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Abstract

A method for evaluating dimple effects on a golf ball includes the steps of: setting up, in a computer, a geometric model representing a dimple that is a concave or convex region and a virtual airflow space which surrounds a periphery of the dimple model; generating a grid in the virtual airflow space and configuring the grid so as to be finer near the dimple model surface and coarser away from the surface; establishing a state where an air stream flows into the virtual airflow space; calculating the momentum thickness in a given plane passing through the dimple; and rating the dimple effects highly when the dimple model has a low momentum thickness. This method directly evaluates the shape of the dimples alone, and thus is simple and can shorten the evaluation time while ensuring good accuracy,

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