Method for realizing numerical simulation of indoor thermal environment by utilizing air thin layer arranged at inner surface of building

Abstract

The invention relates to a method for realizing the numerical simulation of an indoor thermal environment by utilizing an air thin layer arranged at the inner surface of a building. The operation of computing is carried out by using numerical simulation software for a thermal environment. The method for realizing the numerical simulation of the indoor thermal environment by utilizing the air thin layer arranged at the inner surface of the building is characterized in that when the temperature of an inner wall face is adopted, i.e. a first class of boundary condition is used as the boundary condition of the numerical simulation of the inner wall face, and when the grid division of a computing domain is also carried out, an air thin layer is arranged along the normal direction of the inner wall face of an enclosure structure, and the arranged air thin layer is an air layer clinging to the surface of a building and is also changed along with the change of the shape of the surface of the building; and the thickness of a bottom layer of an air boundary layer at the surface of the building is simulated by the thickness of the air thin layer. The grid division of the thickness of the air thin layer constructed along the normal direction of the inner wall face of the enclosure structure is at least greater than 1 grid number. According to the method for realizing the numerical simulation of the indoor thermal environment by utilizing the air thin layer arranged at the inner surface of the building, the air boundary layer at the surface of the building is simulated by utilizing the air thin layer, so that an actual situation is fully embodied in the heat exchange of the surface. The method is simple and is easy to realize; and moreover, the computing workload is less. The method for realizing the numerical simulation of the indoor thermal environment by utilizing the air thin layer arranged at the inner surface of the building is suitable for an occasion in which an indoor thermal environment is formed by the convective heat exchange of the surface of a building.

Description

technical field [0001] The invention relates to a method for realizing indoor thermal environment numerical simulation by setting an air thin layer on the inner surface of a building, belonging to the technical field of simulation calculation of the indoor thermal environment of a building; it is suitable for occasions where the indoor thermal environment is formed by convective heat transfer on the building surface. Background technique [0002] With the continuous development of computer technology, the application field of computational fluid dynamics numerical simulation technology is becoming wider and wider. In the study of building thermal environment, numerical simulation technology has become one of the main research methods, and many numerical simulation software have emerged. Thermal environment numerical simulation software is generally a software that uses the basic control equations of computational fluid dynamics, such as partial differential equations such as ...

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Problems solved by technology

Because the grid size of the building surface is sometimes difficult to match the set wall function, the heat transfer on the building surface cannot be consistent with the actual situation, which leads to the deviation of the indoor thermal environment simulation results from the actual

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