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How do I have to calculate Epsilon in a k-epsilon turbulent model.

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Old   May 5, 2016, 05:45
Default How do I have to calculate Epsilon in a k-epsilon turbulent model.
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miguelangel
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Hi,

I have to use this kind of turbulence model, but I have doubts in the way to inizialitze epsilon. I use this formula: eps= 0.09 * ką'⁵ / L; where L is the lenght of the turbulence, I've supposed that is the diameter of my study problem, an injector nozzle.

When I do this, it figures a number, but when I run the simulation the results are 4 orders of magnitud higher.

This is my problem.

Thank you
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Old   May 6, 2016, 08:11
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Joachim Herb
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Are you looking for these?
http://www.cfd-online.com/Wiki/Turbu...ary_conditions
http://www.cfd-online.com/Tools/turbulence.php
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