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Numerical simulation method of thermophysical transmission under multi-scale framework

A numerical simulation and thermal physics technology, applied in the field of digital simulation calculation of heat and moisture transmission, can solve the problem of ignoring the thermal interaction between clothing and human body

Inactive Publication Date: 2018-10-12
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

In these studies, the human body or clothing system is considered through simple processes / coefficients or steady state, spatially non-uniform and time-varying environments cannot be simulated with accurate results
The latest research proposes some algorithms for simulating heat and mass transfer of fabrics or garments, ignoring the thermal interaction between the garment and the human body

Method used

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  • Numerical simulation method of thermophysical transmission under multi-scale framework
  • Numerical simulation method of thermophysical transmission under multi-scale framework
  • Numerical simulation method of thermophysical transmission under multi-scale framework

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Embodiment 1

[0147] Aiming at the multiscale sizes of human body, fabric, fiber material and PCM particles, the present invention proposes a set of multiscale nonlinear models to accurately describe the mixed heat and moisture flux in a single entity. By proposing boundaries between different scales of the model to integrate the effects of their interactions. At the same time, thermal functional treatments of the garments, such as PCM coatings, moisture management treatments, waterproof membranes and self-heating technologies, were considered in the model. The invention adopts the discrete partial differential equation (PDE) of the finite volume method (FVM), and realizes the simulation through numerical solution.

[0148] Theoretically, the heat and moisture transfer in the clothing wearing system is multi-stage, and there is a hybrid coupling. The thermofluid processes involved include the following:

[0149] 1) The body responds to the heat transfer of biological heat from the externa...

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Abstract

The invention discloses a numerical simulation method of thermophysical transmission under a multi-scale framework, and proposes a set of multi-scale nonlinear model for describing mixed-type coupledheat and moisture transmission between human body, fabrics, fiber materials and phase change material particles; the multi-scale model integrates the dynamic thermal boundary condition between the above entities, and adopts coupled partial differential equation for description, wherein the partial differential equation is discretized through a finite volume method; at the same time, considering different wearing scenes, the scheme of digital simulation of smart warm clothing is proposed; in the engineering design process of the smart warm clothing, the simulation scheme proposed by the presentinvention can be used to evaluate the thermal intelligence quality of the clothing in advance, thereby reducing the design cost.

Description

technical field [0001] The invention relates to the field of digital simulation calculation of heat and moisture transmission, in particular to a numerical simulation algorithm of heat and humidity transmission under a multi-scale framework. Background technique [0002] As an innovative product with great commercial prospects, thermal smart clothing is characterized by providing high-quality thermal protection performance to the human body under various human wearing situations, such as being in extremely hot or cold environments. During the design process of thermal smart clothing, textile materials are usually combined with phase change material (PCM) particles, treated with moisture management, or applied with electric heating technology. Therefore, in the process of thermally intelligent clothing, engineering design methods should be adopted instead of traditional design methods. In this context, the complex thermal-fluid flow between the human body, clothing, and envi...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2113/12
Inventor 毛爱华罗洁李毅
Owner SOUTH CHINA UNIV OF TECH
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