CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

Calculation of Reynolds number

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

LinkBack Thread Tools Display Modes
Old   April 26, 2005, 08:43
Default Calculation of Reynolds number
Posts: n/a
Sponsored Links
Hi friends,

I am doing cfd simulation for two phase flow (water and air. Have anyone idea how to calculate reynolds number for such systme and define turbulence parameter for that?


  Reply With Quote
Sponsored Links

Old   April 29, 2005, 02:59
Default Re: Calculation of Reynolds number
Posts: n/a
I think there are many approaches to Re definition for two phase flows. Cavallini at al. introduce Re numbers separately for gas and liquid. For example,they define liquid ReL in channel as follows:

ReL = 4*G*(1-x)*delta/((1-epsilon)*MuL)


G - total mass velocity of liquid and gas [kg/(m^2 s)] x - gas quality [kg/kg] epsilon - void fraction of gas [ m^3/m^3 ] delta - liquid film thickness of annular ring, [m] MuL - liquid dynamic viscosity [N s/m^2]

Details see in J.R.Thome, J.El Hajal, A. Cavallini, Condensation in horizontal tubes, part 2: new heat transfer modeel based on flow regimes// Int. Journal of Heat and Mass Transfer, v. 46 (2003), pp. 3365-3387.

Best regards.

  Reply With Quote


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
Two way particle coupling in OF 2.0 and the particle reynolds number preichl OpenFOAM 7 February 9, 2012 16:38
Standard K-Epsilon TO Reynolds Stress calculation (for convergence) wjarrah Main CFD Forum 2 May 27, 2010 05:32
Low Reynolds Number k-epsilon formulation CFX 10.0 Chris CFX 4 December 8, 2009 00:51
Reynolds Number Matt CFX 0 February 25, 2009 06:40
High Reynolds Number Incompressible Flow Nick Lavery Main CFD Forum 3 February 19, 2002 16:47

Sponsored Links

All times are GMT -4. The time now is 03:12.