# Urgent-CFD of Shock Absorber

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

 July 2, 2004, 05:13 Urgent-CFD of Shock Absorber #1 Shaji Guest   Posts: n/a We are doing CFD Analysis of a double cylinder Shock Absorber using Fluent. The fluid property and piston speed are known.Is the pressure build inside the cylinder required as inputs? Can anyone tell what should be the Boundary conditions and Is dynamic meshing required or Sliding mesh will do. HAs anyone done a similar problem. Thanks in Advance Shaji Abraham

 July 3, 2004, 15:02 Re: Urgent-CFD of Shock Absorber #2 Jim_Park Guest   Posts: n/a Is this a gas-filled shock or gas over liquid?

 July 5, 2004, 00:51 Re: Urgent-CFD of Shock Absorber #3 Shaji Guest   Posts: n/a Its gas over oil type shock absorber.the shock absorber is a double barrel type where the inner tube is fully filled with oil and outer has got oil and air. Is dynamic meshing required for this type of simultion as the piston is moving?

 July 22, 2004, 15:41 Re: Urgent-CFD of Shock Absorber #4 Rafael Luis Teixeira Guest   Posts: n/a My doctorate is the development of a new active damper with variable orifices. The numerical model are formed by two piston interconnected by valve that simulate the variable orifice. I use ANSYS 8.0 to simulate. I use these conditions: Initial pressure inside the system; Displacement and velocity are zero in the walls. On the first piston I impose the structural displacement and on the second piston I put one spring. I use dynamic mesh. I have some problems with the Bulk Modulus of Oil. If someone work with ANSYS/ FSI with oil could help me. I use FLDATA16,BULK,BETA,1,16e7. I obtain this value by the division of oil Bulk by oil density = 9,58e9 / 822. But with large Bulk the convergence is not obtained. Then I simulate with FLDATA16,BULK,BETA,1e5. How I can resolve this problem ? Thanks.

 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 Jas Main CFD Forum 10 March 30, 2013 13:26 Patrick Dale FLUENT 0 February 7, 2008 05:52 Shaji FLUENT 0 July 1, 2004 05:37 Tareq Al-shaalan Main CFD Forum 10 June 12, 1999 23:27 Heinz Wilkening Main CFD Forum 38 March 5, 1999 12:44

All times are GMT -4. The time now is 23:46.