|
[Sponsors] |
May 24, 2007, 03:11 |
steady state, laminar vof_model
|
#1 |
Guest
Posts: n/a
|
Dear Sir/Madam,
I had a query regarding staedy state solution of the vof_model given as 16 th example in tutorial guide of fluent. I tried it with a different geometry i.e. of a cylinder of radius 2 cm and height 8 cm. I filled it with water till a height of .03 m. I wanted a steady state solution of the problem instead of the unsteady state solution. But the problem what I am facing is that the solution doesnt converges at all even though I reduced the under relaxation parameters to 1/100 th of the initial values given by default.Still it will not converge after some time and there occurs a sharp rise i.e. vertical rise in the residual values and finally it shows an error.THe changes what I made from tutorial problem setting of vof_model of unsteady state to steady state are as follows: 1. unsteady state to steady state under solver 2. k-e model to laminar model under viscous as I want to work first with the low rpm/sec i.e. till 2 rad/sec which gives a reynolds no in laminar region for this geometry of mine 3. Under solution controls I took the scheme SIMPLE under pressure-velocity coupling and under Discretization I took the scheme STANDARD 4.Under surface monitors I took Iteration for define instead of flow time Rest everything I kept same But I also tried with the presto scheme only instead of standard , though it gives convergence but it doesnt give any change in the profile of liquid in cylinder after iteration is over its still .03 m filled horizontal line no parabolic shape. Plz guide me I m not able to interpret whats the issue. Regards Garima |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
mass flow in is not equal to mass flow out | saii | CFX | 12 | March 19, 2018 05:21 |
Solver for transonic flow? | Martin Hegedus | OpenFOAM Running, Solving & CFD | 22 | December 16, 2015 04:59 |
???????simulate heat distribution in an incompressibe laminar steady state flow?????? | anijdon | OpenFOAM | 1 | November 27, 2010 14:37 |
Constant velocity of the material | Sas | CFX | 15 | July 13, 2010 08:56 |
convergence problem in 3D steady state, laminar flow in a bath | vajiheh | FLUENT | 0 | July 10, 2009 12:18 |