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Additional terms in N-S equs

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Old   April 28, 2010, 08:14
Default Additional terms in N-S equs
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Reza
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Hi

I am working with 2phase solid-gas flow and I want to add a term to N-S equations as follows:

div(rhos*epsilons*Us*Us) = -epsilons*grad(p) - beta*(Us-Ug) + div(taus) + rhos*epsilons*g

as you can see I have two additional terms in N-S equs as beta*(Us-Ug) and div(taus). beta in the first term is the momentum transfer, taus is the stress tensor and epsilons is the volume fraction of solid phase.

I am wondering how I can add these terms to N-S equs in PHOENICS. mostly the term beta*(Us-Ug) is a simple argument and must be very easy to add but I do not know how and I would appreciate if anyone can help me with this.
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Old   May 10, 2010, 04:44
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Mominul MuKuT
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Have you use sample q1 file that is given to phonics library or develop q1 for solving N-S eqn. personally?
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Old   May 10, 2010, 05:08
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I did not understand exactly what u mean by sample q1 in phoenics lib or developed q1 file. I am using q1 file generated by phoenics through VR and I want to know how to add these term using probably SOURCE in ground file.
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Old   May 10, 2010, 05:23
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Quote:
Originally Posted by safavinick_reza View Post
I did not understand exactly what u mean by sample q1 in phoenics lib or developed q1 file. I am using q1 file generated by phoenics through VR and I want to know how to add these term using probably SOURCE in ground file.
In the phoenics directory (..../d_earth/....) there are lot of example of various phenomena. You can check there.
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