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[CFX] Set convergence level for additional variable |
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December 14, 2010, 08:24 |
[CFX] Set convergence level for additional variable
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#1 |
Senior Member
Lance
Join Date: Mar 2009
Posts: 669
Rep Power: 22 |
Hi,
Im running LES and have set my convergence level to 1e-6 which the solver reaches within a couple iterations. However, I have an additional variable and it takes about 10-15 iterations per time step for it to reach 1e-6. So, in order to speed up my simulation, I want to set a lower convergence level for the additional variable. Is that possible? I know that Fluent has the option to specify convergence level on each equation, it would be great if CFX also had that option. |
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December 15, 2010, 08:22 |
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#2 |
Senior Member
Lance
Join Date: Mar 2009
Posts: 669
Rep Power: 22 |
Update:
got some help from support, and yes, its possible to have different convergence criteria for AVs. Just edit the CCL like: Code:
FLOW: Flow Analysis 1 SOLVER CONTROL: Turbulence Numerics = First Order ADVECTION SCHEME: Option = High Resolution END CONVERGENCE CONTROL: Maximum Number of Coefficient Loops = 10 Minimum Number of Coefficient Loops = 1 Timescale Control = Coefficient Loops END CONVERGENCE CRITERIA: Residual Target = 1.E-6 Residual Type = RMS END EQUATION CLASS: av ADVECTION SCHEME: Option = High Resolution END CONVERGENCE CRITERIA: Residual Target = 1.E-3 Residual Type = RMS END TRANSIENT SCHEME: Option = Second Order Backward Euler END END TRANSIENT SCHEME: Option = Second Order Backward Euler TIMESTEP INITIALISATION: Option = Automatic END END END END |
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