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Thermal rotating device simultaneously suitable for conduction, convection and radiation

A rotating device and a technology of rotation transformation, applied in the infrared field, can solve problems such as no coupling effect

Active Publication Date: 2020-02-21
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of the existing theories can deal with the coupled effects between conduction, convection, and radiation

Method used

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  • Thermal rotating device simultaneously suitable for conduction, convection and radiation
  • Thermal rotating device simultaneously suitable for conduction, convection and radiation
  • Thermal rotating device simultaneously suitable for conduction, convection and radiation

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Embodiment Construction

[0046] The present invention will be described in detail below in conjunction with specific examples and accompanying drawings, but the present invention is not limited thereto.

[0047] A 2D schematic of the thermal spin device is shown in figure 1 In , it is the annular area between the inner diameter and the outer diameter, where the heat flow rotates obviously, so it is called a heat rotator.

[0048] After theoretical derivation, the present invention utilizes the finite element simulation software COMSOL Multiphysics to simulate. The results of the two-dimensional thermal rotation transient simulation are shown in figure 2 . Among them, (a-d), (e-h) and (i-l) correspond to different situations of three initial temperature and initial speed settings, and it takes 80, 30 and 50 minutes to reach the steady state, respectively. In all three cases, the transient thermal rotation effect is perfectly displayed. The heat flow in the thermal rotator rotates obviously, and th...

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Abstract

The invention belongs to the technical field of infrared, and particularly relates to a thermal rotation device suitable for conduction, convection and radiation at the same time. The thermal rotationdevice of the present invention is obtained by performing rotation conversion on a specific region by coordinate conversion. For example, the thermal rotation device is obtained by rotating an angleof an annular area through coordinate transformation, material parameters of the thermal rotation device are determined, direction regulation and control of local heat flow are achieved, the local heat flow in the thermal rotation device is made to rotate, and meanwhile temperature distribution of the background is not affected. The method is not only suitable for a steady state condition, but also suitable for a transient state condition. The feasibility of the rotator device is verified through finite element simulation. Due to the fact that conduction, convection and radiation can be seen everywhere in the nature, the device has wide application value, for example, the heat flow direction can be changed to achieve recycling of waste heat.

Description

technical field [0001] The invention belongs to the field of infrared technology, and in particular relates to a thermal rotation device. Background technique [0002] Energy issues have always been the focus of attention, and thermal energy is no exception. As we all know, there are three ways of heat transfer, namely heat conduction, heat convection and heat radiation. Therefore, its effective operation has special significance for thermal management. As a general method, coordinate transformation has promoted the rapid development of thermal metamaterials, such as thermal cloaks, thermal concentrators, thermal rotators, thermal camouflage, etc. These thermal metamaterials only consider heat conduction. In recent years, several studies have considered thermal convection effects to facilitate the development of thermal metamaterials. However, none of the existing theories can deal with the coupled effects between conduction, convection, and radiation. In fact, radiatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G16C60/00G06F119/08
CPCG16C60/00
Inventor 黄吉平须留钧杨帅戴高乐
Owner FUDAN UNIV
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