under relaxation factors
Hi everyone,
I simulate a hydrofoil under non-cavitating conditions using Flunet. The under-relaxation factors that i use are: pressure 0.8 density 1 body forces 1 momentum 0.2 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? Thanks, spk |
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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