Initialise RSM using SST K-Omega Precursor Simulation

sr786 · December 1, 2023, 06:27

Hi,

I am running a steady state case for single phase flow (water) in a stirred tank reactor (no baffles) agitated by a magnetic rod stirrer lying on the reactor base. The top of the tank is open (slip BC).

I have managed to perform a run using two equation model (SST K-Omega) and the results are well converged and the simulation is nice and stable.

Now I want to use the SST K-Omega results to initialise an RSM run. I have already computed R (and epsilon) using the postProcess utility.

However, when I try to run RSM the simulation keeps blowing up within the first few iterations and I cannot understand why.

If anyone is experienced with running RSM in OpenFOAM could I please ask for your advice in set in RSM set-up as I am completely stuck.

dlahaye · December 1, 2023, 10:43

simpleFoam tutorial PitzDaily using Reynolds stress tensor (LRR RASModel)

Smaller relaxation factors?

December 1, 2023, 06:27	Initialise RSM using SST K-Omega Precursor Simulation	#1
sr786 Member sr786 Join Date: Jan 2023 Location: Leeds, UK Posts: 50 Rep Power: 3	Hi, I am running a steady state case for single phase flow (water) in a stirred tank reactor (no baffles) agitated by a magnetic rod stirrer lying on the reactor base. The top of the tank is open (slip BC). I have managed to perform a run using two equation model (SST K-Omega) and the results are well converged and the simulation is nice and stable. Now I want to use the SST K-Omega results to initialise an RSM run. I have already computed R (and epsilon) using the postProcess utility. However, when I try to run RSM the simulation keeps blowing up within the first few iterations and I cannot understand why. If anyone is experienced with running RSM in OpenFOAM could I please ask for your advice in set in RSM set-up as I am completely stuck.

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December 1, 2023, 10:43		#2
dlahaye Senior Member Domenico Lahaye Join Date: Dec 2013 Posts: 751 Blog Entries: 1 Rep Power: 17	simpleFoam tutorial PitzDaily using Reynolds stress tensor (LRR RASModel) Smaller relaxation factors?