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A Multi-block Structured Grid Data Compression Storage Format

A grid data, compressed storage technology, applied in the field of data processing, can solve the problems of data storage difficulties, increase the risk of data loss, increase storage cost consumption, etc., and achieve the effect of reducing the size

Active Publication Date: 2022-05-27
CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

As the scale of grid data increases, the above storage formats bring great challenges to the storage and transmission of grid data. For example, a grid with a structure of 10 million nodes in a single block adopts the double-precision Plot3D format, and the binary type storage accounts for about With 228Mb disk space, the text type storage takes up about 700Mb disk space, and the required data storage space is large
However, aerodynamic optimization design, unsteady flow simulation, and load calculation analysis usually involve a large number of grids with different computing states, which will bring greater difficulties to data storage. Repeated access to storage units will accelerate the aging of storage hardware and increase the risk of data loss. , sharply increase the consumption of storage costs
Therefore, in view of the problems of large disk space occupied and low transmission efficiency faced by the current large-scale structured grid data storage, the present invention proposes a multi-block structured grid data compression storage format

Method used

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  • A Multi-block Structured Grid Data Compression Storage Format
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[0033] All features disclosed in this specification, or all disclosed steps in a method or process, may be combined in any way except mutually exclusive features and / or steps.

[0034] Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), unless expressly stated otherwise, may be replaced by other equivalent or alternative features serving a similar purpose. That is, unless expressly stated otherwise, each feature is but one example of a series of equivalent or similar features.

[0035]Step 1: Determine the content to be stored according to the multi-block structured grid data. The specific storage content is as follows:

[0036] 1) The total number of grid blocks N block , figure 1 The number of grid blocks N of the multi-block structured grid shown in block =4;

[0037] 2) The number of grid points NI in the 3 logical directions of any single grid block s , NJ s , NK s , where s∈[1,N block ]. On each grid block, i, ...

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Abstract

The invention discloses a multi-block structure grid data compression storage format, which describes the storage mode, storage content and storage order of the grid data in the grid compression storage file. First, in order to significantly reduce the size of the grid compression storage file, In the storage format proposed by the present invention, the grid data is stored in binary mode. Then, the multi-block structure grid data information, including the number of grid blocks, the number of grid points in three logical directions of a single grid block, and the coordinate data of grid points in six logical planes of a single grid block, are placed in a specific order. The grid data is stored in a compressed file; the invention can provide an efficient and feasible data storage format for the compressed storage of multi-block structured grid data.

Description

technical field [0001] The invention relates to the field of data processing, in particular to a multi-block structured grid data compression storage format in the field of multi-block structured grid data storage in Computational Fluid Dynamics (CFD). Background technique [0002] With the rapid development of computer technology and parallel computing methods, computational fluid dynamics simulation capabilities have improved rapidly, and it has become an important tool in aerospace vehicle design and performance evaluation. The high-precision flow field calculation data supports the optimization and improvement of the aircraft design scheme and expands the performance boundary of the aircraft. [0003] Computational fluid dynamics discretizes the computational space through grids, solves the algebraic equations iteratively, and obtains the flow field variables in the specified space and time, thereby integrating the overall flow characteristics of the flow around the obje...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F16/174
CPCG06F16/1744
Inventor 周乃春孙岩赵莹孟德虹江盟牟斌白汉利刘旺林邓彦增邓学霖
Owner CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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