Add time-vary & spatially varying body force for MMC simulations

[lawrenceccheung]

Is this feature request related to a problem? Please describe.

For MMC coupled wind farm simulations, we need to add a body force which varies in both z and in time. The body forces are derived from the ABLMesoscaleForcing and are horizontally homogeneous. This feature was alluded to in #1022 and #1025, and would generalize the capabilities currently available.

Describe the preferred solution

One possibility is to have the body forces be read from the abl stats netcdf file directly, which would avoid any reformatting of data (the abl stats file contains abl_meso_forcing_mom_x and abl_meso_forcing_mom_y which is what we want).

The same body forcing term would be necessary for the temperature equation here: https://github.com/Exawind/amr-wind/blob/main/amr-wind/equation_systems/temperature/source_terms/BodyForce.cpp.

Additional context

This capability is/will be necessary for FLOWMAS, AWAKEN, and other such projects.

[github-actions]

This issue is stale because it has been open 30 days with no activity.

[ewquon]

Hi all, is anyone actively looking to implement this? Didn't realize this capability wasn't in the code yet. I also need to be able to apply momentum/temperature source terms that are time and height varying. Thanks

[marchdf]

I don't know that anyone is actively implementing this feature. Do you want to take a stab? Happy to discuss but I think you implemented the first part of this so you probably know more than I do ;)