|February 17, 2013, 09:07||
Tips for air entrainment/bubbles? + steady state multiphase models
Join Date: Dec 2011
Posts: 13Rep Power: 5
Can anyone give me some tips on simulating bubbles in a model? Specifically the bubbles are generated by air entrainment.
The model I am looking at is a spillway where the water flow should generate bubbles at the bottom of the tunnel.
I was previously using a VOF model with two Eulerian phases, H20 and Air and in 2D simulations I have a mesh of around 1mm and a timestep of 0.1ms. However the result seems a little off when looking at the volume fraction scalar results.
Also, is it possible to run a VOF model in steady state? I attempted to do this, but the results were extremely erratic. Are there any ways to get an accurate multiphase model using a steady state? There is no temperature change in my model if that helps.
A picture of my model (running at the moment) has been attached to show the sort of simulation I am looking at:
I am relatively new to multiphase models, all my knowledge of which has been self taught, so any advice would be appreciated on the finer options of the models.
|air entrainment, bubble, multiphase, vof|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Constant velocity of the material||Sas||CFX||15||July 13, 2010 08:56|
|mass flow in is not equal to mass flow out||saii||CFX||2||September 18, 2009 08:07|
|regarding steady state discrete phase calculations||hajszan_gyula||FLUENT||1||February 28, 2006 02:32|
|About the difference between steady and unsteady problems||Lisa||Main CFD Forum||11||July 5, 2000 14:37|
|Steady state formulation of turbulence ??||Jitendra||Main CFD Forum||1||June 27, 2000 18:49|