CFD Online Logo CFD Online URL
Home > Forums > OpenFOAM Running, Solving & CFD

Viscous rhopSonicFoam

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   February 9, 2006, 03:29
Default Hi everybody, I have tried t
New Member
Join Date: Mar 2009
Posts: 24
Rep Power: 8
didomenico is on a distinguished road
Hi everybody,
I have tried to manage a viscous version of rhopSonicFoam to solve high-Mach number flows.
Since the equations are written in conservative form, the viscous terms have to be formulated in an explicit manner (as far as I know):

fvVectorMatrix rhoUEqn
+fv::gaussConvectionScheme<vector>(mesh, phiv, rhoUScheme).fvmDiv(phiv, rhoU)

solve(rhoUEqn == - fvc::grad(p)
+ fvc::div(mu*dev2(fvc::grad(U)().T()))
+ fvc::laplacian(mu, U)

fvScalarMatrix rhoEEqn
+ mvConvection.fvmDiv(phiv, rhoE)

solve(rhoEEqn == - mvConvection.fvcDiv(phiv, p)
+ fvc::laplacian(mu * Cp / Pr, T)

Question #1: is this the only way to include them in a conservative form of N-S equations?

The computation of a bluff body at Mach 15 is performed easily, and a grid-independent solution is reached. On the other hand, a flat-plate parallel to the flow (Mach 9.9) shows instabilities at the first cells as soon as the grid is refined (gradients are sharper).
I have also tried to increase the nOuterCorrectors and nCorrectors but the solution diverges within the timestep!

Question #2: any idea (or reference) about how to solve the problem?

Question #3: have you references where I can get a description of the multivariateGaussConvectionScheme? I would like to know how it works and why it is used in this solver...
didomenico is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
SonicTurbFoam Vs rhopSonicFoam vishal OpenFOAM Running, Solving & CFD 0 January 29, 2009 01:58
Canbt run rhopSonicFoam from the tutorials for version 13 rinaoldek OpenFOAM Running, Solving & CFD 0 January 11, 2009 05:06
How do about total temperature BC in rhopSonicFoam yijin_li OpenFOAM Running, Solving & CFD 0 December 3, 2008 02:34
RhopSonicFoam reference abhishek OpenFOAM Running, Solving & CFD 0 November 5, 2006 23:43
RhopSonicFoam didomenico OpenFOAM Running, Solving & CFD 0 October 3, 2005 10:53

All times are GMT -4. The time now is 18:48.