|December 27, 2013, 01:56||
Meaning of non-physical points ...
Join Date: Nov 2009
Posts: 12Rep Power: 6
I had few queries regarding SU2 terminology.
1. Several times I encounter this msg: The solution contains n non-physical points. What does this refer to ?
2. How are the residuals defined? Lets say the value at some iteration for variable 1 is -3.4567. What does it indicate? Does it mean log_10 (Var1_i iter/ Var1_ i-1 iter)?
3. Has anyone tried using 2 level Multigrid? How to decide optimal child/parent ratio for a given grid?
Would appreciate your response.
|January 11, 2014, 22:05||
Join Date: Jan 2013
Location: Stanford, CA
Posts: 152Rep Power: 3
Non-physical points means that after the solution update the density is negative.
Su2 computed the L2 norm of the residual and plots the Log10 of the value. In other words a value of -12 means that the residual is 10^-12.
To set the optimal parameters of the MG is an art. when you have convergence issues do not forget to reduce:
% Damping factor for the residual restriction
% Damping factor for the correction prolongation
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