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How to obtain correct viscous pressure drag using CFX?

April 26, 2017bbs CFD cfx drag forum obtain pressure viscous

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How to obtain correct viscous pressure drag using CFX?

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Dear All, I am investigating ship viscous resistance using a CFD code (CFX) and so far, I use ellipsoids body of revolution. In the absence of wave resistance, the total resistance consists of frictional resistance and viscous pressure resistance. The grid is created using CFX-MESHBUILD, a structured grid generator, and the flow solver is CFX 4.2. Further, the grid quality and density seem to be OK. As far as ITTC correlation line is concerned, frictional resistance seems to be correct. However, viscous pressure resistance looks to be overestimated. Does anyone have the explanations for this?