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High-efficiency parallel simulation method for electric propulsion plume plasma

A technology of plasma and simulation methods, applied in design optimization/simulation, electrical digital data processing, special data processing applications, etc., can solve problems such as consuming large computing time and reducing computing time, and achieve good parallel computing performance and portability good sex effect

Inactive Publication Date: 2018-07-10
CHINA ACADEMY OF SPACE TECHNOLOGY
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Problems solved by technology

However, since the numerical simulation of the plasma plume requires a lot of computing time due to its time scale and spatial scale limitation, it is necessary to use various acceleration methods to reduce the computing time under the premise of ensuring the calculation accuracy

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  • High-efficiency parallel simulation method for electric propulsion plume plasma
  • High-efficiency parallel simulation method for electric propulsion plume plasma
  • High-efficiency parallel simulation method for electric propulsion plume plasma

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Embodiment Construction

[0037] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the public implementation manners of the present invention in detail with reference to the accompanying drawings.

[0038] The invention provides a high-efficiency electric propulsion plume plasma parallel simulation method, which realizes the solution of large-scale linear equations through algorithm optimization. refer to figure 1 , shows a schematic diagram of bandwidth of a large-scale sparse matrix before optimization in an embodiment of the present invention. It can be seen that no matter what kind of total stiffness matrix storage method is used, reducing the bandwidth and contour of the matrix is ​​of great significance to the efficiency of solving linear equations. Among them, the maximum bandwidth is closely related to the node number of each unit of the grid, and the corresponding node numbers are different, and the maximum ba...

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Abstract

The invention discloses a high-efficiency parallel simulation method for an electric propulsion plume plasma. The method comprises the following steps that: according to the adjacency matrix M of a grid node, generating an undirected graph; resorting the vertex of the undirected graph G, and numbering to obtain minimum bandwidth and the sorting array of a contour; and according to the sorting array, carrying out particle data structure design, and realizing the solving of a large sparse equation. Through the method, the solving operation of the large matrix and the vector of a large engineering flow field calculation problem is realized, calculation time in the numerical simulation process of the plasma plume is greatly shortened, and efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of plasma numerical simulation, in particular to a high-efficiency electric propulsion plume plasma parallel simulation method. Background technique [0002] Through numerical simulation, various physical parameters of the electric propulsion plume field can be obtained, so that the interaction effect of the plume on the spacecraft can be calculated. However, the electric propulsion space plume field includes several flow states such as complex continuous medium flow (the core region of the plume), flow in the transition domain and free molecular flow (the peripheral region of the plume). The core area of ​​the plume is a continuous flow, and the periphery is a transitional domain flow and free molecular flow. The high-altitude plume flow is extremely complicated, and it is difficult to use a method to describe it. [0003] Taking the commonly used direct simulation Monte Carlo method as an example, the dir...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 林骁雄温正王敏王珏魏鑫仲小清彭维峰李烽
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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