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A boundary treatment method for effectively controlling the temperature in a natural convection cavity with a partition

A technology of natural convection and boundary treatment, applied in the field of heat convection heat transfer, which can solve the problems of no contribution to heat transfer and unfavorable efficient heat transfer of the system.

Active Publication Date: 2021-05-18
SUN YAT SEN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The white area in the figure represents the insulation partition plate, and the colored area represents the temperature. There is a cavity with an overall temperature of almost 0 in the system, and this cavity does not contribute to the heat transfer of the system, which is not conducive to the efficient heat transfer of the system.

Method used

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  • A boundary treatment method for effectively controlling the temperature in a natural convection cavity with a partition
  • A boundary treatment method for effectively controlling the temperature in a natural convection cavity with a partition
  • A boundary treatment method for effectively controlling the temperature in a natural convection cavity with a partition

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] Under the boussinesq assumption, the calculation equation of the dimensionless two-dimensional RB heat convection is

[0032]

[0033]

[0034]

[0035] Where V is the velocity, P is the pressure, θ is the temperature, the dimensionless parameter Ra in the equation is the Rayleigh number, and Pr is the Prandtl number. The calculation boundary conditions are that the lower base plate is heating, the dimensionless temperature θ=0.5, and the upper base plate is cooling, the dimensionless temperature θ=-0.5. The velocity boundary condition is no-slip boundary, and the left and right side walls are adiabatic boundaries. The commonly used staggered grid is used, the calculation adopts the finite difference method, the time direction adopts the first-order precision, and the space adopts the second-order precision discrete format. In...

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Abstract

The invention proposes a boundary treatment method for effectively controlling the temperature in a natural convection cavity with a partition plate. By adopting the method of the present invention, before the constant temperature bottom plate is heated, local pulse heating is performed on the bottom plate at intervals to control the alternating appearance of cold and hot cavities in the system; through the control method of the boundary, it can effectively form a high-efficiency thermal alternate distribution of cold and heat in the system. transport channel.

Description

technical field [0001] The invention relates to the field of heat convection heat transfer, and more specifically relates to a boundary treatment method for effectively controlling the temperature in a natural convection cavity with a partition plate. Background technique [0002] Such as figure 1 As shown, the temperature field of the buoyancy convection system with a separator, the bottom plate is heated at a constant temperature, and the top plate is cooled at a constant temperature. The white area in the figure represents the insulation partition plate, and the colored area represents the temperature. There is a cavity with an overall temperature of almost 0 in the system, and this cavity does not contribute to the heat transfer of the system, which is not conducive to the efficient heat transfer of the system. Contents of the invention [0003] In order to solve the deficiencies of the prior art above, the present invention proposes a boundary treatment method for ef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/11
CPCG06F17/11
Inventor 林泽鹏包芸
Owner SUN YAT SEN UNIV
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