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Method for fast determining gas phase unstructured grid of solid particle

A technology of unstructured grids and solid particles, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as reducing calculation accuracy, improve speed and accuracy, improve accuracy, and reduce search times Effect

Inactive Publication Date: 2012-05-09
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of data averaging of multiple unstructured grids is mostly used to solve the problem. This process will inevitably sacrifice a large amount of gas phase field information and reduce the calculation accuracy.

Method used

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  • Method for fast determining gas phase unstructured grid of solid particle
  • Method for fast determining gas phase unstructured grid of solid particle
  • Method for fast determining gas phase unstructured grid of solid particle

Examples

Experimental program
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Embodiment 1

[0017] The numerical simulation of the gas phase flow field is usually carried out in two-dimensional or three-dimensional, and the two-dimensional case is described here, and the three-dimensional case can be deduced by analogy:

[0018] (1) For the unstructured grids divided by the gas phase calculation, first another set of structured grids is established to cover the entire calculation area, such as figure 1 As shown, the ellipse area is the unstructured grid solution area divided by the gas phase calculation, and the quadrilateral is the coverage area of ​​the established structured grid; (2) scan all the unstructured grids in the calculation area, and the The serial number of the covered unstructured grid is statistically registered, and an array is established for subsequent calculations; (3) For discrete particles that need to be searched for in the unstructured grid, first determine the additional structured grid in which the particle is located, and then solve the rel...

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Abstract

The invention discloses a method for determining a gas phase unstructured grid of a solid particle, which comprises the following steps of: (1) additionally establishing a set of structured grids to cover the whole computational domain in the unstructured grids divided by gas phase computation, wherein the structured grid has a size larger than that of the unstructured grid; (2) scanning all unstructured grids in the computational domain, statistically registering sequence numbers of the unstructured grids covered by each structured grid, and establishing an array for use in subsequent computation; and (3) determining the structured grid of a discrete particle of which the unstructured grids need to be searched for, solving distances between the discrete particle and all unstructured gridnodes in the structured grid, and determining the unstructured grid at the smallest distance away from the discrete particle as the unstructured grid of the particle. The method of the invention greatly improves the accuracy of numerical simulation and can remarkably reduce the times of searching for the unstructured grid of the particle so as to greatly increase the speed and improve the accuracy of gas-solid phase numerical computation.

Description

technical field [0001] The invention belongs to the field of computer numerical simulation of gas-solid two-phase flow, and in particular relates to a method for quickly determining the gas-phase unstructured grid where solid-phase particles are located. Background technique [0002] Gas-solid two-phase flow widely exists in the fields of energy, chemical industry, and environmental protection. With the rapid increase of computer speed, the computer numerical simulation technology of gas-solid two-phase flow has also developed rapidly, and has played an increasingly important role in actual production. important role. [0003] In the computer numerical simulation of gas-solid two-phase flow, an effective measure is to treat the gas phase field and the solid phase particle field separately, and use the Euler method and the Lagrangian method for numerical simulation, which can fully improve the calculation efficiency. efficiency and increase the accuracy of numerical simulati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 袁竹林朱立平彭正标
Owner SOUTHEAST UNIV