CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Flow between 2 parallel flat plates

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

LinkBack Thread Tools Display Modes
Old   July 13, 2007, 11:17
Default Flow between 2 parallel flat plates
Posts: n/a
Is it possible that modelling water flow between 2 parallel smooth plates with a laminar solution produces a non-linear correlation between the discharge and the pressure gradient. The problem is that unexpectedly my parallel plates model cannot be described by the cubic law, as there are quite high non linear pressure losses. i tried to refine the mesh but the results don't change. Can anybody help me, thanks a lot.

  Reply With Quote

Old   July 14, 2007, 08:01
Default Re: Flow between 2 parallel flat plates
Posts: n/a
I think this could be helpful. I noticed that the longer the parallel plates the more the system approaches the cubic law. In fact, gradually increasing the length of my model from 32cm to 2m, gave a final linear relationship between the gradient and the discharge (with a very small error). Do you think this behaviour is caused by the presence of no flow boundaries on the upper lower and lateral surfaces? Thanks a lot
  Reply With Quote

Old   July 14, 2007, 09:59
Default Re: Flow between 2 parallel flat plates
Posts: n/a
Boundary layers need time/distance to develop unless set correctly at the inlet BC.
  Reply With Quote


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

Similar Threads
Thread Thread Starter Forum Replies Last Post
2d cfd parallel plates Animeile CFX 1 April 21, 2010 16:24
supersonic flow over flat plate varunjain89 Main CFD Forum 1 March 23, 2010 09:26
problems for the flow over flat wall iilw1314 Main CFD Forum 0 March 19, 2010 05:53
Flow over a flat plate & Flow over a cylinder cfdxue Main CFD Forum 0 November 27, 2007 00:26
Parallel plates pelli FLUENT 1 September 5, 2007 20:16

All times are GMT -4. The time now is 11:04.