Numerical simulation of heat and mass transfer through porous solid with lattice Boltzmann method
| Autor: | Jian Chen, Hongtao Xu, Luo Zhuqing, Qin Lou |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Chemistry
020209 energy Grashof number Thermodynamics Film temperature 02 engineering and technology General Medicine Heat transfer coefficient 01 natural sciences Nusselt number Sherwood number Churchill–Bernstein equation Lewis number 010305 fluids & plasmas 0103 physical sciences Heat transfer 0202 electrical engineering electronic engineering information engineering |
| Zdroj: | Procedia Engineering. 205:787-793 |
| ISSN: | 1877-7058 |
| DOI: | 10.1016/j.proeng.2017.10.011 |
| Popis: | The heat and mass transfer through porous building envelope has an important impact on the hydrothermal performance of building enclosure, energy consumption and indoor environment. This article proposes a lattice Boltzmann method to simulate the double-diffusive mixed convection, fluid-solid conjugate heat transfer and adsorption process by porous media in an enclosure simultaneously. A double distribution lattice-Boltzmann model is established to implement heat transfer between fluid and solid and the adsorption behavior of porous media. The numerical investigations are performed at the pore scale with the considerations of interparticle, interfacial, and intraparticle heat and mass transfer characteristics. At Richardson number Ri=1.0, Lewis number Le=10, Buoyancy ratio Br=1.0, Prandtl number Pr=0.7, Grashof number Gr=104 and porosity ɛ=0.79, investigating absorption behaviour and time consumption concluded that increasing particle size led to a moderating adsorption rate and more time consumed to approach the saturation adsorption. Streamlines, isotherms, isoconcentrations, and the average Nusselt number Nuav and Sherwood number Shav also reported in detail. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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