CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Turbulent flow in smooth rectangular duct - Numerical vs. Literature correlations

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

LinkBack Thread Tools Search this Thread Display Modes
Old   July 7, 2011, 09:23
Default Turbulent flow in smooth rectangular duct - Numerical vs. Literature correlations
Join Date: Mar 2011
Location: Italy
Posts: 62
Rep Power: 14
marluc is on a distinguished road

I have done simulations of a turbulent air flow in a smooth rectangular duct. I compared my numerical results of pressure drop (friction factor) with literature correlations.

Here follows a brief summary of my simulation (because of symmetry I have only simulated one-fourth of the duct):

Fluid: air with costant properties
Turb model: k-w standard
y+: everywhere below 2.5 and above 0.8
Inlet B.C.: mass flow inlet
Outlet B.C.: outflow
Reynolds number: 7666

I compared my results for the pressure drop (or friction factor) with some literature correlations, e.g. f=(1.82*log_10 Re -1.64)^-2 and I have found a mean discrepancy of 12%.

I have also performed a sensitivity analysis on the grid but the results do not change.

Can anyone inform me if such a discrepancy is acceptable or if it is typically possible to obtain a better agreement between numerical simulations and literature correlations for the friction factor (or pressure drop)?

Thank you in advance,
marluc is offline   Reply With Quote


rectangular duct, turbulent flow, validation

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
flow over a cylinder urgent! kevin FLUENT 8 August 11, 2015 13:00
spectrum: LES of a turbulent channel flow finally goes to turbulent liu OpenFOAM Running, Solving & CFD 6 November 1, 2011 01:00
Laminar flow or Turbulent flow mech FLUENT 0 January 27, 2007 18:51
laminar and turbulent flow in one simulation msna FLUENT 0 January 27, 2007 17:35
CFD of turbulent flows raj calay Main CFD Forum 23 April 23, 1999 05:03

All times are GMT -4. The time now is 07:13.