Pore-scale simulation of heat and mass transfer in deformable porous media

Mou, Xinzhu; Chen, Zhenqian

doi:10.1016/j.ijheatmasstransfer.2020.119878

Cited by 15 publications

(9 citation statements)

References 31 publications

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“…39 (3) The driving force of gravity is ignored because the depth of moisture transmission is very shallow. 19 …”

Section: Methodsmentioning

confidence: 99%

“…39 (3) The driving force of gravity is ignored because the depth of moisture transmission is very shallow. 19 Heat transfer. In the model, the influence of heat radiation could be neglected at low temperature, 22 thus, the heat transfer of the solid phase (PU) is mainly heat conduction, 40 and the heat transfer equation is shown as follows…”

Section: Simulation Of Heat and Water Vapor Transfermentioning

confidence: 99%

“…[14][15][16] With the development of computer technology and numerical algorithm, the finite element method (FEM) is utilized to resolve the velocity field of porous media through computational fluid dynamics (CFD) simulation, 17,18 which is beneficial to construct an accurate 3D model of the membrane. Furthermore, the simulation of the 3D model is increasingly applied in the research of the heat and mass transfer process 19,20 because the experimental method is inconvenient to make a series of samples, and it is hard to precisely control the fiber orientation to discuss the influence of structure parameters. 21,22 Although some research has surveyed the heat transfer of thermal protection fabric through the 3D model, 23,24 few studies were utilized to analyze the coupled transfer of heat and water vapor to improve the thermal comfort of fabrics because the transfer process involves heat convection, heat conduction, water vapor diffusion, and moisture convection.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of coupled transient heat and water vapor transfer in porous fiber membrane with different fiber orientations and porosity

Gao

et al. 2021

Journal of Industrial Textiles

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The transfer process of heat and water vapor in a porous fiber membrane was investigated through the simulation of a 3D model for optimizing the configuration design. 3D models with different fiber orientations and porosity were constructed by the parameter input method, and the accuracy of the model was validated by the coefficient of determination (R2) between the apparent velocity of the model and the air permeability of the membrane. The permeability of 3D model was used to reflect the discrepancy in fiber orientation of the model. The influences of fiber orientation and porosity on heat and water vapor transfer were surveyed by the coupled physics of heat transfer and dilute substance transfer. Since there was no temperature difference in the entire domain, heat conduction (10−9 W/m2) and moisture convection (10−14 mol·m−2·s−1) were faint in the model. With the diffusion of water vapor in the moisture, the heat convection flux and water vapor diffusion flux gradually decreased and reached equilibrium. When the permeability was increased by adjusting the fiber orientation (from 1.002 to 1.200 m2), the heat convection flux and water vapor diffusion flux followed a similar growth pattern due to the coupling effect of heat transfer and water vapor transfer. The R2 for the heat convection flux and water vapor transmission rate of the simulations and experiments with different porosity (44.87, 47.64 and 50.15%) were 0.999 and 0.923, respectively, which demonstrated the validation of the simulation in heat and water vapor transfer.

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“…39 (3) The driving force of gravity is ignored because the depth of moisture transmission is very shallow. 19 …”

Section: Methodsmentioning

confidence: 99%

Section: Simulation Of Heat and Water Vapor Transfermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simulation of coupled transient heat and water vapor transfer in porous fiber membrane with different fiber orientations and porosity

Gao

et al. 2021

Journal of Industrial Textiles

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“…In porous fabrics, the thermal physical properties of the coating solution and the yarn are combined into effective characteristics, namely effective volume heat capacity and effective thermal conductivity. The conservation of energy equation in the fabric is as shown in equation ( 1) [15,16].…”

Section: Equation For Heat Transfermentioning

confidence: 99%

“…The curing process of a film is a complex process in which heat transfer, mass transfer and resin volume shrinkage influence each other [15]. Heat is transferred from the environment to the interior of the film, which affects the mass transfer process by changing the internal temperature of the film.…”

Section: Mathematical Modelmentioning

confidence: 99%

Solvent diffusion mechanism of PMMA/ acetone coated glass fiber fabric during curing process

Zheng

Tong

2021

Journal of Industrial Textiles

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Fabric it is not an impermeable substrate because of fiber porosity. To study the solvent diffusion mechanism of coated fabric in the curing process, the drying model of PMMA/acetone coated glass fiber fabric was established. This drying model was verified by confocal Raman spectroscopy. Finally, the impact of fabric structure, thickness and porosity on the solvent diffusion process in coated fabrics was studied by the model. It was shown that the predicted solvent concentrations by the model were consistent with the experimental values. This model can be used to quantitatively calculate the solvent concentration at any position and at any time inside the coating film during the drying process. Moreover, it can also predict the curing time and residual solvent concentration of the coating fabric required to reach drying equilibrium. Compared with coated 3/1 twill, 5/3 satin and 2/1 twill, the solvent diffusion of coated plain fabric was faster during curing. Under the same environmental conditions, the thinner the fabric was and the greater the porosity was, the shorter the curing time was. The fitting equations for fabric thickness, fabric porosity and drying time were obtained, which can provide a theoretical guidance for the preparation, performance research and drying conditions optimization of PMMA coated textile materials.

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Insights into the interfacial transfer impedance behavior of moisture and dynamics of sorption diffusion in dried tobacco leaves surface

Ma,

Jiang,

Tie

et al. 2023

Cellulose

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Pore-scale simulation of heat and mass transfer in deformable porous media

Cited by 15 publications

References 31 publications

Simulation of coupled transient heat and water vapor transfer in porous fiber membrane with different fiber orientations and porosity

Simulation of coupled transient heat and water vapor transfer in porous fiber membrane with different fiber orientations and porosity

Solvent diffusion mechanism of PMMA/ acetone coated glass fiber fabric during curing process

Insights into the interfacial transfer impedance behavior of moisture and dynamics of sorption diffusion in dried tobacco leaves surface

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