# NIST model in Ansys-Fluent

 Register Blogs Members List Search Today's Posts Mark Forums Read

 February 14, 2013, 05:52 NIST model in Ansys-Fluent #1 Member   Shuvayan Brahmachary Join Date: Oct 2012 Posts: 34 Rep Power: 6 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.

April 3, 2013, 11:02
#2
New Member

Johnson
Join Date: Apr 2013
Location: Lausanne
Posts: 1
Rep Power: 0
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 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.

 Tags nist

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post emmkell FLUENT 26 June 9, 2015 15:38 saharesobh FLUENT 0 August 1, 2012 15:30 abcd19 ANSYS 0 June 18, 2011 15:15 bene Main CFD Forum 0 June 7, 2011 10:45 bzhang7 FLUENT 0 May 27, 2009 13:36

All times are GMT -4. The time now is 06:14.