Stopping and starting fluent corrected problem but I don't know how to reproduce it

cdixonm · June 3, 2016, 15:05

A case of the simulation I am working on was run and it was stopped and started twice. This is the only cause that produced the eddies we see in the experimental case. Does anybody know why this might happen? Do you know what changes in the program when you stop and restart?

We are using Fluent 16.2 and using the DES k omega SST solver.

Thank you
Campbell

Sparow89 · June 6, 2016, 14:06

I am also interested in this problem.

Far · June 6, 2016, 15:09

Quote:

Originally Posted by cdixonm

A case of the simulation I am working on was run and it was stopped and started twice. This is the only cause that produced the eddies we see in the experimental case. Does anybody know why this might happen? Do you know what changes in the program when you stop and restart?

We are using Fluent 16.2 and using the DES k omega SST solver.

Thank you
Campbell

May this has introduced some disturbance in flow. Make sure you run double precision solver and also check your mesh.

Sparow89 · June 7, 2016, 17:54

For my case (self-oscillating cavity flow) I am using double precision and my mesh is less than y+=1 (about 6e-5). I have noticed that when I don't have a consistently oscillating flow regime I can stop and restart the simulation and it will then start behaving as expected. I had a monitor chart to show this, but I have misplaced it...

June 3, 2016, 15:05	Stopping and starting fluent corrected problem but I don't know how to reproduce it	#1
cdixonm New Member Campbell Join Date: Jun 2016 Location: Georiga Posts: 2 Rep Power: 0	A case of the simulation I am working on was run and it was stopped and started twice. This is the only cause that produced the eddies we see in the experimental case. Does anybody know why this might happen? Do you know what changes in the program when you stop and restart? We are using Fluent 16.2 and using the DES k omega SST solver. Thank you Campbell

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Sparow89 New Member Stephen Join Date: Jun 2016 Posts: 8 Rep Power: 10	For my case (self-oscillating cavity flow) I am using double precision and my mesh is less than y+=1 (about 6e-5). I have noticed that when I don't have a consistently oscillating flow regime I can stop and restart the simulation and it will then start behaving as expected. I had a monitor chart to show this, but I have misplaced it...