[arunraj]

Hello everyone, I have created a RGP table for water that i want to use in pipe flow simulation. Can someone tell the exact steps to be followed for using the RGP table to define the fluid material properties..

[blinkman]

if you are using CFX-pre2024,you can generate rgp files through Tools-generate rgp files.
You can also create RGP table files from the NIST REFPROP material properties using the RGP Generator command line tool.
%AWP_ROOT231%\SystemCoupling\bin\systemcoupling.ba t
Below is a typical example of commands for generating an RGP file:
import pyExt.RefProp as arp
fluidsPath = arp.getFluidsPath()
mat = arp.RefPropLib()
fluidList = ['fluids/water.fld']
mat.setup(fluidsPath, fluidList)
interpError = 1.0e-3
Tmin = 300.0
Tmax = 700.0
Pmin = 100000.0
Pmax = 25000000.0
# Generate both the liquid and vapor components, independent settings possible
h2ollow = arp.RGPLiquid("H2OL", Tmin, Tmax, Pmin, Pmax, interpError)
h2ovlow = arp.RGPVapor("H2OV", Tmin, Tmax, Pmin, Pmax, interpError)
arp.generateRGPfile("H2O-low.rgp", h2ollow, h2ovlow)

[arunraj]

Dear blinkman,

Thank you. I am using. However, in my case, it has failed by SHOWING UPPER LIMIT ERROR. I tried hard but eventually gave up. Though I believe the code is working properly.