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

Axisymmetric Vof

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 20, 2002, 02:34
Default Axisymmetric Vof
  #1
Turbina
Guest
 
Posts: n/a
In 2dd problem Axisymmetric Vof In

- Multhiphase Model 2 components - visosus model k-epsilon 2 eqn standard - standard wall functions

the solver that it doesn't converge the iter continuity

- me from the following mistake:

Error: Internal error at line 743 in file 'amgif.c'. divergence detected in AMG solver Error Object: ()

turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 132 cells.

Thanks for your attention. Bey well,

  Reply With Quote

Old   August 20, 2002, 08:01
Default Re: Axisymmetric Vof
  #2
CFD MAN
Guest
 
Posts: n/a
Hallo What VOF scheme did you use? It should not have any problem to get converged solution. Start with a smaller time step if you do time dependent simulations.

CFD MAN
  Reply With Quote

Old   August 21, 2002, 02:34
Default Re: Axisymmetric Vof
  #3
Turbina
Guest
 
Posts: n/a
Multiphase Model

Geo reconstruct,

Courrant Number 0.25

Thank You
  Reply With Quote

Old   August 21, 2002, 03:57
Default Re: Axisymmetric Vof
  #4
CFD MAN
Guest
 
Posts: n/a
I don't see any reason why it doesn't work.
  Reply With Quote

Old   August 21, 2002, 08:33
Default Re: Axisymmetric Vof
  #5
Turbina
Guest
 
Posts: n/a
Also System 3DD

Real Cilinder Heght 0.2 m Radius 1.45 m

Boudary Condition Wall Face External Cilinder.

GAS Density 1.225 kg/m^3 Voscosity 1.7894e-04 Poise

Melt Density 1187 kg/m^3 Voscosity 2169 Pois

Multiphase Model VOF Geo Costructor Primary Phase GAS Secondary Phase Melt Currant Number 0.25

Viscosus Model K-Epsilon 2 eqn –Standard – Standard Wall Function

Solution Controls - Force Body Weigted – PISO –First Order Upwind

Operation Condition Gravity Y = - 9.81 m/sec^2 Specificed Operatin Density

Boudary Condition Wall Diam = 2.9 m - Rotazional Speed 0.816 Rad / sec Relatyve to Adjacent Cell Zone.

Region Adaption X MIN = -1.45 m X MAX = 1.45

Y MAX = -1.2 YMAX =-1.45

Z MAX = 0 ZMIN = 0.2

Iterate Time Step Size 0.002 – Number of Step 5 – Max Iteration = 10

Continuity no converge
  Reply With Quote

Old   August 21, 2002, 19:38
Default Re: Axisymmetric Vof
  #6
CFD MAN
Guest
 
Posts: n/a
Does it converge in 10 iterations? Whats the convergent criteria?

CFD MAN
  Reply With Quote

Old   August 22, 2002, 16:16
Default Re: Axisymmetric Vof
  #7
Turbina
Guest
 
Posts: n/a
They are the Iteration max for step, but doesn't converge also with Max Iter = 50.

Could question but perhaps depend to type of mesh ?

Thank you
  Reply With Quote

Old   August 22, 2002, 20:12
Default Re: Axisymmetric Vof
  #8
CFD MAN
Guest
 
Posts: n/a
I am pretty sure that its the mesh quality. I have been using VOF with geo for more than 2 years now, I didn't have any major difficulties.

CFD MAN
  Reply With Quote

Old   August 23, 2002, 15:44
Default Re: Axisymmetric Vof
  #9
Turbina
Guest
 
Posts: n/a
Does it know pointing to me a few books that treat any problem of Mesh in turbulent regime? Thank you.
  Reply With Quote

Reply

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
vof + hydrostatic pressure ariorus FLUENT 0 August 7, 2009 11:57
plz rply urgent regrding vof model for my system garima chaudhary FLUENT 1 July 20, 2007 09:37
urgent query regarding vof model plz rply Garima Chaudhary FLUENT 0 July 13, 2007 03:20
axisymmetric in vof moona FLUENT 1 January 25, 2007 09:49
Difficult BCs about Freesurface Simulation by VOF Yongguang Cheng FLUENT 0 September 19, 2003 08:39


All times are GMT -4. The time now is 07:09.