Method, equipment and medium for dynamic matching of overlapping grid size based on cell cutting

A grid size and dynamic matching technology, applied in the field of computational fluid dynamics, can solve problems such as inefficient grid unit layout, difficulty in achieving size matching, and exceeding the limit of computing resources, so as to improve grid utilization efficiency and ensure interpolation accuracy , the effect of improving the efficiency of numerical simulation
CN114386344BActive Publication Date: 2022-06-07CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
Publication Date
2022-06-07

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Abstract

The invention discloses a method, device and medium for dynamic matching of overlapping grid sizes based on cell cutting, belonging to the field of computational fluid dynamics, comprising the step of: S1, judging the entry and exit of the overlapping area Ω in grid B according to the positional relationship of grid cells The grid unit sets IN and OUT of the grid unit, in which the grid unit intersecting the boundary of the overlapping area are also added to the set IN; S2, determine the cutting unit list P; S3, cut the grid unit; S4, restore the size of the grid unit; S5, carry out to the next moment t +1, repeat step S1 to step S4, complete t +1 for moment grid cell size matching. The invention improves grid utilization efficiency, realizes dynamic matching of overlapping grid sizes, not only ensures interpolation accuracy, but also controls the number of grid units to the greatest extent, and efficiently solves the problem of overlapping grid size matching.
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Description

technical field

[0001] The invention relates to the field of computational fluid dynamics, and more particularly, to a method for dynamic matching of overlapping grid sizes based on element cutting. Background technique

[0002] Fluid mechanics often needs to deal with the dynamic interaction of aerodynamics caused by the relative motion of multiple components, such as high-speed trains entering and exiting tunnels and aircraft launching missiles. In computational fluid dynamics, overlapping grid technology is often used to realize the real-time movement of computational grids following components, and the interaction between components is transmitted through the interpolation of the flow field between grids. In order to ensure the accuracy of flow field interpolation between grids as much as possible, the grid cells that overlap each other must be matched in size (close in size). The current commonly used method is to first estimate the motion trajectory, and then pre-refi...

Claims

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