Error in scalar transport
Posted: Thu Sep 22, 2022 11:52 am
Hello,
I am using Ver6 and running simulations in Ubunts18.
Here you can get some files for computation (run solver log and compile ...)
https://filesender.renater.fr/?s=downlo ... 1e150ac278
Now I run simulations for scalar transport.
The procedure of my simulation is
1. URANS for flow until 3000step with dt=0.1s and calculate an average flow field
2. WIth a user subroutine, I replace an instantaneous flow field at the last time step with the average flow field.
3. Activate option: "calculate on frozen velocity field"
4. Based on 3 and 4, run a simulation for scalar transport.
But now, there is some kind of strange behavior.
Would you check this animation with each 500steps?
https://filesender.renater.fr/?s=downlo ... 8b6bb2e369
As you can see, after a few moments, some areas have no scalar sources and no values.
I put many scalar sources in the domain. Now it is 40 sources.
When I re-run a simulation again with 3 sources, it worked very well.
Do you think this error comes from mesh or my mistakes in the setting?
In the past, I faced the same problem. At that time, the error happened because I impose the Dirichlet scalar value at an inlet, and also scalar sources in the domain. So error came from the inlet domain.
Best regards,
Hamada
I am using Ver6 and running simulations in Ubunts18.
Here you can get some files for computation (run solver log and compile ...)
https://filesender.renater.fr/?s=downlo ... 1e150ac278
Now I run simulations for scalar transport.
The procedure of my simulation is
1. URANS for flow until 3000step with dt=0.1s and calculate an average flow field
2. WIth a user subroutine, I replace an instantaneous flow field at the last time step with the average flow field.
3. Activate option: "calculate on frozen velocity field"
4. Based on 3 and 4, run a simulation for scalar transport.
But now, there is some kind of strange behavior.
Would you check this animation with each 500steps?
https://filesender.renater.fr/?s=downlo ... 8b6bb2e369
As you can see, after a few moments, some areas have no scalar sources and no values.
I put many scalar sources in the domain. Now it is 40 sources.
When I re-run a simulation again with 3 sources, it worked very well.
Do you think this error comes from mesh or my mistakes in the setting?
In the past, I faced the same problem. At that time, the error happened because I impose the Dirichlet scalar value at an inlet, and also scalar sources in the domain. So error came from the inlet domain.
Best regards,
Hamada