Tabular backend with DmassUmass input for CFD applications

[GiuSirianni]

Hello,

I am using CoolProp in a couple of different CFD codes of mine and its been a great companion up to now.

Recently, i have started looking into look-up tables for computational time comparison reasons. As many of you might know, CFD applications usually use density and internal energy to compute the thermodynamic state, but the tabular backend of CoolProp does not allow for these inputs.

I have been searching around for a reason on why this might be, but am unable to find one since many CFD codes are using look-up tables without a problem (usually in the non-ideal gas-dynamics field).

I saw there is a pull request january 2022 that never got accepted. Is there a reason for it?

Thank you in advance.

[ibell]

CoolProp does not include UD inputs because UD create an domain for tabulation that is difficult to turn into a rectangular domain, which is required for the tabular methods in their current form.

[GiuSirianni]

Understood. I have been using with reliable results the UD tabular implementation from @joel-martin (#2077). I didn't test it thoroughly, but it has been working for me.

[ibell]

Glad to hear it. I have not merged that PR because it only offers partial coverage of the phase diagram, while I think we need a more robust method be merged in CoolProp