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

the Eulerian model and the lower volume fraction

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 27, 2005, 04:07
Default the Eulerian model and the lower volume fraction
  #1
hx li
Guest
 
Posts: n/a
Hello, I simulate the gas/solid flow in which the volume fraction of the solid phase in the inlet is 2.5e-06. The solid phase volume fraction in the vessel will reach up to 0.4. I select the Eulerain model and use the unsteady method to calculate the flow, but I find some problem in the simulation.

I find the trend of the volume fraction is different from the experiment. When several seconds having been calculated, the result show that in the places where the solid phase has not reached the volume fraction is about 3.5e-6-06, which is higher than the place the solid has reached. But when I increase the volume fraction in the inlet, the trend of the volume fraction distribution is right. I cannot find the reason for the phenomenon. Does the Eulerian model have lower limit to the volume fraction? Does the volume fraction of 2.5e-06 have exceeded the lower limit? Any advice is appreciated. Thanks in advance.

  Reply With Quote

Old   October 27, 2005, 06:05
Default Re: the Eulerian model and the lower volume fracti
  #2
Alec Eiffel
Guest
 
Posts: n/a
are you using the double precision solver?
  Reply With Quote

Old   October 27, 2005, 06:17
Default Re: the Eulerian model and the lower volume fracti
  #3
hx li
Guest
 
Posts: n/a
yes,i use the double precision solver.
  Reply With Quote

Reply

Thread Tools
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 On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 17:21.