|January 26, 2014, 05:13||
Molecular viscosity calculation in LES on OpenFOAM
Join Date: Oct 2012
Location: Chicago, Illinois
Posts: 393Rep Power: 7
I am working on a custom-code in OpenFOAM (libOpenSmoke). In this code, I have written the definition of the scalar dissipation rate in LES which includes molecular viscosity. The following is the formulation that I have used: In this formulation, turbulence->mu() refers to molecular viscosity, sigmat refers to laminar Schmidt number and Z is mixture fraction.
chi_st=2 * (turbulence->mu()/(rho*sigmat)) * magSqr(fvc::grad(Z));
In literature, typically the filtered molecular viscosity is assumed to be a function of filtered temperature following a power law where the subgrid fluctuations of the temperature are neglected.
Would somebody PLZ hint me that which formulation is used in LES of OpenFOAM for calculating the filtered molecular viscosity?
|Thread||Thread Starter||Forum||Replies||Last Post|
|Non-isothermal incompressible LES in OpenFOAM||sagnikmazumdar||OpenFOAM Running, Solving & CFD||6||March 9, 2016 04:41|
|New OpenFOAM Forum Structure||jola||OpenFOAM||2||October 19, 2011 06:55|
|Cross-compiling OpenFOAM 1.7.0 on Linux for Windows 32 and 64bits with Mingw-w64||wyldckat||OpenFOAM Announcements from Other Sources||3||September 8, 2010 06:25|
|Modified OpenFOAM Forum Structure and New Mailing-List||pete||Site News & Announcements||0||June 29, 2009 05:56|
|subgrid turbulent viscosity for UDF in LES||David TAIEB||FLUENT||0||April 2, 2007 08:27|