|May 26, 2015, 09:07||
Join Date: May 2015
Posts: 1Rep Power: 0
at the inlet there is the turbulent inlet boundary condition.
Now I like to calculate/measure the intensity at L/4, L/2, 3L/4 and L (L = length of the pipe).
Could you give me a tip?
|May 27, 2015, 06:41||
Join Date: Sep 2014
Location: Pretoria, South Africa
Posts: 58Rep Power: 4
Do you know what equation you would like to use to calculate the turbulence intensity? I remember looking for it a while back but I could not figure out exactly what OpenFOAM uses. I am by no means a turbulence expert, but if you have an equation for it then I might be able to help you implement that in OpenFOAM. Have you looked at the sample utility? I have not used it myself yet.
|May 30, 2015, 12:36||
Join Date: Mar 2009
Location: Torino, Italy
Posts: 104Rep Power: 9
it really depends on what kind of turbulence modelling you are using. If you are using rans equations then you can choose different turbulence models, as k-eps, k-omega, etc. If you have k available in your turb model then you can calculate turb intensity by deriving if from k value, because k is turbulence kinetic energy and it's directly linkend to turb intensity.
You can sample the k value where you want using the "sample" utility with a sampleDict.
If otherwise you are doing Les, you have turb components of velocities, therefore you can directly calculate turb intensity.
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