Unformatted text preview: in the streamwise direction (in our case, the xdirection). The drag force can be determined by integrating the xcomponent of the pressure force around the cylinder: F D = 2πDL/360∫Pcosθdθ from 0 degrees to 180 degrees, where D and L are the diameter and length of the cylinder, respectively, and Pcosθ is the xcomponent of the pressure around the cylinder. The integration is from 0 to 180 degrees because the flow about the whole cylinder is assumed symmetric. The integral cannot just be solved as it is because every angle would have to be measured. Instead a trapezoidal approximation will have to be used to approximate the integral in increments of 10 degrees. Also the boundary layer will have to be extrapolated so that the calculations represent a uniform profile....
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 Spring '08
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 Force, Aerodynamics, Drag force

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