CFD Online Logo CFD Online URL
Home > Forums > ANSYS

Boundary conditions in ANSYS specific problem

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

LinkBack Thread Tools Display Modes
Old   July 26, 2012, 19:07
Question Boundary conditions in ANSYS specific problem
New Member
Join Date: Jun 2012
Posts: 12
Rep Power: 5
LukeFullard is on a distinguished road

I would like to simulate a tube (pipe) which is deformable. Initially the (viscoelastic) fluid inside the pipe will be stationary, no velocity or momentum. I want to then squeeze the tube so that fluid exits one or both ends of the pipe. What boundary conditions could I set in this case? Further, if i then release the tube I want to allow fluid to flow back into the tube (i.e. backflow)

I was thinking of setting inlet and outlet velocity to zero.

If I defined a stationary velocity profile at the inlet and outlets and then compressed my tube (i.e. generating fluid movement in the initially stationary fluid) does Polyflow force my boundaries to still be at the stationary velocity profile? How about Fluent?

I assume there is a way to update the velocity of the boundary based upon the fluid movement in the domain? i.e. if after a timestep some fluid exits the domain, that boundary condition there could be updated so that the velocity at the boundary has the velocity of the exiting fluid?

I thought pressure boundary conditions could be useful too (i.e. set atmospheric pressure at both ends) but I don't think Polyflow is capable of this, although I think Fluent is.

Help appreciated, I am new to CFD and viscoelastic flows.

Thanks all
LukeFullard is offline   Reply With Quote


boundary conditions, help for a newbie, polyflow

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
Putting Boundary Conditions in ANSYS CFX 12.1 palofpinaki CFX 7 January 5, 2015 06:51
Boundary conditions in Ansys workbench revanth ANSYS Meshing & Geometry 9 September 30, 2011 17:20
Simulation of a single bubble with a VOF-method Suzzn CFX 18 October 2, 2009 04:18
boundary conditions in Ansys CFX (heatsource) suitup CFX 4 June 29, 2009 10:10
Two-Phase Buoyant Flow Issue Miguel Baritto CFX 4 August 31, 2006 12:02

All times are GMT -4. The time now is 17:40.