CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Dynamic Meshing of Simple 2D Geometry

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

LinkBack Thread Tools Search this Thread Display Modes
Old   August 1, 2014, 07:50
Default Dynamic Meshing of Simple 2D Geometry
New Member
Harry Mandilas
Join Date: Nov 2009
Posts: 16
Rep Power: 14
harman79 is on a distinguished road
Hi all,

I wanted to become familiar with dynamic meshing so I set up a basic 2D problem of an engine-like chamber geometry with a moving wall (i.e. piston). In fluent, I used the piston_full profile for the motion of the wall. After setting up all parameters according to the in_cylinder tutorial (describes cold flow in engine cylinder), I ended up with a pretty bad result..

I have attached pictures of my basic geometry initially and after meshing. What I get is basically long stripes for elements, starting from the datum position (i.e. TDC) and going all the way down to the end position (i.e. BDC). Its like the meshing "columns" are there but the "rows" are missing completely.. I tried various combinations for dynamic meshing methods (smoothing, layering, remeshing) but the result is always the same.

Any suggestions? In case anyone wants to have a look at my settings, I have attached my fluent case along with the tutorial (pdf) followed to set up the dynamic mesh.

Thanks a lot,
Attached Images
File Type: png Geom_All.png (7.7 KB, 36 views)
File Type: jpg Geom_Left_Bottom.jpg (25.5 KB, 28 views)
File Type: jpg Remeshed.jpg (55.4 KB, 29 views)
harman79 is offline   Reply With Quote

Old   August 7, 2014, 03:12
New Member
Join Date: Aug 2014
Posts: 9
Rep Power: 9
shayegan is on a distinguished road
i have been working on moving projectile i barrel. I need udf for dynamic mesh(Six degree of freedom solver). can anyone help me?
shayegan is offline   Reply With Quote

Old   January 17, 2018, 06:07
Default Any resolution?
New Member
Trev Smyth
Join Date: Jan 2018
Posts: 1
Rep Power: 0
tsmyth91 is on a distinguished road
Harman79, yours is an old post but how did you resolve your problem? I am having a similar problem with long stripes when the boundary moves in a 2D problem.
tsmyth91 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
Dynamic meshing 2D Manish Kumar Main CFD Forum 1 July 19, 2013 05:36
Dynamic meshing - UDF Jiang Fluent UDF and Scheme Programming 1 June 20, 2013 10:18
[Workbench] Meshing and export mesh from STL geometry alerfreire ANSYS Meshing & Geometry 0 March 26, 2013 09:25
Need help on meshing this simple geometry nha1g08 ANSYS Meshing & Geometry 3 March 9, 2011 02:13
[ICEM] Simple Geometry Poor Results tav98f ANSYS Meshing & Geometry 4 August 4, 2010 13:36

All times are GMT -4. The time now is 12:05.