CFD post can not check mole fraction data of fluent?

Weiqiang Liu · May 29, 2020, 23:09

Hi all,

I am trying to import a fluent calculated results into CFD post. However, I can not find any mole fraction variables in CFD post. Anyway, I can find mass fraction variables in CFD post.

I am wondering is it because CFD post does not support mole fraction variables or I just did not notice this.

Best regards

Weiqiang

vinerm · May 30, 2020, 08:49

CFDPost does support mole fraction, however, not from standard Fluent data file. You will have to export .cdat files from Fluent with mole fraction as selected variable. Fluent does not save mole fraction values, rather calculates those on the basis of mass fractions and species' properties. Hence, those are not available in data file.

Weiqiang Liu · May 30, 2020, 09:05

Quote:

Originally Posted by vinerm

CFDPost does support mole fraction, however, not from standard Fluent data file. You will have to export .cdat files from Fluent with mole fraction as selected variable. Fluent does not save mole fraction values, rather calculates those on the basis of mass fractions and species' properties. Hence, those are not available in data file.

Hi,

I just tried your method by selecting mole fraction as variable and exporting cdat. File. Then in CFD post I can check mole fraction variable.

Thanks very much for your help!

Best regards

Weiqiang

May 29, 2020, 23:09	CFD post can not check mole fraction data of fluent?	#1
Weiqiang Liu Senior Member Weiqiang Liu Join Date: Feb 2018 Posts: 278 Rep Power: 9	Hi all, I am trying to import a fluent calculated results into CFD post. However, I can not find any mole fraction variables in CFD post. Anyway, I can find mass fraction variables in CFD post. I am wondering is it because CFD post does not support mole fraction variables or I just did not notice this. Best regards Weiqiang

May 30, 2020, 08:49	Mole Fractions	#2
vinerm Senior Member Vinerm Join Date: Jun 2009 Location: Nederland Posts: 2,946 Blog Entries: 1 Rep Power: 36	CFDPost does support mole fraction, however, not from standard Fluent data file. You will have to export .cdat files from Fluent with mole fraction as selected variable. Fluent does not save mole fraction values, rather calculates those on the basis of mass fractions and species' properties. Hence, those are not available in data file. jinpingxi likes this. __________________ Regards, Vinerm PM to be used if and only if you do not want something to be shared publicly. PM is considered to be of the least priority.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Exporting the data from surface in cfd post	RAJDEEP	CFX	2	December 5, 2019 04:20
"If" Statement in Fluent CFD Post Expressions?	danisnug	FLUENT	0	May 11, 2019 00:10
Error while reading CFD Post file exported from FLUENT	amjadfirst	FLUENT	0	September 3, 2016 20:25
CFD Online Celebrates 20 Years Online	jola	Site News & Announcements	22	January 31, 2015 01:30
Problem of simulating of small droplet with radius of 2mm	liguifan	OpenFOAM Running, Solving & CFD	5	June 3, 2014 03:53