continue with a finer grid? DES

Holli · December 2, 2009, 05:21

Hello everyone,

i have a question. Is it right that it is not allowed to interpolate a solution of a DES from a coarse to a fine grid and than continue to solve.

Thanks for your help.

harishg · December 7, 2009, 15:03

I am not sure where you heard it. I have used such interpolation for performing calculations and did not notice any problems. However, I have heard that using delayed DES introduces a dependence on the initial condition and not the original DES. Check the paper by Frohlich and Von Terzi in Progress in Aerospace Sciences.

Holli · December 7, 2009, 15:44

Thank you. I heard it in school from a fellow student and just wanted to be sure that I don't make any mistake.

December 2, 2009, 05:21	continue with a finer grid? DES	#1
Holli New Member Join Date: Nov 2009 Location: Germany Posts: 3 Rep Power: 16	Hello everyone, i have a question. Is it right that it is not allowed to interpolate a solution of a DES from a coarse to a fine grid and than continue to solve. Thanks for your help.

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December 7, 2009, 15:03		#2
harishg Senior Member N/A Join Date: Mar 2009 Posts: 189 Rep Power: 17	I am not sure where you heard it. I have used such interpolation for performing calculations and did not notice any problems. However, I have heard that using delayed DES introduces a dependence on the initial condition and not the original DES. Check the paper by Frohlich and Von Terzi in Progress in Aerospace Sciences.

December 7, 2009, 15:44		#3
Holli New Member Join Date: Nov 2009 Location: Germany Posts: 3 Rep Power: 16	Thank you. I heard it in school from a fellow student and just wanted to be sure that I don't make any mistake.