I have issues with the keyword $STORAGE
Googling it I can find that it enables to specify the storativity of a material i.e. the volumetric specific storage which is the volume of water that the aquifer releases from storage.
However, on an obscure site mirroring random internet pages, I can find a note:
“Attention: For liquid flow processes (LIQUID_FLOW), the model value is the specific storage divided by fluid density and gravity acceleration constant in Pa-1.” (I presume this page comes from ufz, but I am not sure).
Which makes sense, since the OpenGeoSys storativity has been defined as the volumetric specific storage. So I am asking to have confirmation: should I take the usual specific storage value available in table (i.e. a combination of fluid and solid component compressibility, for a poroelastic media) and divide it by fluid density and gravity?
I tried to scrub the source code but I could not really find a clarification.
Many thanks in anticipation,