Atmospheric boundary layer modelling for boundary condition

fly829 · November 23, 2011, 02:22

Hi, everyone:

I'm modelling flow over complex terrain in ABL,
i have revised velocity profile and turbulent property , k, e, at inlet boundary,
and wall boundary condition applied roughness height and wall shear stress applied no-slip condition or constant shear stress,
outlet applied pressure outlet,
the solver i used is SIMPLE, and realizable k-e model, wall function applied standard wall function,
this is the problem i want to know, i check turbulence intensity near the wall, it present very higher value over 100%, it's very unreasonable.

Can anyone give some suggestions in ABL modelling? or i need to revised my boundary condition?

aerospaceman · January 26, 2012, 17:10

Hi there,

Is there any chance you could provide your UDF's (I'm assuming) for the inlet boundary conditions?

I'm new to UDFs so I could really use your examples.

Many thanks!

November 23, 2011, 02:22	Atmospheric boundary layer modelling for boundary condition	#1
fly829 New Member C.Y.HESIEH Join Date: Apr 2011 Posts: 3 Rep Power: 15	Hi, everyone: I'm modelling flow over complex terrain in ABL, i have revised velocity profile and turbulent property , k, e, at inlet boundary, and wall boundary condition applied roughness height and wall shear stress applied no-slip condition or constant shear stress, outlet applied pressure outlet, the solver i used is SIMPLE, and realizable k-e model, wall function applied standard wall function, this is the problem i want to know, i check turbulence intensity near the wall, it present very higher value over 100%, it's very unreasonable. Can anyone give some suggestions in ABL modelling? or i need to revised my boundary condition?

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January 26, 2012, 17:10		#2
aerospaceman Member Join Date: Nov 2009 Posts: 43 Rep Power: 16	Hi there, Is there any chance you could provide your UDF's (I'm assuming) for the inlet boundary conditions? I'm new to UDFs so I could really use your examples. Many thanks!