March 22, 2022 at 8:59 pmMontaSubscriber
I am trying to run a simulation (transient flow) on a HPC-System. Fluent is supposed to read a case and data then run a calculation, for which I define time step, number of time steps & number of iter/time-step. The input Journal looks like:
solve/dual-time-iterate 1000 100
In the output file the only problem is with the 2 command lines:
solve/dual-time-iterate 1000 100
since I get for both the error:
Error: = (equal): invalid argument : wrong type [not a number]
Error Object: #f
Reading & writing case & data files are totally fine! There is no problem.
I searched in Internet & in many documentations are the two command lines used. So here is my question are the command lines to run transient simulation correct?
Thanks for the help!
Monta.March 22, 2022 at 10:07 pmDrAmineAnsys EmployeeIf you open Fluent interactive mode you might test the commands and check if they are working
March 22, 2022 at 10:10 pmMarch 22, 2022 at 10:10 pmDrAmineAnsys EmployeeAlways record journal files first by trying different commands interactively
March 23, 2022 at 6:59 amMontaSubscriberSo trying the command line solve/dual-time-iterate interactively worked. That's why I am asking why did this one command line cause a problem in batch mode while starting the simulation on HPC-System.
March 23, 2022 at 2:06 pmMontaSubscriberAn update to what I tried to figure out the problem. I opened the case & then the data file in Fluent interactively on the cluster. I tried to run the simulation through the GUI and through TUI to see if the problem only occrus when Fluent reads the journal in batch mode. I get the same problem ( see the Foto)
Maybe there is someone here who already had experience with such erros and can guess what can cause it.
Remark: The case and data files were generated by Fluent 2021R2 & here I am trying to continue the simulation in HPC system with Fluent 2020R2 ( only available).
March 23, 2022 at 3:45 pmDrAmineAnsys EmployeeSo step back: When are you starting getting that error message? After reading the case?
Please use the full command as follows /solve/dual-time-iterate 1 100
March 24, 2022 at 6:23 amMontaSubscriberProblem solved! It is apparently so: I prepared my case locally with fluent 2021R2 and generated initial data for the hpc simulation. On the HPC-System is only fluent 2020R2 so far available. So running the simulation on a earlier version causes this error! This leads me now to the next question:
why I cannot carry on a simulation with 2020R2, which already been created and run in 2021R2?
Is there a way to adapt the simulation to the earlier version or solve this issue?
March 24, 2022 at 10:02 amDrAmineAnsys Employee1/You should be able to do that. But you cannot run a case built up in newer version in an older version: that will generally result in issues ( that is what you wrote you prepare in 2021r2 and want to run in 2020r2).
2/I always recommend to create a journal which reads the mesh, setup the case and then run it. This should be release agnostic as much as possible: it will also contain a line telling Fluent which TUI version to be used.
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