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Old   January 13, 2009, 15:20
Default validating
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Hi I had an analyze on an airfoil. Because I wanted to valid my CFD I first analyzed a same airfoil witch I had its experimental results. I want to know that because the model witch I have its experimental results was smaller(1/4) of the main airfoil, how can I make a relationship between the meshes of the tow airfoil? For example the size of the mesh on the airfoil, its height and so on. thanks.
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Old   January 13, 2009, 20:59
Default fourth order convective scheme in stagggered grids
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Hi I'm a worker direct numerical simulation of turbulence in P.R.China. These days I read Morinishi's paper " Fully conservative higher order finite difference schemes for incompressible flow, J. Comput. Phys. 143 (1998)" and found the schemes proposed in his paper are very popular . I am interested in the fourth order accurate convective scheme in a staggered grid .However, I have some problem with equation 101 of Morinishi's paper. I try to derive the discrete formula of Eq.101 and write it in my code. Unfortunately, I found kinetic energy increase with time! I checked my code for several times and it works well when the convective term is discreted by second order schemes which is also proposed in Morinishi's paper. I think may be I have derive the Eq.101 into discrete form wrongly. So could any one please give me some advice on how to derive the discrete form of the convective term in a right way

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