Simulation of High Knudsen Number Gas Flows in Nanochannels via the Lattice Boltzmann Method

Abstract:

Using a modified Lattice Boltzmann Method (LBM), pressure driven flow through micro and nano channels has been modeled. Based on the improving of the dynamic viscosity, an effective relaxation time formulation is proposed which is able to simulate wide range of Knudsen number, Kn, covering the slip, transition and to some extend the free molecular regimes. The results agree very well with exiting empirical and numerical data.

• Periodical: Advanced Materials Research (Volumes 403-408)
• Pages: 5318-5323
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.403-408.5318
• Online since: November 2011
• Authors: A.H. Meghdadi Isfahani, A. Soleimani, A. Homayoon
• Keywords: Knudsen Minimum Effect, Lattice Boltzmann Method, Micro-Flow, Nano Flows, Rarefaction

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