Hello,
I am trying to apply the submodelling approach but defining the heat flux as boundary conditions. I know that I will have to modify the source code to add this possibility to the cflux card, but my question is related to the .frd file. I am trying to imitate the CLOAD implementation for the submodel capability, so I would first do a submodel simulation using the temperature as the bc and then use the results of the heat flux of this first local simulation for the second one.
Is it ok if I use the NODE FILE card with the RFL option to get the total heat flux at the nodes? Because I have been trying to use the EL FILE card with the HFL option but it gives me 3 values per node which I assume are the coordinates for the heat flux vector and I am having trouble mapping that to each node for the second local simulation as I only have the 11 Dof related to temperature.
HFL is integration point variable (heat flux per unit area vector components) extrapolated and averaged at nodes in the .frd file (you can get the integration point values with *EL PRINT).
RFL stands for total flux (external concentrated heat sources) at a node. Just like with RF (reaction force in mechanical analyses), this includes both applied and reaction fluxes.
Then, if i understood correctly, as i want to apply the concentrated heat flux at each node belonging to the boundary of my model y should use the RFL option, right?
Only if you don’t mind that RFL gives you the sum of the reaction fluxes and the loading fluxes.
Great! Thank you for you help