|
[Sponsors] |
HEM with Fluent: Use NIST Real Gas Model in 2-phase region |
![]() |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
![]() |
![]() |
#1 |
New Member
Join Date: Dec 2019
Posts: 19
Rep Power: 5 ![]() |
Hi everyone,
I am trying to model a two-phase flow with the Homogeneous Equilibrium Model (HEM), i.e. modeling the flow as 1-phase Problem and formulating an enthalpy-based Energy equation by the means of a UDS. Then, the Enthalpy and Pressure define the thermodynamic state of the fluid and I want to obtain all material properties (Density, cp, viscosity, etc.) from the NIST Real Gas Model. Unfortunately, Fluent Needs the fluid to remain either subcooled or superheated to use the NIST real gas model, and cannot perform calculations in the 2-phase Region. I read on the Ansys Student Forum, that some "expert commands" exist to override these Default Settings and use the NIST Real Gas Model in the 2-phase Region anyways. Does anyone know how to do this, exactly? I would really appreciate the help, as otherwise this would require writing a full UDRGM containing the same Information as the NIST RGM. Thanks in Advance! |
|
![]() |
![]() |
![]() |
![]() |
#2 |
New Member
管伟
Join Date: Apr 2019
Posts: 1
Rep Power: 0 ![]() |
Hello,
I am also trying to model a two-phase flow using a barotropic equation of state. Due to the temperature-independent properties, can i use the same properties (specific_heat, enthalpy and so on) according to UDRGM example in ANSYS help documentation? Therefore, I just change the material properties (density, speed of sound and viscosity). Is this right? Kind regards. |
|
![]() |
![]() |
![]() |
![]() |
#3 |
New Member
Karla Jacinto
Join Date: Oct 2020
Posts: 5
Rep Power: 4 ![]() |
Hi, did you solve this? I'm trying to do the same!
|
|
![]() |
![]() |
![]() |
Tags |
2-phase, hem, nist, udrgm, uds |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Real gas NIST model problem | jexposito | FLUENT | 18 | November 26, 2020 05:41 |
How to deactivate NIST real gas model | liying02 | FLUENT | 0 | October 16, 2019 05:37 |
Fluent Real Gas Model | Saha S | FLUENT | 5 | February 6, 2019 09:16 |
UDF velocity profile | willroca | Fluent UDF and Scheme Programming | 2 | January 10, 2016 03:13 |
[Gmsh] Import gmsh msh to Foam | adorean | OpenFOAM Meshing & Mesh Conversion | 24 | April 27, 2005 08:19 |