Abstract

In calculating boundary layers, whether two-dimensional, axisymmetric, or fully three-dimensional, one begins with an assumed or measured pressure distribution on a body and solves sets of approximate equations, proceeding in a generally downstream direction until the boundary layer becomes so thick that the mathematical model is no longer valid and needs to be modified, or until flow separation occurs. This brief statement has already referred to five problems, the resolution of which seems to be much more difficult for the three-dimensional case, and especially for ship forms. These problems are the determination of the pressure distribution on the given body, the selection of the governing equations, a procedure for their solution, their modification when the boundary layer becomes thick, and the prediction of vortex generation and flow separation. .

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