CFD Online Discussion Forums

Point data -> Cell data

Posted October 26, 2016 at 11:00 by kindle
Updated November 14, 2016 at 13:33 by kindle

Get cell data from paraview

Quote:

Originally Posted by wyldckat

Greetings Philipp,

Took me a while to think about this, but I believe I know what you're looking for. The steps should be as follows:

Apply the "Slice" filter, along the direction of your original line.
Apply a second "Slice" filter, applied to the first one, along the location of the intended line.
You should now have the same line you originally intended, but with some extra information that the "Plot over

...

kindle

New Member

Posted in Post-processing

Views 1456 Comments 0 kindle is offline

non-uniform boundray condition - solution dynamicCode

Posted October 25, 2016 at 05:12 by kindle
Updated October 25, 2016 at 05:14 by kindle (::pow give a smile face)

Modifying the file 0/U the /incompressible/icoFoam/cavity tutorial.

FoamFile
{
version 2.0;
format ascii;
class volVectorField;
object U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions [0 1 -1 0 0 0 0];

internalField uniform (0 0 0);

boundaryField
{
movingWall
{
type ...

kindle

New Member

Posted in Pre-processing

Views 1086 Comments 0 kindle is offline

Detached-Eddy Simulation (DES) models in OpenFOAM

Posted October 23, 2016 at 11:03 by fumiya

Detached-Eddy Simulation (DES) is a hybrid Reynolds Averaged Navier-Stokes (RANS)/Large-Eddy Simulation (LES) model.
The DES model was first proposed in 1997 by Spalart et al. [1] based on the Spalart-Allmaras RANS model and
it is commonly referred to as DES97.

I've summarized DES models available in OpenFOAM in the following post:
http://caefn.com/openfoam_turbulence_model_hybrid/

[1] P. R. Spalart, W.-H. Jou, M. Strelets and S. R. Allmaras,...

fumiya

Senior Member

Posted in Uncategorized

Views 2917 Comments 1 fumiya is offline

A generalized thermal/dynamic wall function: Part 3

Posted October 17, 2016 at 12:25 by sbaffini (NuTBox)
Updated November 18, 2018 at 06:57 by sbaffini

In this post i summarize the initial problem and the procedure to determine the wall function value (i.e., the solution) for given

and

.

We looked for a solution $T^+\left(y^+,F_T^+,Pr,Pr_t\right)$ to the problem:

$\frac{dT^+}{dy^+}=\frac{Pr\left(1+F_T^+y^+\right)}{\left[1+\left(\frac{Pr}{Pr_t}\right)\left(\frac{\mu_t}{\mu}\right)\right]}$

with:

$\frac{\mu_t}{\mu}=\frac{\left(ky^+\right)^3}{\left(ky^+\right)^2+\left(ka_0\right)^3-\left(ka_0\right)^2}$ ...

Attached Files

wallfn.txt (2.2 KB, 597 views)

sbaffini

Senior Member

Posted in Basic Fluid Mechanics and CFD

Views 1884 Comments 0 sbaffini is offline

A generalized thermal/dynamic wall function: Part 2

Posted October 17, 2016 at 09:24 by sbaffini (NuTBox)
Updated April 28, 2022 at 08:50 by sbaffini

In the first part of this post we left with the problem of computing the following integral:

$f^+\left(y^+,\frac{Pr}{Pr_t}\right)=\int_0^{y+}{\frac{1}{\left[1+\left(\frac{Pr}{Pr_t}\right)\left(\frac{\mu_t}{\mu}\right)\right]}dz^+}$

with:

$\frac{\mu_t}{\mu}\left(y^+,a,k\right)=\frac{\left(ky^+\right)^3}{\left(ky^+\right)^2+\left(ka\right)^3-\left(ka\right)^2}$

I added all the explicit functional dependencies here because we know $f^+\left(y^+,1\right)$ ...

sbaffini

Senior Member

Posted in Basic Fluid Mechanics and CFD

Views 1931 Comments 0 sbaffini is offline