Learning Forum

[alessandra.corvo]

I'm running Fluent CFD simulations with a moving mesh on a cluster. The simulation works perfectly on my PC by executing the UDFs (Function Hood+Execute on demand) and then defining the dynamic mesh. When I try to run the simulation on the cluster, I get a message of negative volume because it just reads the position of the first node of my model and it never really executes the udf to update the position of the nodes, even if I try to use just 1 core to avoid parallelization issues. Do you know if there is maybe a specific command to execute the udf correctly or it could be related to different Fluent version on my PC and on the cluster? It seems it does not really execute the udf.

[Rob]

Did you compile the code on the cluster and check it was hooked correctly. Changing OS requires the library to be recompiled, and depending on the model and paths settings Fluent can save the absolute rather than local path in some panels.