CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > CFX

Multiphase problem with convergence of evaporation

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

LinkBack Thread Tools Search this Thread Display Modes
Old   October 18, 2016, 11:44
Default Multiphase problem with convergence of evaporation
New Member
Michal Tomášek
Join Date: Sep 2015
Location: Czech republic
Posts: 5
Rep Power: 8
Mike_Tom is on a distinguished road
Hi everybody,
I am trying to simulate evaporating multiphase flow in diffuser of centrifugal compressor. There is water injection near the air inlet. The water particles are evaporated to water vapour in domain of diffuser.
I use Euler| Lagrange approach. The mixture is continuous fluid and is consisted from air ideal gas and H2O(water vapour). H2Ol (liquid) is set as particle transport fluid with diameter 4e-6 m and mass flow rate 8.6e-5 kg/s. The water is injected from Particle injection region.
I have a problem with convergence of energy imbalance and mass fraction imbalance. You can see on figure.
I use a tutorial file for set up the exercise (Spray dryer).
I defined a homogenous binary mixture with saturation properties (Antoine equation).
The turbulence is set as SST model.
I tried to fine a mesh, but it is without improvement.
I also assume that the number of water injection particle is big around 320 mil. particle with this diameter and mass flow rate.
Do you know where the problem should be?

I rather enclose CCL with my setting.
Attached Images
File Type: png imbalence.png (26.3 KB, 15 views)
File Type: png particle.png (82.4 KB, 15 views)
File Type: png vectors.png (182.4 KB, 17 views)
Mike_Tom is offline   Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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
Convergence Centurion2011 FLUENT 48 June 14, 2022 23:29
Convergence issue in natural convection problem chrisf90 FLUENT 5 March 5, 2016 08:30
[ICEM] issue occur after extrude 2D airfoil mesh and convergence problem in CFX shiyun ANSYS Meshing & Geometry 4 May 9, 2012 19:55
Force can not converge colopolo CFX 13 October 4, 2011 22:03
Need URGENT HELP for convergence problem of a turbine Pursuor CFX 5 October 3, 2011 17:44

All times are GMT -4. The time now is 00:57.