CFD Online Discussion Forums - Entries for October 14, 2016

A generalized thermal/dynamic wall function: Part 1

Posted October 14, 2016 at 12:27 by sbaffini (NuTBox)
Updated December 21, 2016 at 09:07 by sbaffini

In a previous post i wrote about an extension of the Reichardt law of the wall to pressure gradient effects. That was derived by assuming the Reichardt profile as a solution for the case without pressure gradient and using integration by parts. In particular, given the the Reichardt function (

is the Von Karman constant):

$f^+\left(y^+\right) = \frac{1}{k}\log\left(1+ky^+\right) +A\left(1-e^{-\frac{y^+}{B}}-\frac{y^+}{B}e^{-\frac{y^+}{C}}\right)$

with:
...

sbaffini

Senior Member

Posted in Basic Fluid Mechanics and CFD

Views 2196 Comments 0 sbaffini is offline

pimpleFoam vs simpleFoam vs pisoFoam vs icoFoam?

Posted October 14, 2016 at 11:27 by kindle
Updated October 24, 2016 at 11:37 by kindle

Quite confusing sometime !

But, why is that a problem needs boundary condition for U and p and all the other possible variables?

pisoFoam has relaxation coef while icoFoam does not have this.

Quote:

UEqn.relax();

Quote:

Originally Posted by ata

Hi
icoFoam is transient solver for incompressible, laminar flow of Newtonian fluids.

pimpleFoam is large time-step transient solver for incompressible, flow using the PIMPLE(merged PISO-SIMPLE) algorithm.

...

kindle

New Member

Posted in Solver

Views 1448 Comments 0 kindle is offline

Viscoelastic Fluid Flows using OpenFOAM The solver viscoelasticFluidFoam

Posted October 14, 2016 at 11:27 by kindle

This guy use Openfoam and FENE-P !!!

Quote:

Originally Posted by mmasoudian

Dear ata
I appreciate your quick answer

I compiled everything and I changed fvSolutions as you mentioned in forum but when I want to run a case (FENE-P): the error is:

mam@ubuntu:~/OpenFOAM/mam-2.0.0/RUN/tutorials/incompressible/viscoelasticFluidFoam/FENE-P$ viscoelasticFluidFoam
/*---------------------------------------------------------------------------*\
| ========= |

...

kindle

New Member

Posted in Viscoelastic

Views 715 Comments 0 kindle is offline

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