|November 29, 2011, 06:36||
under relaxation factors
Join Date: Aug 2009
Posts: 67Rep Power: 9
I simulate a hydrofoil under non-cavitating conditions using Flunet.
The under-relaxation factors that i use are:
body forces 1
turbulent kinetic energy 0.8
turbulent dissipation rate 0.8
turbulent viscosity 1
Also i use Simple algorithm and k-ε standard
I want to converge Cl and Cd. After a great number of iterations Cd and Cl change value every ten iterations. If i change the under-relaxation factors
and define all of them with the value 0.01, i see that Cd and Cl dont change any more!
Is that right movement? I change under-relaxation factors and i have convergence?
|November 29, 2011, 06:57||
Join Date: May 2011
Posts: 120Rep Power: 7
you have to use URF when your work cant be converged.
if your simulations isnt so complex that it has transient behaviour, u dont need to modify URF.
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