[kahjoonyong]

Hello,

I am currently running a simulation using AMR. Previously I had a problem with the subgrid scale criteria for velocity and temperature to trigger the AMR which is related to this post: How to apply AMR settings

Yijin Mao had advised me to include 2 outputs as passives which are vel_sgs and temp_sgs to determine the subgrid scale variables to be applied in the AMR settings.

Recently I found out that the simulation results varies as I decrease the subgrid scale temperature from for instance 0.1K to 0.02K. When I checked the temp_sgs output, the mean value (TEMP_SGS_MEAN) is around 1E-4, whereas the value for TEMP_SGS is around 5E-7, and the TEMP_SGS_StdDev is around 5E-3.

This makes me wonder what those values actually mean and how can I make you of those values to determine the AMR settings. More importantly why do those 3 values vary from each other so differently.

Any clarification is very appreciated. Thank you very much.

Regards,

Kah Joon Yong