Method of predicting a physical quantity of a fluid or a magneto

Details Method of predicting a physical quantity of a fluid or a magneto Method of predicting a physical quantity of a fluid or a magneto

1991-03-25

1993-10-19

Teska, Kevin J.

Boots, shoes, and leggings

364510, 364556, G06F 1520, G06G 748

Patent

active

052552128

ABSTRACT:
A method for calculating a physical flow quantity of a fluid or magnetofluid propagating over a surface such as in a wind tunnel. The method includes the steps of setting a main mesh having predetermined mesh spacing relative to space and time. The method sets a sub-mesh having a mesh spacing smaller than that of the main mesh in space regions between points in the main mesh, in which the magnitude of inclination of the physical quantity is above a first preset level. Next, the method sets mesh points, at which the magnitude of inclination of the physical quantity is greater than a second level that is greater than the first level, as singular points. Thereafter, the method calculates, via a CIP method, the values at the mesh points of the main mesh after an increment of time (a mesh spacing of the main mesh over the time variable). The values at the mesh points of the sub-mesh after the increment of time are also calculated via the CIP method. The variations of the physical quantity around the singular points are calculated, via approximate analytic function or delta function approximation. Next, the values at the main mesh points are corrected in view of the data obtained in the CIP and delta function approximation steps.

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Journal of the Physical Society of Japan, vol. 57, No. 8, Aug. 1988, pp. 2598-2601, A New Higher-Order Godunov Method for General Hyperbolic Equations, Takashi Yabe et al.

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