CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT > Fluent UDF and Scheme Programming

UDF moving wall

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

Like Tree7Likes

LinkBack Thread Tools Search this Thread Display Modes
Old   October 13, 2016, 05:40
New Member
Join Date: Nov 2015
Posts: 5
Rep Power: 7
mhs is on a distinguished road
hi every body

I want to simulate a cylinder with axial moving in a pipe in constant velocity in 3D. one face of cylinder has the velocity inlet b.c and a non - newtonian fluid exit from there into the pipe with constant velocity, while the cylinder moves axial in pipe. my question is that how should I define axial moving for the cylinder and for a face with velocity inlet b.c?

best regards
mhs is offline   Reply With Quote

Old   October 16, 2016, 14:18
New Member
pankaj yadav
Join Date: Sep 2015
Posts: 1
Rep Power: 0
pky3038 is on a distinguished road
for header file go to Ansys install directory >v150>fluent>fluent15.07(this differs according to installed version )>src > header files
pky3038 is offline   Reply With Quote

Old   September 29, 2020, 01:09
New Member
Join Date: Sep 2020
Posts: 1
Rep Power: 0 is on a distinguished road
Originally Posted by Komon View Post
i suppose then the boundary you are trying to move is a wall (bottom of the cilinder). I used the given udf for a similar purpose, for moving a whole cilinder in a pool of liquid/another cilinder. the only problem I faced was the deformation of the interior mesh cells, which I could not get to split/grow together. however, the difference I see in your attempt is that the wall, which you are trying to move, is ''blocked'' by the wall, which resembles cilinder side surface. I didn't have that in my case.
I think you should also include this side wall and interior zone in the dynamic mesh and use ''deforming'' as a type. and then work around conditions you have available (remeshing and so on), which define when your cells grow together or separate.
Hi Komon, I am trying to simulate a similar 2D case in which a rectangular channel moves past different ports/geometric boundary conditions. I want to set the motion such that after crossing the entire geometry, the channel should come back at the original position and the cycle should start again. Basically I want to know how I can implement repeating/cyclic boundary conditions for the motion of channel. Any insights and comments will be appreciated.
Thank you,
Pawan is offline   Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
[Commercial meshers] Fluent3DMeshToFoam simvun OpenFOAM Meshing & Mesh Conversion 50 January 19, 2020 15:33
How to use UDF to define a moving wall lingo FLUENT 9 August 19, 2014 09:14
stationary wall vs. moving wall user0314 FLUENT 0 August 26, 2011 09:42
udf variable for wall temperature Kiran FLUENT 0 July 31, 2008 08:31
Multicomponent fluid Andrea CFX 2 October 11, 2004 05:12

All times are GMT -4. The time now is 21:16.