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CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)
-   OpenFOAM Pre-Processing (https://www.cfd-online.com/Forums/openfoam-pre-processing/)
-   -   How to set up BCs for k epsilon model (https://www.cfd-online.com/Forums/openfoam-pre-processing/64634-how-set-up-bcs-k-epsilon-model.html)

Dadou February 5, 2014 08:33
Yes I did type uniform in the input file.

for the free surface I kind figure it out.

I'm gonna try and find something about the kOmega model, do you have any link that I can start with ?

Thank you for your help

mihaipruna February 5, 2014 08:54
Here's some issues people have helped me with for internal flow:
http://www.cfd-online.com/Forums/ope...ty-driven.html

Garfield October 19, 2015 16:25
value
 
Quote:
Originally Posted by nileshjrane (Post 274546)
Put this in "/0/k" file for inlet. 0.05 corresponds to 5%. The value is actual value of k that you can calculate from 5% Turb intensity. I am not sure whether it is significant or nor, but i think its better to use appropriate value nevertheless.

Code:
    inlet
    {
        type            turbulentIntensityKineticEnergyInlet;
        intensity      0.05;
        value          uniform 60;
    }
Hi, do you know how to calculate the initial value? here you make the initial value to be "uniform 60"

vineet_bhola October 26, 2015 08:58
If you know approximate values of average velocity OR some Initial guess/rough calculations, you can use the formulae below for k and Epsilon.

http://www.cfd-online.com/Wiki/Turbu...ary_conditions

Hope that helps.
Vineet

Garfield October 26, 2015 09:23
Thanks a lot
 
Thanks a lot, that helps!


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