Rarefied gas flow over an in-line array of circular cylinders

摘要: A steady rarefied gas flow through periodic porous media kept at a uniform temperature is considered on the basis of Bhatnagar–Gross–Krook equation and diffuse reflection condition solid boundary. Under assumption that period much smaller than length scale variation global pressure distribution, macroscopic fluid model describing distribution mass flux in medium derived by homogenization previously proposed Charrier Dubroca [Multiscale Model. Simul. 2, 124 (2003)]. The effective diffusion coefficient contained constructed numerically as function Knudsen number, case consisting an in-line array circular cylinders, with help numerical analysis infinite expanse cylinder driven small gradient. An application to isothermal slab induced difference is...