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How to set up BCs for k epsilon model

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Old   February 5, 2014, 09:33
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Mehdi GHOZALI
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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
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Old   February 5, 2014, 09:54
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Mihai Pruna
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Here's some issues people have helped me with for internal flow:
http://www.cfd-online.com/Forums/ope...ty-driven.html
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Old   October 19, 2015, 17:25
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Fei
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Quote:
Originally Posted by nileshjrane View Post
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"
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Old   October 26, 2015, 09:58
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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.
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Old   October 26, 2015, 10:23
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Thanks a lot, that helps!
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boundary conditions, eps, epsilon, initiallisation, turbulence


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