|
[Sponsors] |
August 27, 2019, 13:16 |
Ansys CFX condensing flows
|
#1 |
New Member
Mahesh Chamarti
Join Date: Feb 2017
Posts: 17
Rep Power: 9 |
I am trying to model a condensing flow in Ansys CFX for a Radial inflow turbine with inlet guide vane and impeller. The expansion causes a 15% by wt liquid at the outlet. Iam having convergence issues by modelling the gas as a fictitious ideal gas by specifying CP,viscosity, molecular weight, conductivity and ref pressure and temperature.
The gas parameters are as follows cpfld 11721.66 lbf*ft/slug*R cvfld 8914.53 lbf*ft/slug*R visc 2.735E-07 lbf*s/ft^2 conduct 5.355E-03 lbf/s*R tinlet 436.98 R pinlet 158414.40 psf pstatic 86027.01 psf mdot per vane 0.48317 slug/s Can someone suggest the best way to model this gas ? Thank you. Regards, Mahesh |
|
August 28, 2019, 03:20 |
|
#2 |
Senior Member
Gert-Jan
Join Date: Oct 2012
Location: Europe
Posts: 1,919
Rep Power: 28 |
Look for IAPWS or H2ORKvl materials
|
|
August 28, 2019, 11:54 |
|
#3 |
New Member
Mahesh Chamarti
Join Date: Feb 2017
Posts: 17
Rep Power: 9 |
Hi Gert-Jan,
Thank you for your reply. Can you be more specific? The gas contains methane 94% and 6% ethane by wt. Thank you. |
|
August 28, 2019, 12:22 |
|
#4 |
Senior Member
Gert-Jan
Join Date: Oct 2012
Location: Europe
Posts: 1,919
Rep Power: 28 |
Sorry. I was preoccupied and thought you were talking about Steam.
In your case.......... The Ethane and part of the methane condensates? You should look for: Materials -> Import Library Data -> import Wet Soave Relich Kwong Then select CH4vl and C2H6vl If you select these materials, you will model the gas and liquid as equilibrium. Then the interphase mass transfer is instantaneous. If you want to model non-equilibrium materials, you need to select the v and l materials separate and setup the mass transfer rates yourself, using Ranz Marshall or similar. Good luck. You might need this. |
|
Tags |
ansys, cfx, gas model |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Ansys SIG$ILL error | loth | ANSYS | 3 | December 24, 2015 06:31 |
Calculation of the Governing Equations | Mihail | CFX | 7 | September 7, 2014 07:27 |
Orthotropic Properties in ANSYS CFX 14.5 (XY, YZ, XZ) | lmark84l | CFX | 2 | August 6, 2014 12:34 |
ANSYS CFX Tutorial | Rashid | CFX | 25 | December 20, 2012 02:22 |
CFX bought by Ansys - good or bad?! | Pete | CFX | 38 | February 21, 2003 08:34 |