A New Formulation for Prediction of Permeability of Nano Porous Structures using Lattice Botzmann Method
Publish place: Journal of Applied Fluid Mechanics، Vol: 10، Issue: 2
Publish Year: 1396
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JAFM-10-2_015
تاریخ نمایه سازی: 3 بهمن 1400
Abstract:
The standard lattice Boltzmann equation, LBE, is inadequate for simulating gas flows in nano scale flows with Knudsen numbers higher than ۰.۱. In the present study, rarefied gas flow in nano porous structures is simulated using the modified Lattice Boltzmann Method, LBM, which is able to cover wide range of flow regimes. The present study, reports the effects of the Knudsen number and porosity on the flow rate and permeability in slip and transitional flow regimes. For the first time, the Knudsen’s minimum effect in micro/nano porous was observed. A new correlation between the permeability, the porosity and the Knudsen number is then proposed which is able to predict the permeability of in-line and staggered nano porous structures in slip and transitional regimes.
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Authors
M. Mostafavi
Department of Mechanical Engineering, Najafabad branch, Islamic Azad University, Najafabad, Iran
A. H. Meghdadi Isfahani
Department of Mechanical Engineering, Najafabad branch, Islamic Azad University, Najafabad, Iran