# CFLUX Submodeling

**URL:** <https://calculix.discourse.group/t/cflux-submodeling/2659>\
**Category:** Uncategorized\
**Created:** [April 2, 2025, 12:29pm UTC](https://calculix.discourse.group/t/cflux-submodeling/2659 "2025-04-02T12:29:52Z")\
**Posts on this page:** 1\
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**Author:** ![Calc\_em](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@Calc\_em](https://calculix.discourse.group/u/Calc_em)\
**Post date:** [April 2, 2025, 12:53pm UTC](https://calculix.discourse.group/t/cflux-submodeling/2659/2 "2025-04-02T12:53:29Z")

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> [@FranSordoni](#):
>
> 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.

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