| 摘要 |
PROBLEM TO BE SOLVED: To perform revision and supplementation with a finite patch element to approximately fit an arbitrary boundary with high accuracy, in a voxel solution using a C<SB>1</SB>-continuous Helmholtz element. SOLUTION: A lattice is configured by a voxel using a threefold tertiary basis function. A vector field is Helmholtz-resolved to express it by a scalar potentialϕand a vector potentialΨ. A patch system comprising eight voxels is configured, the center of the patch system is superposed on a point of an actual boundary (an intersection point of an actual boundary face and a ridge of a basic element, one or more points on a mutually penetrating line of a surface of the basic element and the actual boundary face, or one or more points on the actual boundary face inside the basic element), and the revision and the supplementation is performed such that all first order differentiated values of a function of the point become zero. An energy outflow from a peripheral boundary of a voxel basis system is absent, and an high-order voxel element can be applied to an Euler type solution. COPYRIGHT: (C)2005,JPO&NCIPI
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