How can model a real gas(not a perfect gas?)

immortality · June 23, 2013, 15:04

Hi
how can find out that perfect gas model is appropriate for one flow simulation
in the range of p and T after simulating by perfect gas?
is there a utility for calculating Z(compressibility factor) to figure out it?
is there any real gas thermoPhysical model in OF at all?what formula it uses?
which tutorial is there for this purpose?

Chris Lucas · June 24, 2013, 04:32

Hi,

have a look at my real gas branch in OpenFoam ext.

http://sourceforge.net/p/openfoam-ex...Thermo/~/tree/

Kind Regards,
Christian

immortality · June 24, 2013, 05:55

Hi Christian
thanks.but I couldn't find the related branch.even in search part.

Chris Lucas · June 24, 2013, 06:53

Hi,

the link above gives you the correct branch (fullyIntegratedRealGasThermo)

Christian

immortality · June 24, 2013, 08:02

thanks.how much is its volume for downloading?

wyldckat · June 24, 2013, 17:45

Greetings to all!

@Ehsan: If you still have got OpenFOAM 1.6-ext from the other installation you tried to make about a month or so ago, then you don't need to download anything, you only need to follow these steps:

Go into the folder where the source code for 1.6-ext is located:
Code:
```
cd ~/OpenFOAM/OpenFOAM-1.6-ext
```

Run the following command:

Code:

git checkout feature/fullyIntegratedRealGasThermo

Then you'll need to rebuild OpenFOAM 1.6-ext... but that depends on how you are keeping the versions separated. If you don't remember what I mean, read this blog post: Advanced tips for working with the OpenFOAM shell environment

Best regards,
Bruno

immortality · June 24, 2013, 18:22

Hi Bruno
thanks.then its in 1.6ext itself.I forgot about this version.
the second command gives this error in git:

Code:

ehsan@Ehsan-com:~/OpenFOAM/OpenFOAM-1.6-ext$ git checkout feature/fullyIntegratedRealGasThermo
fatal: Not a git repository (or any of the parent directories): .git

Chris Lucas · June 25, 2013, 07:53

Hi,

the git repo for OF ext has been changed. Use the following line to download OF ext
git clone git://openfoam-extend.git.sourceforge.net/gitroot/openfoam-extend/openfoam-extend OpenFOAM-1.6-ext
Don't forget to change the branch as stated above

Regards,
Christian

June 23, 2013, 15:04	How can model a real gas(not a perfect gas?)	#1
immortality Senior Member Ehsan Join Date: Oct 2012 Location: Iran Posts: 2,208 Rep Power: 27	Hi how can find out that perfect gas model is appropriate for one flow simulation in the range of p and T after simulating by perfect gas? is there a utility for calculating Z(compressibility factor) to figure out it? is there any real gas thermoPhysical model in OF at all?what formula it uses? which tutorial is there for this purpose? __________________ Injustice Anywhere is a Threat for Justice Everywhere.Martin Luther King. To Be or Not To Be,Thats the Question! The Only Stupid Question Is the One that Goes Unasked.

June 24, 2013, 04:32		#2
Chris Lucas Senior Member Christian Lucas Join Date: Aug 2009 Location: Braunschweig, Germany Posts: 202 Rep Power: 18	Hi, have a look at my real gas branch in OpenFoam ext. http://sourceforge.net/p/openfoam-ex...Thermo/~/tree/ Kind Regards, Christian immortality likes this.

June 24, 2013, 05:55		#3
immortality Senior Member Ehsan Join Date: Oct 2012 Location: Iran Posts: 2,208 Rep Power: 27	Hi Christian thanks.but I couldn't find the related branch.even in search part. __________________ Injustice Anywhere is a Threat for Justice Everywhere.Martin Luther King. To Be or Not To Be,Thats the Question! The Only Stupid Question Is the One that Goes Unasked.

June 24, 2013, 08:02		#5
immortality Senior Member Ehsan Join Date: Oct 2012 Location: Iran Posts: 2,208 Rep Power: 27	thanks.how much is its volume for downloading? __________________ Injustice Anywhere is a Threat for Justice Everywhere.Martin Luther King. To Be or Not To Be,Thats the Question! The Only Stupid Question Is the One that Goes Unasked.

June 24, 2013, 17:45		#6
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,982 Blog Entries: 45 Rep Power: 128	Greetings to all! @Ehsan: If you still have got OpenFOAM 1.6-ext from the other installation you tried to make about a month or so ago, then you don't need to download anything, you only need to follow these steps: Go into the folder where the source code for 1.6-ext is located: Code: cd ~/OpenFOAM/OpenFOAM-1.6-ext Run the following command: Code: git checkout feature/fullyIntegratedRealGasThermo Then you'll need to rebuild OpenFOAM 1.6-ext... but that depends on how you are keeping the versions separated. If you don't remember what I mean, read this blog post: Advanced tips for working with the OpenFOAM shell environment Best regards, Bruno immortality likes this. __________________ OpenFOAM: FAQ \| Getting started Forum: How to get help, to post code/output and forum guide Read this before sending me PM

June 24, 2013, 06:53		#4
Chris Lucas Senior Member Christian Lucas Join Date: Aug 2009 Location: Braunschweig, Germany Posts: 202 Rep Power: 18	Hi, the link above gives you the correct branch (fullyIntegratedRealGasThermo) Christian

June 24, 2013, 18:22		#7
immortality Senior Member Ehsan Join Date: Oct 2012 Location: Iran Posts: 2,208 Rep Power: 27	Hi Bruno thanks.then its in 1.6ext itself.I forgot about this version. the second command gives this error in git: Code: ehsan@Ehsan-com:~/OpenFOAM/OpenFOAM-1.6-ext$ git checkout feature/fullyIntegratedRealGasThermo fatal: Not a git repository (or any of the parent directories): .git __________________ Injustice Anywhere is a Threat for Justice Everywhere.Martin Luther King. To Be or Not To Be,Thats the Question! The Only Stupid Question Is the One that Goes Unasked.

June 25, 2013, 07:53		#8
Chris Lucas Senior Member Christian Lucas Join Date: Aug 2009 Location: Braunschweig, Germany Posts: 202 Rep Power: 18	Hi, the git repo for OF ext has been changed. Use the following line to download OF ext git clone git://openfoam-extend.git.sourceforge.net/gitroot/openfoam-extend/openfoam-extend OpenFOAM-1.6-ext Don't forget to change the branch as stated above Regards, Christian immortality likes this.

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