Adaptive grid division method and device for tubular object and storage medium

Abstract

The invention provides a tubular object grid adaptive division method. The method comprises the steps of obtaining a three-dimensional contour model of a target tubular object and a center line of each target lumen of the tubular object; extracting a plurality of target points from the center line, and determining the cross section of the target lumen of the tubular object corresponding to each target point; for each target point, determining an equivalent diameter of a tubular target lumen at the target point and a stenosis rate of the tubular target lumen at the target point; for each vertex on the three-dimensional contour model, determining a grid size parameter at the vertex based on the equivalent diameter and the stenosis rate of a tubular object target lumen at a target point closest to the vertex; and based on the determined grid size parameter at each vertex, performing grid adaptive division on the target lumen of the tubular object. In this way, the size parameters of the grids are adaptively set according to the equivalent diameter and the stenosis rate of the target lumen of the tubular object, and full-automatic grid adaptive division is achieved.

Description

technical field [0001] The present application relates to the technical field of tubular fluid fluid simulation, and in particular, to a method, device and storage medium for adaptive grid division of tubular objects. Background technique [0002] Mesh is the basis of finite element simulation. Meshing is to divide the surface 3D model into many small tetrahedral elements, which is equivalent to using tetrahedrons to fill the interior of the entire model, so that simulation calculations can be performed based on these small tetrahedral elements. . In the simulation process, the size of the mesh has an important influence on the simulation calculation. [0003] The mesh size setting is especially important for fluid simulation of tubular objects. Because the diameter and stenosis of the tube will change, the accuracy of the fluid simulation can only be improved by taking these changes into account and setting the mesh size adaptively. The following takes coronary blood flo...

AI Technical Summary

Problems solved by technology

But this type of method needs to determine the narrow segment, and manually add encryption balls in the narrow segment, and set the size of the encryption ball

Because of the introduction of manual intervention, this method will increase the steps of the grid and lengthen the time of the grid step, and it is impossible to make the grid into a fully automatic method.

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