[m_ridzon]

I'm new to using NIST RGP tables in Fluent. According to Fluent Help, I can run the following BAT file to create the RGP file.

%AWP_ROOT212%\SystemCoupling\bin\systemcoupling.bat

I then issue the following commands.

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 just the vapor component in the RGP file, for entire range
h2ovapor = arp.RGPVapor("H2OV", interpError)
arp.generateRGPfile("H2O-vapor.rgp", h2ovapor)

The last line looks like it is creating a RGP file. Where is this stored in the file directory? I'd like to open it for review.

[Carnot]

In Python, type

-------------------

import os

if __name__ == '__main__':
os.system(r'"C:\Program Files\ANSYS Inc\ANSYS Student\v211\SystemCoupling\bin\systemcoupling.bat "')

-------------------

Here, change into your directory for systemcouling.bat.

then type

-------------------

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 just the vapor component in the RGP file, for entire range
h2ovapor = arp.RGPVapor("H2OV", interpError)
arp.generateRGPfile("H2O-vapor.rgp", h2ovapor)

-------------------

after then, type

-------------------

import os

path=os.getcwd()
print(path)

-------------------

You can find the directory for rgp files made.
In my case, they were hidden.

[m_ridzon]

Originally Posted by Carnot

In Python, type

-------------------

import os

if __name__ == '__main__':
os.system(r'"C:\Program Files\ANSYS Inc\ANSYS Student\v211\SystemCoupling\bin\systemcoupling.bat "')

-------------------

Here, change into your directory for systemcouling.bat.

then type

-------------------

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 just the vapor component in the RGP file, for entire range
h2ovapor = arp.RGPVapor("H2OV", interpError)
arp.generateRGPfile("H2O-vapor.rgp", h2ovapor)

-------------------

after then, type

-------------------

import os

path=os.getcwd()
print(path)

-------------------

You can find the directory for rgp files made.
In my case, they were hidden.

Unfortunately, I don't have Python installed. I typically do all of the work in the Fluent Console. How should I revise these commands you gave, to use in the Fluent Console?

[Bak16]

Did you manage to do it eventually? If so, how?
Thank you

[Tony12]

This is the process to generate the RGP file using an Ansys python script:

Step 1: open CMD and change directory to where you want the files stored

cd C:\Users\username\Desktop\RGP_files

Step 2: run the systemcoupling.bat script (the example below is for version 23R1)

“C:\Program Files\ANSYS Inc\v231\SystemCoupling\bin\systemcoupling.bat”

Step 3: Copy/paste python script (this one generates the RGP file for water and vapor). You only need to choose one of the options below:

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

# Option 1: 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)

# Option 2: Generate both the liquid and vapor components in the RGP file in one go
h2omed = arp.RGPSettings("H2O", Tmin, Tmax, Pmin, Pmax, interpError , arp.ADAPT_AUTO_TP)
arp.generateRGPfile("H2O-med.rgp", h2omed)

# Option 3: Generate just the vapor component in the RGP file, for entire range
h2ovapor = arp.RGPVapor("H2OV", interpError)
arp.generateRGPfile("H2O-vapor.rgp", h2ovapor)