Sensitivity Studies of Methods for Predicting Separation in Discrete Vortex Models
DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD
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The methods currently used for calculating the inception and location of separation in the discrete vortex model developed by Shoaff and Franks are described. Sensitivity studies of these methods were conducted to determine whether they cause the differences between experimental and numerical results seen during early flow development for the non-circular cylinders A and B. The method for calculation of the inception of separation was found to cause some differences in the data for both bodies. The remaining differences can be attributed to the inaccurate modeling of the generation of vorticity in the initial flow region. The method described for computing the location of separation on the upper protrusion of cylinder A was found to be adequate.
- Fluid Mechanics