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

question to the fluid mechanicans

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

Reply
 
LinkBack Thread Tools Display Modes
Old   July 29, 2013, 02:55
Default question to the fluid mechanicans
  #1
Member
 
Stephan Langenberg
Join Date: Sep 2011
Location: Germany
Posts: 73
Rep Power: 5
Jim87 is on a distinguished road
Hi,
I've problems with the model validation for my fluent simulation. I need an analytical equation for ime dependant pressure reduction...


- The simplified model:

At the beginning a compressible fluid (visco-elastic Polymer) is under high pressure und Temperature in a fixed geometry (think of a block)

Now one of the Faces is removed and the fluid is able to expand into the free room (space behind the removed face).

At the end of the free space is a pressure outlet, so that the material can reduce the pressure to standard atmosphere (1 atm)


My question is: How is the physical description of a time dependant pressure decrease for a fluid material that is compressible or better
(visco-elastic)

- In my opinion viscosity (a kind of inertia) have to influence the compression and decompression process. May I use a modified Bernoulli equation or a special differential equaution for the time dependant pressure drop?
Jim87 is offline   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


Similar Threads
Thread Thread Starter Forum Replies Last Post
[ICEM] Question about fluid domain dividing lnk ANSYS Meshing & Geometry 0 July 19, 2012 14:19
Question on PISO algorithm in computation fluid dynamics book by Chung Hooman Main CFD Forum 2 June 9, 2012 07:35
mass flow in is not equal to mass flow out saii CFX 2 September 18, 2009 08:07
Question on heat tranfer from an obstacle into fluid ekh95 FLOW-3D 0 June 3, 2009 18:09
Fluid flow in porous media question Orlando FLUENT 2 September 12, 2001 10:31


All times are GMT -4. The time now is 19:57.