混合维Stokes-Brinkman-Darcy模型

IF 2.6 3区工程技术

Transport in Porous Media Pub Date : 2025-08-20 DOI: 10.1007/s11242-025-02220-1

Linheng Ruan, Iryna Rybak

{"title":"A Hybrid-Dimensional Stokes–Brinkman–Darcy Model for Arbitrary Flows to the Fluid–Porous Interface","authors":"Linheng Ruan, Iryna Rybak","doi":"10.1007/s11242-025-02220-1","DOIUrl":"10.1007/s11242-025-02220-1","url":null,"abstract":"<div><p>Mathematical modelling of coupled flow systems containing a free-flow region in contact with a porous medium is challenging, especially for arbitrary flow directions to the fluid–porous interface. Transport processes in the free flow and porous medium are typically described by distinct equations: the Stokes equations and Darcy’s law, respectively, with an appropriate set of coupling conditions at the common interface. Classical interface conditions based on the Beavers–Joseph condition are not accurate for general flows. Several generalisations are recently developed for arbitrary flows at the interface; some of them are however only theoretically formulated and still need to be validated. In this manuscript, we propose an alternative to couple free flow and porous-medium flow, namely the hybrid-dimensional Stokes–Brinkman–Darcy model. Such formulation incorporates the averaged Brinkman equations within a complex interface between the free-flow and porous-medium regions. The complex interface acts as a buffer zone facilitating storage and transport of mass and momentum and the model is applicable for arbitrary flow directions. We validate the proposed hybrid-dimensional model against the pore-scale resolved model in multiple examples and compare numerical simulation results also with the classical and generalised coupling conditions from the literature. The proposed hybrid-dimensional model demonstrates its applicability to describe arbitrary coupled flows and shows its advantages in comparison to other generalised coupling conditions.</p></div>","PeriodicalId":804,"journal":{"name":"Transport in Porous Media","volume":"152 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11242-025-02220-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of Hierarchical Homogenization Technique in Thermal Conductivity Computation for Micro-Computed Tomography (Micro-CT) Images of Porous Media 分层均匀化技术在多孔介质微计算机断层扫描（Micro-CT）图像导热系数计算中的应用

IF 2.6 3区工程技术

Transport in Porous Media Pub Date : 2025-08-20 DOI: 10.1007/s11242-025-02211-2

Ali Madani, Saeid Khasi, Apostolos Kantzas

{"title":"Application of Hierarchical Homogenization Technique in Thermal Conductivity Computation for Micro-Computed Tomography (Micro-CT) Images of Porous Media","authors":"Ali Madani, Saeid Khasi, Apostolos Kantzas","doi":"10.1007/s11242-025-02211-2","DOIUrl":"10.1007/s11242-025-02211-2","url":null,"abstract":"<div><p>Thermal properties play a critical role in environments and processes involving heat exchange and transfer. Heat transport in porous media has been a subject of extensive study due to its significant impact on applications ranging from in situ hydrocarbon production to geothermal energy projects. Micro-CT imaging has become a powerful tool for characterizing porous media, with its use increasingly expanding in recent years, driven by progress in computational techniques. Homogenization approaches provide a powerful means to analyze transport phenomena in Micro-CT images, offering reliable accuracy while reducing computational errors. In this study, the application of the hierarchical homogenization (HH) technique for thermal conductivity was explored. Various sources of error, including the choice of homogenization scale and numerical conditions such as padding thickness, were systematically investigated and compared to validation dataset acquired by Micro-CT data and high-fidelity direct numerical simulations. The results indicated less than 5% error in the first-order single-stage HH approach for all studied material schemas. Hyperbolic trend of the error was observed with the order of homogenization. Subsequently, telescopic hierarchical homogenization (THH) was found effective as a new approach for more complex systems with a negligible (less than 1.5%) error compared to single-stage HH. Furthermore, the HH error was investigated for a set of 19 synthetic and real samples to assess the effect of porosity and porosity variation in subsamples on the final error values, and a mathematical model was obtained for each of the material schemas. Results showed that in the similar porosity cases, sample with the higher dispersion of porosity will result in more error of thermal conductivity through HH procedure.</p></div>","PeriodicalId":804,"journal":{"name":"Transport in Porous Media","volume":"152 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Measurement of Effective Diffusion Coefficient in Porous Media using the Naphthalene Sublimation 用萘升华法测量多孔介质中的有效扩散系数

IF 2.6 3区工程技术

Transport in Porous Media Pub Date : 2025-08-20 DOI: 10.1007/s11242-025-02216-x

Alireza Shahyad, Behnam Khoshandam

{"title":"Measurement of Effective Diffusion Coefficient in Porous Media using the Naphthalene Sublimation","authors":"Alireza Shahyad, Behnam Khoshandam","doi":"10.1007/s11242-025-02216-x","DOIUrl":"10.1007/s11242-025-02216-x","url":null,"abstract":"<div><p>Applications of porous media are increasing in various scientific disciplines, such as energy storage or conversion systems and giant capacitors. It has been recognized that the transport and reaction processes occurring within pores significantly influence the performance of porous media, while transport phenomena at the pore scale are not well-characterized. The experimental effective diffusion coefficient of naphthalene-nitrogen was studied using a regression method based on a radial dimension transient model of diffusion in the porous medium. The weight of samples containing naphthalene was continuously recorded by a digital precision balance. This study was performed at three different temperatures: 303.15 K (30 °C), 323.15 K (50 °C), and 343.15 K (70 °C) at atmospheric pressure, with porous metal matrices of 90% porosity containing different amounts of naphthalene in a laminar nitrogen stream. The fitting of the diffusion equation in spherical coordinates and the weight changes provided the mass transfer coefficients; as a result, a power correlation to estimate the effective diffusion coefficient was obtained.</p></div>","PeriodicalId":804,"journal":{"name":"Transport in Porous Media","volume":"152 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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