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

Continuity equation not converging in 2 phase VOF model.

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 9, 2021, 07:18
Post Continuity equation not converging in 2 phase VOF model.
  #1
Member
 
Join Date: Jul 2020
Location: India
Posts: 64
Rep Power: 5
Cooper24 is on a distinguished road
I am modelling melting and solidification of solid surrounded by an inert gas. I am using VOF with CSF. It is a 2 phase flow. I am using Explicit VOF with a Courant Number limit of 0.5 for VOF and Global Courant Number as 0.99.
The solution starts good. It converges within few iterations for the first few time-steps. But I see that many a times the Global Courant no. and Explicit VOF Courant No. reach as high as 6 and 1 respectively. Should they not be within the limits given? Also, after few time steps the continuity equation does not show convergence but the velocity and energy equations converge. I have set a limit of 100 iterations/time-step and continuity equation is only creating problem.
Any help is much appreciated on how to solve the issue with continuity equation convergence and why the courant numbers are showing the above said behavior.
Thanks in advance.
Cooper24 is offline   Reply With Quote

Reply

Tags
continuity convergence, courant number increasing, explicit vof, vof multiphase

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
number of equations/variables in VOF model Ema40 Fluent Multiphase 5 January 14, 2020 20:48
Volume fraction of dispersed phase to determine DPM, VOF, Mixture model Mohsin FLUENT 5 March 5, 2018 07:47
pimpleDyMFoam computation randomly stops babapeti OpenFOAM Running, Solving & CFD 5 January 24, 2018 05:28
VOF with Species Transport results in continuity equation blowing up pramodnarayan Fluent Multiphase 1 October 14, 2015 17:04
Superlinear speedup in OpenFOAM 13 msrinath80 OpenFOAM Running, Solving & CFD 18 March 3, 2015 05:36


All times are GMT -4. The time now is 18:29.