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A Method of Predicting Thermal Conductivity of Materials Based on Finite Difference Method of Three-Dimensional Images

A finite difference method and three-dimensional image technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as loss of numerical simulation, increase of computer resources in analysis time, etc., to improve computing speed, save computing time, The effect of saving system resources and computing time

Active Publication Date: 2018-02-23
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the object is some large or three-dimensional images with very fine structure, the analysis time and required computer resources will be greatly increased due to the exponential increase of the number of nodes and unit bodies, which may lose the advantages of simple and fast numerical simulation

Method used

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  • A Method of Predicting Thermal Conductivity of Materials Based on Finite Difference Method of Three-Dimensional Images

Examples

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Embodiment 1

[0088] Example 1: Prediction of thermal conductivity along the spray direction of a plasma sprayed yttria stabilized zirconia (YSZ) coating.

[0089] This example takes the plasma sprayed YSZ coating as an example to demonstrate the prediction process of the present invention for the thermal conductivity of porous materials.

[0090] Adopt the present invention to predict the thermal conductivity of ion-sprayed yttrium oxide stabilized zirconia (YSZ) coating, comprise the following steps:

[0091] (1) Reconstruct the three-dimensional image of the plasma sprayed YSZ coating structure, such as image 3 shown; image 3 is a three-dimensional reconstruction image (300×300×300 pixels) of the plasma sprayed yttria stabilized zirconia (YSZ) coating of the present invention. The black in the picture is the pores and cracks, and the white is YSZ.

[0092] (2) Using a computer language program, the image 3 The image shown is read into memory and stored in a three-dimensional matri...

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Abstract

The invention relates to a method for predicting the thermal conductivity of a material based on a finite difference method of a three-dimensional image, which belongs to a method for predicting the thermal conductivity of a material by a difference method, and is specifically a method for predicting the thermal conductivity of a material by using a three-dimensional image of a material combined with a finite difference method. The basic principles are: 1. Use image analysis method to distinguish different phases or components in the image; 2. Use computer language programs to read the position and color information of all pixels into the computer memory; 3. Build each pixel into a A cell is given its thermal conductivity according to its component; 4. Discrete the steady-state heat conduction equation, calculate the heat transfer coefficient matrix, and construct a calculation equation system; 5. Calculate the equation system to obtain the temperature field; 6. Calculate the equivalent heat of the material Conductivity. The invention adopts a three-dimensional model, and can obtain the thermal conductivity result more accurately; adopts a finite difference method, and can save calculation time and memory consumption. The whole process is completed automatically, which is very practical for models with a large number of nodes.

Description

technical field [0001] The invention relates to a method for predicting the thermal conductivity of a material by numerical simulation, in particular to a method for predicting the thermal conductivity of a material based on a finite difference method of a three-dimensional image. Background technique [0002] The performance of a material plays a decisive role in its use efficiency, so testing the performance of a material is a homework that must be done before using it. However, for the design of structural materials, it is often necessary to change the structure of the material frequently in order to obtain the desired performance, which requires a lot of testing work. Predicting the performance of materials through material structure can greatly shorten the cycle of material design, so it is widely used in composite material design and other fields. Traditional prediction methods generally use two methods: 1) theoretical calculations based on ideal assumptions and 2) em...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 乔江浩谭娜刘洪涛张德坤
Owner CHINA UNIV OF MINING & TECH
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