|July 7, 2011, 09:23||
Turbulent flow in smooth rectangular duct - Numerical vs. Literature correlations
Join Date: Mar 2011
Posts: 38Rep Power: 6
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,
|rectangular duct, turbulent flow, validation|
|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 02:00|
|Laminar flow or Turbulent flow||mech||FLUENT||0||January 27, 2007 19:51|
|laminar and turbulent flow in one simulation||msna||FLUENT||0||January 27, 2007 18:35|
|CFD of turbulent flows||raj calay||Main CFD Forum||23||April 23, 1999 05:03|