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

outflow bc-unrealistic pressure field (no backflow occours, incompressible fluid)

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 18, 2016, 21:40
Default outflow bc-unrealistic pressure field (no backflow occours, incompressible fluid)
  #1
New Member
 
Austin
Join Date: Mar 2016
Posts: 2
Rep Power: 0
FlowFlow is on a distinguished road
Hi fluent users,

i want to simulate the pressure loss of a structured channel. For this case i would consider some kind of Neumann-boundary condition at the outlet.

So i choosed in fluent following set-up:

velocity-inlet (pressure 400 000Pa, v=..., T=..., turbulence parameters...)
outflow-bc (flow rate weighting=1)

besides:
Incompressible fluid
No backflow at outlet-region


The pressure field in the domain is quite unreasonable, the static pressure on the outlet is about -124Pa, the total pressure about -55Pa!

(There are large vortices in the domain, but at the outlet the flow is fully developed.)

Whats wrong? i really would appreciate your suggestions!
FlowFlow is offline   Reply With Quote

Reply

Tags
neumann, outflow, outflow bc, pressure field, pressure loss


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
[Other] dynamicTopoFVMesh and pointDisplacement RandomUser OpenFOAM Meshing & Mesh Conversion 6 April 26, 2018 08:30
question regarding LES of pipe flow - pimpleFoam Dan1788 OpenFOAM Running, Solving & CFD 37 December 26, 2017 15:42
Water subcooled boiling Attesz CFX 7 January 5, 2013 04:32
What is the total energy for incompressible fluid? Harry Dong Main CFD Forum 12 February 4, 2006 01:55
Terrible Mistake In Fluid Dynamics History Abhi Main CFD Forum 12 July 8, 2002 10:11


All times are GMT -4. The time now is 21:46.