# mesh for jets in tank, Gambit

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

 July 8, 2009, 11:25 mesh for jets in tank, Gambit #1 Member   anonym Join Date: Mar 2009 Posts: 65 Rep Power: 10 I would like to simulate jets at the wall of a big tank. Could you send me link or sth which can help me to create the desirable mesh in Gambit? I have never done this before, so I don't know how to create the mesh in this case technically... Please help me, it is quite urgent.

 July 9, 2009, 00:47 #2 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,232 Rep Power: 34 Prior to the mesh you need the geometry. So you have to modelise the fluid domain and then you can start with the mesh. In your case: create a brick, create a cylinder. Move the cylinder and place one extremity of it, to one extremity of the brick. Connect the brick's face with the cylinder's face (or split the brick's face with the cylinder's face). Your model is ready. Mesh the cylinder, mesh the brick. Apply the right BC. That's it. Of course, this is a trivial model and very simple geometry. __________________ In memory of my friend Hervé: CFD engineer & freerider

July 9, 2009, 04:23
#3
Member

anonym
Join Date: Mar 2009
Posts: 65
Rep Power: 10
Quote:
 Originally Posted by -mAx- Prior to the mesh you need the geometry. So you have to modelise the fluid domain and then you can start with the mesh. In your case: create a brick, create a cylinder. Move the cylinder and place one extremity of it, to one extremity of the brick. Connect the brick's face with the cylinder's face (or split the brick's face with the cylinder's face). Your model is ready. Mesh the cylinder, mesh the brick. Apply the right BC. That's it. Of course, this is a trivial model and very simple geometry.
I have done the geometry and I have tried to mesh it. The only problem, that since jets are much smaller than the tank volume, I cannot mesh it.I get always the same error message:"small gaps...."
Could you send me a file or link, how to create mesh in volumes, with different and well defined densities?!

 July 9, 2009, 05:06 #4 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,232 Rep Power: 34 If you followed my steps, you should have 2 separated volumes. So you can mesh the cylinder first. Mesh the top of the cylinder with the appropriate size. Then mesh the volume of cylinder, also with an appropriate size. Here your cylinder should be meshed. Then mesh the tank, but you will have problem a the mesh transition between cylinder / tank, because of the difference between mesh sizes. So you can apply an size function (option Meshed). Pick the top of the cylinder as (meshed) source (should also belong to the tank) and the tank volume as attached volume. Give appropriate growth rate and max size. And Mesh the tank. You can check Gambit tutorials __________________ In memory of my friend Hervé: CFD engineer & freerider

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Niklas Wikstrom (Wikstrom) OpenFOAM Running, Solving & CFD 122 June 15, 2014 06:20 lr103476 OpenFOAM Running, Solving & CFD 30 November 19, 2007 15:09 Joe CFX 2 March 26, 2007 18:10 Zhengcai Ye FLUENT 5 March 24, 2006 02:04 Kaushik Balakrishnan (Balakrishnan) OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ... 5 April 21, 2005 13:42

All times are GMT -4. The time now is 03:26.