CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > General Forums > Main CFD Forum

Cavity flow

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 6, 2001, 07:58
Default Cavity flow
  #1
Shannag
Guest
 
Posts: n/a
Hi, I would like to investigate the flow behaviour within a cavity filled with water. The water inside the cavity is driven by wall jet of air. The characteristic velocity defined Re of the driven cavity is the velocity at the air-water interface. You know that at the interface, Shear stress_air side = Shear stress_water side. Neglecting the surface tension and the motion of the interface, Could you please tell me how can I decide approximately the volumetric flow rate of air stream.
  Reply With Quote

Old   September 6, 2001, 17:29
Default Re: Cavity flow
  #2
John C. Chien
Guest
 
Posts: n/a
(1). Please describe you boundary conditions and geometry first, before I can answer your question.
  Reply With Quote

Old   September 7, 2001, 06:50
Default Re: Cavity flow
  #3
Shannag
Guest
 
Posts: n/a
Well, it is a rectangular cavity. The no slip boundary condition is applied to all solid faces of the cavity except to the upper air-water interface. The air flows in the chanel is bounded by the lid, where the no slip BC is applied, and the air-water interface. Many thanks,
  Reply With Quote

Old   September 7, 2001, 14:40
Default Re: Cavity flow
  #4
John C. Chien
Guest
 
Posts: n/a
(1). The air flow rate is related to the velocity profile, which can be used as the inlet boundary condition. You can specify the inlet boundary condition. (uniform or parabolic, or something else)
  Reply With Quote

Old   September 7, 2001, 14:57
Default Re: Cavity flow
  #5
Shannag
Guest
 
Posts: n/a
Dear Chien, I am doing exactely what you said.But how can I know that air flow rate is corresponding the required Re of the cavity which is based on the velocity at the air-water interface before measuring it experimentaly? Thanks.
  Reply With Quote

Old   September 7, 2001, 15:03
Default Re: Cavity flow
  #6
John C. Chien
Guest
 
Posts: n/a
(1). You don't. (2). Run a few cases, and you can zoom in by interpolation. you can program the logic and let the program do it for you, or you can do it by hand.
  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
2D Lid Driven Cavity Flow simulation using MATLAB josephlm Main CFD Forum 4 August 17, 2023 21:36
Reynolds Number matching in Cavity flow Endee Main CFD Forum 6 April 20, 2010 05:47
[blockMesh] basic blockMesh : manipulate the lid-driven cavity flow tutorials Lexa OpenFOAM Meshing & Mesh Conversion 2 November 12, 2009 22:15
Supersonic Flow over a Cavity (coodles): Maximum Iterations Exceeded sushant OpenFOAM Running, Solving & CFD 0 April 9, 2009 03:52
Inviscid Drag at subsonic, subcritical Mach # Axel Rohde Main CFD Forum 1 November 19, 2001 13:19


All times are GMT -4. The time now is 03:20.