CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

Rigid body motion + Boundary Layer

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 13, 2007, 15:19
Default Rigid body motion + Boundary Layer
  #1
Manoj Kumar
Guest
 
Posts: n/a
Hi everyone

I have a doubt trying out a simulation. This is regarding defining rigid body motion to a 2D block floating in a moving 2D tank. I am able to define motion to the block i.e. the boundary defining the block (or in other words, the 4 edges that makes the 2D block.).But I want the boundary layer mesh around the block to move along with the block when the grid changes during progress of the simulation. How do I incorporate this?

Thanks in advance.

Manoj

  Reply With Quote

Old   June 14, 2007, 03:10
Default Re: Rigid body motion + Boundary Layer
  #2
mAx
Guest
 
Posts: n/a
define your boundary layer as a fluid zone (in Gambit create a surface wich surrounds your wall, it will be your BL.Define this surface as internal BC), and then affect it the same rigid body motion hope it helps

  Reply With Quote

Old   June 14, 2007, 04:01
Default Re: Rigid body motion + Boundary Layer
  #3
Manoj Kumar
Guest
 
Posts: n/a
Thanks Max. let me try it out
  Reply With Quote

Old   June 19, 2007, 07:12
Default Re: Rigid body motion + Boundary Layer
  #4
Lecysyn
Guest
 
Posts: n/a
Sometimes, it does not work so easy. You can use Modify surface to create your BL frolm the mesh.
  Reply With Quote

Old   May 26, 2012, 10:34
Default Hi Friend
  #5
New Member
 
belgacem
Join Date: Jan 2012
Posts: 22
Rep Power: 14
belgacem is on a distinguished road
I’m using Ansys CFX V.13 and I need some head start.
I want to simulate wave generated by sliding mass (block). So, I’m supposed to simulate a wedge dropping the calm water surface. The 2-D transient simulation consisting of a wedge prism sliding down an inclined slope of 45°, with translation in the x and y-axis. In order to simulate the wedge falling, I used the Rigid Body Solver in Ansys CFX Pre 13. Noted that the Rigid body is defined as an Immersed Solid with two degree of freedom (x and y-axis). So, I give a density (or mass) to the block and I let it fall under gravity. I have specified a coordinate frame that has its origin at the center of mass of the physical Rigid Body. Another fixed coordinate frame was specified related to the water at rest.
First,
Please, I want to know how to make the block stop moving on the bottom where the potential energy was equal to zero? The velocity of the block was needed to describe the Kinematic of the landslide and it should equal zero in the bottom.
belgacem is offline   Reply With Quote

Reply

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
Domain Imbalance HMR CFX 5 October 10, 2016 05:57
Boundary condition for solid body motion in "still" air aamer Main CFD Forum 0 February 22, 2011 05:13
Dynamic Mesh : rigid body +deforming boundary amcfd FLUENT 1 September 4, 2007 07:01
New topic on same subject - Flow around race car Tudor Miron CFX 15 April 2, 2004 06:18
Please help with flow around car modelling! Tudor Miron CFX 17 March 19, 2004 19:23


All times are GMT -4. The time now is 22:36.