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

Cavitation and Compressible Liquid

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

Reply
 
LinkBack Thread Tools Display Modes
Old   January 5, 2007, 07:13
Default Cavitation and Compressible Liquid
  #1
JBS
Guest
 
Posts: n/a
I am trying to simulate a pressure pulse in an tube (L=250mm, D=2.5mm) filled with liquid. There is a dead end (wall) on one side of the tube, the other is an opening where a step function for Pressure is applied (100 to 75 bar). The Liquid is defined with pressure dependant density. Vapor is constant property gas. The Pressure is at least 2 orders of magnitude above the saturation pressure everywhere, so no cavitation is expected.

========================================

1st Simulation Single Phase with Liquid only

2nd Simulation: Mass transfer Off, both Fluids present

3rd Simulation Mass transfer On, (Cavitation Model)

========================================

Multiphase Options: Homogenious

Heat Transfer: Homogenious, Isothermal

Fluid Details: Continuous (both)

Interphase Transfer: None

========================================

All three Simulations give different Pressure Plots for the Dead End location. During the first time steps the max Vapor Volume Fraction rises from its Initial Value of 1e-15 (Solver Limit) to a Value of Order 1E-5 in the second and 5E-5 in the third simulation.

How to conserve the behaviour of the pure liquid as long as there is no cavitation without swiching from a single to a multiphase simulation ?

  Reply With Quote

Reply

Thread Tools
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cavitation model in compressible flows. jinwon park Main CFD Forum 1 May 11, 2015 07:24
Solver for two-phase (liquid-gas) flows + cavitation + gas demixing in pumps? petroo OpenFOAM 6 April 29, 2013 10:39
High speed water jet cavitation Richard CFX 0 November 18, 2008 11:07
Seeking help on modeling acoustic cavitation Jun Cai FLUENT 2 September 18, 2007 21:58
Compressibility In The Cavity Region In Cavitation Roozbeh FLUENT 2 July 12, 2003 02:02


All times are GMT -4. The time now is 15:08.