CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Unsteady flow phase shift

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

LinkBack Thread Tools Display Modes
Old   October 31, 2008, 04:20
Default Unsteady flow phase shift
Posts: n/a
I am trying to solve a pulsatile flow problem with a familiar udf (sin wave velocity profile)using Fluent6.3. Boundary Conditions /Velocity Inlet: Udf with negative velocity so infact velocity outlet. /Pressure out: Patm/ time step: 0.0005 s/ Period: 0.5 s/ I am both using the pressure solver with 2nd order implicit unsteady formulation and NITA. I got a converged solution, with the same pressure drop curve as the experimental data but with some phase sfift.

I am taken pressure drop at three different places (y:at wall for all places x: 6.3m, 6.2275m, 6.3725m) and all is the same pressure curve there is no phase shift between them. However one period is completed 0.3m.

Any suggestions, to solve the problem

Thanks for now
  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
Canvas shift in Paraview achimfrahmmunterscom OpenFOAM Paraview & paraFoam 1 March 5, 2009 10:04
Mass Flow Phase Shift Ryan FLUENT 0 January 2, 2006 20:20
Unsteady Simulations of Phase Change Mike FLUENT 0 September 26, 2002 05:30
Two-phase unsteady-state model for reacting system Qibo Wan Main CFD Forum 0 April 30, 2002 06:03

All times are GMT -4. The time now is 02:10.