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

phase distribution in a bio reactor

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

LinkBack Thread Tools Search this Thread Display Modes
Old   September 24, 2001, 10:02
Default phase distribution in a bio reactor
Stefan Leschka
Posts: n/a
Hi everybody, I have to write a c code for the phase distribution in a bio reactor. So far I have the Navier-Stokes for pressure and velocity field. But what can calculate my phase distribution? I would be delighted for any suggestions. Thanks in advance, Stefan
  Reply With Quote

Old   September 24, 2001, 10:22
Default Re: phase distribution in a bio reactor
Junseok Kim
Posts: n/a
Would you describe more detail about your phase distribution? My research area is multi-phase fluid flow, so I may have interest in your field.

What are governing equations for the phase distribution in a bio reactor?

Junseok Kim
  Reply With Quote

Old   September 24, 2001, 10:50
Default Re: phase distribution in a bio reactor
Stefan Leschka
Posts: n/a
Hello Mr. J. Kim,

thanks for your answer.

The bio reactor is filled with water. From holes the bottom come air bubbles and also some small solid particles with a diameter of some millimeters exist in the reactor. The reactor is a cylinder of 40cm in diameter and 5m in height. I transformed the Navier-Stokes equations to cylinder coordinates and redused it to a two dimensional form. I planned to let the continuity equation approximate a unit pressure field. This field I want to use in the momentum balance equations of each phase to calculate the velocities in an inner loop. Each equation needs a factor (between 0 and 1), which determines the volume fraction of the phase in the computational cell.

I guess, in my plan an outer loop is missing, which calculates these volume fractions and I have no idea of the equation, which can handle this problem.

Further I want to discretize the equations using finite volume differences, but I am still fighting with the integral law of Gauss to transform the volume integral into a surface intagral, because I never did a disretization in cylinder coordinates.

Thanks for thinking in my problem.


  Reply With Quote


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
alphaEqn.H in twoPhaseEulerFoam cheng1988sjtu OpenFOAM Bugs 15 May 1, 2016 16:12
VOF for single phase? vuccj7 FLUENT 0 April 20, 2011 19:59
two Phase column simulation chemeng OpenFOAM 3 August 18, 2010 12:53
Three phase simulation of airlift reactor Idtisak CFX 0 February 22, 2008 10:05
compressible two phase flow in CFX4.4 youngan CFX 0 July 1, 2003 23:32

All times are GMT -4. The time now is 23:06.