Multi-block structured grid data compression storage method, decompression method and device

Abstract

The invention discloses a multi-block structured grid data compression storage method, comprising: extracting block information and grid geometric data of a multi-block structured grid; num Output to a file; extract the logical surface information and logical surface geometric data of the 6 logical surfaces of a single grid block; output the logical surface information and logical surface geometric data of the 6 logical surfaces of a single grid block to a compressed file in sequence to complete a single network Output of grid block logical surface information and logical surface geometric data; complete the output of logical surface information and logical surface geometric data of all grid blocks of multi-block structured grids, and generate compressed storage files of multi-block structured grids. The present invention encodes and compresses the geometric data of the original grid by extracting the logical surface information and logical surface geometric data of a single-block structured grid, and then stores the grid logical surface information and logical surface geometric data to reduce the storage space of the grid data , and can restore all grid geometry data without loss, with small storage space and high storage efficiency.

Description

technical field [0001] The invention relates to the grid field of numerical simulation, in particular to the field of multi-block structured grid storage in Computational Fluid Dynamics (CFD), in particular to a multi-block structured grid data compression and storage method, decompression method and device . Background technique [0002] With the rapid development of computer technology and parallel computing methods, CFD (Computational Fluid Dynamics) simulation capabilities have improved rapidly, and it has become an important tool in aerospace vehicle design and performance evaluation, which can realize the numerical value of complex flows in various aircraft Simulation provides high-precision flow field calculation data for aircraft design, supports the optimization and improvement of aircraft design schemes, and expands the performance boundaries of aircraft. [0003] CFD discretizes the flow field space by calculating the grid, and then solves the algebraic discrete ...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the storage and transmission crisis caused by the current use of all geometric data storage formats, as well as the resulting increase in storage costs. The present invention proposes a multi- Block structure grid data compression storage and decompression method, by extracting the logical surface information and logical surface geometric data of a single block structure grid, encoding and compressing the geometric data of the original grid, and then storing the grid logical surface information and logical surface Geometric data, reducing the storage space of grid data, when the grid is to be used, use the corresponding decompression method to recover all grid geometric data without loss, with small storage space and high storage efficiency

Images