IAPWS backward equations
 

Hi everyone!

Looking through the forum titles I couldn't find a better place to put this question, so I'm going to ask here. If it should be somewhere else, let me know and I'll move it.

Does anyone know where I can find the IAPWS supplementary backward equations that are functions of

1. Temperature and enthalpy; f(T,h) and
2.Temperature and entropy; f(T,s).

Thanks in advance!

Anyone have any idea?

because of the non-linearity of relations, I believe that no such equations can exist.
I had the same problem for my two phase code. I used some iterative method to solve the problem. But the computational cost is really annoying.

Yeah, that's why we want to find the backwards equations. We have found a number of the other backwards equations just looking through the ASME website at other publications, but the aforementioned ones eluded us. Thanks for the reply!