CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

NIST model in Ansys-Fluent

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 14, 2013, 05:52
Unhappy NIST model in Ansys-Fluent
  #1
Member
 
Shuvayan Brahmachary
Join Date: Oct 2012
Posts: 36
Rep Power: 14
b.shuvayan is on a distinguished road
Hi all,
I wanted to simulate R134a in Ansys Fluent in its super critical phase and hence enabled NIST real gas model for the same.

An annular pipe is made and meshed in workbench where inner wall is heated and outer wall is made adiabatic and the flow is made upward in the annular pipe with boundary conditions as follows:-
inlet mass flow rate:- 0.16Kg/m2s
inlet temperature :-423K
Pressure outlet :- 5Mpa
and inlet pressure :- 5Mpa
heat flux :- 25kW/m2
The temperature and pressure are above the critical point.But the error which I am getting is :-

REFPROP_error(202) from function:tprho (density)
liquid iteration has not converged for T= Nan K,P= 5.0000Mpa,rho?(last guess)=Nan mol/L,compositions =1.0000

Kindly help me....
Thanking you.
b.shuvayan is offline   Reply With Quote

Old   April 3, 2013, 12:02
Default
  #2
New Member
 
Johnson
Join Date: Apr 2013
Location: Lausanne
Posts: 1
Rep Power: 0
microwinner is on a distinguished road
Send a message via MSN to microwinner
Hi, is your problem solved? Recently, I met this problem? But I avoided it by changing the boundary condition. However, in this case, it not my original situation. I am very interested in your results. Thanks


Quote:
Originally Posted by b.shuvayan View Post
Hi all,
I wanted to simulate R134a in Ansys Fluent in its super critical phase and hence enabled NIST real gas model for the same.

An annular pipe is made and meshed in workbench where inner wall is heated and outer wall is made adiabatic and the flow is made upward in the annular pipe with boundary conditions as follows:-
inlet mass flow rate:- 0.16Kg/m2s
inlet temperature :-423K
Pressure outlet :- 5Mpa
and inlet pressure :- 5Mpa
heat flux :- 25kW/m2
The temperature and pressure are above the critical point.But the error which I am getting is :-

REFPROP_error(202) from function:tprho (density)
liquid iteration has not converged for T= Nan K,P= 5.0000Mpa,rho?(last guess)=Nan mol/L,compositions =1.0000

Kindly help me....
Thanking you.
microwinner is offline   Reply With Quote

Reply

Tags
nist


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Seeking Macroscopic Particle Model in Fluent bzhang7 FLUENT 3 June 25, 2022 18:54
How to open Icem mesh in Ansys Fluent? emmkell FLUENT 27 February 6, 2018 04:34
gambit in Ansys FLuent 13 saharesobh FLUENT 0 August 1, 2012 16:30
how can export model from fluent to ansys abcd19 ANSYS 0 June 18, 2011 16:15
ansys fluent les model bene Main CFD Forum 0 June 7, 2011 11:45


All times are GMT -4. The time now is 07:20.