CFD over rectangular wing with multi winglets

geeteshwaghela1234 · April 17, 2014, 15:17

hey, i am simulating flow over a rectangular wing of semi span 300mm and chord of 75mm at the root with taper ratio as 1.
i want to validate with the wind tunnel results.
i have used naca 0015 airfoil.
i have used spalart-allamaras turbulence model and inlet velocity as 20m/s, outlet gauge pressure as 0.
rest everything is set as wall.
i am getting floating point error mostly and when i reduced reference values by half, my continuity equation is diverging in range on 1e+05.
what can i do now to converge the solution??
i would like to proceed for multi winglets after i get this right.

venkateshaero · April 23, 2014, 05:49

wch solver your using ?

geeteshwaghela1234 · April 23, 2014, 14:34

i am using ansys fluent 14.5
i tried using k omega sst model also for solving but the results i am getting are varying from experimental data.
since the domain is restricted to a particular size, will it be accurate to use spalart allamaras model?

April 17, 2014, 15:17	CFD over rectangular wing with multi winglets	#1
geeteshwaghela1234 New Member Geetesh Waghela Join Date: Apr 2014 Posts: 6 Rep Power: 12	hey, i am simulating flow over a rectangular wing of semi span 300mm and chord of 75mm at the root with taper ratio as 1. i want to validate with the wind tunnel results. i have used naca 0015 airfoil. i have used spalart-allamaras turbulence model and inlet velocity as 20m/s, outlet gauge pressure as 0. rest everything is set as wall. i am getting floating point error mostly and when i reduced reference values by half, my continuity equation is diverging in range on 1e+05. what can i do now to converge the solution?? i would like to proceed for multi winglets after i get this right.

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April 23, 2014, 05:49		#2
venkateshaero Member venki Join Date: May 2011 Posts: 84 Rep Power: 14	wch solver your using ?

April 23, 2014, 14:34		#3
geeteshwaghela1234 New Member Geetesh Waghela Join Date: Apr 2014 Posts: 6 Rep Power: 12	i am using ansys fluent 14.5 i tried using k omega sst model also for solving but the results i am getting are varying from experimental data. since the domain is restricted to a particular size, will it be accurate to use spalart allamaras model?