[Rotidpor]

Hello foamers,


I have already used the BC : timeVaryingMappedFixedValue which is very practical for coupling models/scales. It allows a conservative coupling in both time and space.


But why is there not a timeVaryingMappedFixedGradient BC ? Is it more complicated than it looks, am I missing something trivial ?


A fixed gradient condition, mapped from another case, varying in time and space would be very practical...

[olesen]

Originally Posted by Rotidpor

Hello foamers,

I have already used the BC : timeVaryingMappedFixedValue which is very practical for coupling models/scales. It allows a conservative coupling in both time and space.

But why is there not a timeVaryingMappedFixedGradient BC ? Is it more complicated than it looks, am I missing something trivial ?

A fixed gradient condition, mapped from another case, varying in time and space would be very practical...

What about this?:
https://www.openfoam.com/documentati...d.html#details

[Rotidpor]

Well, thank you for your input but...

I don't really get what is happening in this mappedMixedField BC.


A bit more on the modeling I want to carry on :
I would like to combine heat and water evaporation/condensation fluxes at a given wall boundary (calculated for a given outdoors temperature/RH in several stationary calculations) into a single face normal magnitude gradient field (which is easily done in a terminal using awk sed and other things).

Then I want to map this custom surface field to another model/mesh as a fixed gradient. And of course, this field has to be interpolated at each timestep exactly like timeVaryingMappedFixedValue does for Dirichlet BCs...


For the moment, the only thing I can do is using uniformFixedGradient to interpolate between timesteps but I'm forced to use a uniform 'mean' field which is not nice as I'll lose all topological information and 3D effects.

[agustinvo]

Hi,



did you manage to imolement such a BC? I want to test something similar in OF7