On th influence of wall roughness on gas flow in parallel plate microchannels

0361227 - ÚT 2012 BE eng C - Konferenční příspěvek (zahraniční konf.)
Vimmr, J. - Bublík, O. - Hajžman, M. - Luxa, Martin
On th influence of wall roughness on gas flow in parallel plate microchannels.
10th International Symposium on Experimental and Computational Aerothermodynamics of Internal Flows - ISAIF 10. Brussel: Vrije Universiteit Brussel, 2011, s. 53-60. ISBN N.
[International Symposium on Experimental and Computational Aerothermodynamics of Internal Flows /10./. Brussel (BE), 04.07.2011-07.07.2011]
Grant CEP: GA ČR(CZ) GA101/08/0623
Výzkumný záměr: CEZ:AV0Z20760514
Klíčová slova: perturbation method * incompressible Navier-Stokes equations * wall roughness
Kód oboru RIV: BK - Mechanika tekutin

The paper deals with application of the perturbation method to the solution of the non-linear system of the incompressible Navier-Stokes equations describing steady fluid flow between two parallel plates with a prescribed roughness function. The physical space is transformed to the Cartesian computational domain. The incompressible Navier-Stokes equations are linearized with the help of the perturbation method, where the relative roughness is considered as the perturbation parameter. These results are compared with numerical results obtained using the finite volume Navier-Stokes solver based on the projection method. The perturbation equations are also applied to the random roughness function.
Trvalý link: http://hdl.handle.net/11104/0198592