CFD Online Logo CFD Online URL
Home > Forums > General Forums > Main CFD Forum

Monitor of max velocity is const but keep on increasing in avg velocity.

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

LinkBack Thread Tools Search this Thread Display Modes
Old   May 17, 2023, 02:21
Default Monitor of 'max velocity' is const but keep on increasing in case of 'avg velocity'.
New Member
Join Date: Oct 2021
Posts: 3
Rep Power: 4
PratikJ is on a distinguished road
Hello all,
So my brief case set-up:
Steady-state, Multiphase (Air and liquid) (VOF model), Realizable k-e turbulence model.
Three monitors: Mass-flow rate at outlet, Avg velocity magnitude in liquid domain, Max velocity magnitude in liquid domain

So, before jumping into directly transient simulations I am running steady-state simulations first. After 9500 iterations, what I had observed is that monitor of max velocity magnitude is almost constant but profile of volume avg velocity is keep on increasing.
Interestingly enough, even residuals are now in order of 10^(-3).
What does this result signify?

From what I understand is that it is because turbulent eddies generated within domain as simulation progresses.

In such case, what would be the right time to stop steady-state simulation ? or should I revisit the case set-up and change the turbulence model.

Last edited by PratikJ; May 17, 2023 at 23:25.
PratikJ is offline   Reply With Quote

Old   May 17, 2023, 23:22
Post Adding plots for reference
New Member
Join Date: Oct 2021
Posts: 3
Rep Power: 4
PratikJ is on a distinguished road
Max velocity monitor plot :

Avg velocity monitor plot :
PratikJ is offline   Reply With Quote


monitoring solution, multiphase flow, realizable k-epsilon, steady state simulations, vof model

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
[mesh manipulation] refineMesh Error mohsen.boojari OpenFOAM Meshing & Mesh Conversion 3 March 1, 2018 22:07
[snappyHexMesh] Meshing a very thin meatus with SnappyHexMesh enginpower OpenFOAM Meshing & Mesh Conversion 29 September 9, 2017 03:46
cyclicAMI + simpleFoam crashes in parallel jmf OpenFOAM Running, Solving & CFD 6 June 28, 2017 15:30
Problem of simulating of small droplet with radius of 2mm liguifan OpenFOAM Running, Solving & CFD 5 June 3, 2014 02:53
LiftDrag coefficient in LES fabian_korn OpenFOAM Post-Processing 1 September 22, 2008 02:34

All times are GMT -4. The time now is 22:49.