CFD Online Logo CFD Online URL
Home > Forums > FLUENT

how to draw the path line in 3D?

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

LinkBack Thread Tools Display Modes
Old   February 24, 2001, 02:25
Default how to draw the path line in 3D?
qing hao
Posts: n/a
hi, everybody,

In a 3D project, I want to show the sheath flow and sample flow by plotting their path lines. The flow is single phase but with different entrance velocities, the sheath flow is treated with constant velocity in the inlet_1 while the sample flow is treated with parabolic velocity profile in the inlet_2. After mixing, the two flows will pass through a cone part(seems like a nozzle, and the flow is laminar, Re number is about 100), and then a square part, whose end is termed as the outlet.

I can finish the computing in FIDAP and the velocity distribution in any crossing plane seems good, But here is the problem: since I use the brick mesh, so FIDAP should be able to handle the path lines, and the support engineer said yes too. But according to his statement and script file, the path lines will be outside of the geometry, which is definitely wrong; and once I give the DT value very small, the path lines in at the entrance will wave, which is not true either.

So I have to turn here to ask some experienced and knowledgabl people to help me. I can email the files to you. (I hope I can attach my files here.)

Thanks a lot.

qing hao
  Reply With Quote

Old   October 8, 2010, 16:01
Default Cytometer flow
New Member
Join Date: Feb 2010
Location: OKlahoma
Posts: 13
Rep Power: 7
sammyraj is on a distinguished road
Hi qing ,

I am facing same problem as yours, I have to introduce two fluids( liquids) at two inlets and the geometry consists of two annular pipes in which inside pipes ends at the middle and fluid coming from it joins with the fluid coming from outside pipe and both go through a single outlet. Hope I made it clear.

Please suggest me a method to use and how to introduce two inlets especially and I have been trying to use VOF method but I am not sure I am in a correct way. and also my fluids does not mix.

..I am trying simulate a flow in cytometer and my objective is to measure the focusing width of the sample flow. I am using Ansys FLUENT as post processor.

Thank you.

sammyraj is offline   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
Problem with Gmsh nishant_hull Open Source Meshers: Gmsh, Netgen, CGNS, ... 23 August 5, 2015 02:09
OpenFOAM 1.7.1 installation problem on OpenSUSE 11.3 flakid OpenFOAM Installation 16 December 28, 2010 09:48
Regarding FoamX running Kindly help out hariya03 OpenFOAM Pre-Processing 0 April 18, 2008 04:26
Axisymmetrical mesh Rasmus Gjesing (Gjesing) OpenFOAM Native Meshers: blockMesh 10 April 2, 2007 14:00
error while compiling the USER Sub routine CFD user CFX 3 November 25, 2002 16:16

All times are GMT -4. The time now is 07:31.