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problems about simulating the flow over the 2d airfoil

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Old   April 9, 2013, 01:32
Default problems about simulating the flow over the 2d airfoil
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I am a new memeber here and have some problems about the Fluent.

velocity of freestream is 20m/s,incompress flow ,AOA is 5deg
question is:
1. I used the C topology grid around the airfoil. which boundary condition is better?the picture1 or the picutuer 2?

is there any other good choice?

2. I want calcuate the cl and cd of E387 under the Re =1e5 with the SST k-w and S-A turbulence model

y+=1 use boundary function
y+=1 don't use boundary functon
y+=30 use the boundary function
which one is better?

Need your help
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