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FEM discretisation for eps-equation

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Old   September 20, 2000, 22:13
Default FEM discretisation for eps-equation
  #1
Sigit
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Does anyone know , how to make discretisation for eps-equation (in k-eps Turbulence Model) using FEM Standard Galerkin ?

Thanks for your help,

Sigit
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Old   September 26, 2000, 03:18
Default Re: FEM discretisation for eps-equation
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sylvain
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If the k equation is :

Dk/Dt = P_k - e + div(nu+nu_t/sigma_k)grad k

and the epilson equation is :

De/Dt = c_e1 P_k - c_e2 e^2/k + div(nu+nu_t/sigma_e)grad e

one can write the two equations in a similar form :

for k :

(D/Dt - div(nu+nu_t/sigma_k)grad + e/k ) k = P_k

for e :

(D/Dt - div(nu+nu_t/sigma_e)grad + c_e2 e/k ) e = c_e1 P_k e/k

they can be discretize the same way using the weak formulation and the galerkin decomposition.

Note that it is easier to considere the ration e/k constant by element in each term.
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Old   September 26, 2000, 23:19
Default Re: FEM discretisation for eps-equation
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Sigit
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Hi...sylvain !! Thank you for your advice. It's really useful for me.

Sigit
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Old   October 26, 2000, 11:49
Default Re: FEM discretisation for eps-equation
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Jas
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