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You have to implement it into your flow solver which is OpenFOAM in this topic. This should be easier than implementing a transition model.
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hi tue, thank you for you quick answer and sorry for my english! :)
ok, i use openfoam. i know that i can modify the solvers of the tutorials, and compile them. i want to use simplefoam. now my question is: which file (for example a header file) may i modify to impose that before the point of transition, the nut is zero, and after this point the value of nut is different for zero?? thank very much |
As I said before, I am not familiar with OpenFOAM so I cannot tell you where exactly you can make that modification. One way to do it is as follows: you should have a routine that compute an intermittent variable. This variable should be 0 in the laminar region that you prescribe and 1 elsewhere. Then you should look for the routine where the production of turbulence kinetic energy is computed (this production term is a source term so look for source terms). You can then simply multiply the intermittent variable to the production term. This means that there is no production of turbulence in the laminar region and thus the turbulent viscosity is null.
Implementing a transition model is an extension of the above procedure. You typically will need to implement transport equation(s) for the intermittent variable based on physical arguments and empiricism. |
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Hi everybody. How can I have the paper ?Do you have it? Can you please send it to me. Mohammad.moshfeghi@gmail.com I will be really grateful. |
Laminar to Turbulent case, not Transition
I have a laminar case of a Laminar flow over a cylinder. Can anyone guide me as to what are the files to add to make laminar flow to turbulent flow i.e., Turbulence Modeling!
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Laminar Turbulent Transition Model in OpenFOAM- kOmegaSSTLM
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http://www.openfoam.com/documentatio...8H_source.html https://turbmodels.larc.nasa.gov/lan...nter_4eqn.html Regards, Ronith Stanly |
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