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Abstract Abstract： In order to analyze the relatively optimal air layer thickness of the horizontally enclosed square cavity based on its thermal insulation, this paper established a twodimensional numerical model and calculated the radiation and convection heat transfer in the horizontally closed square cavity at different temperature differences and different thermal conductivities of the solid boundary material by using the “Presto!” pressure interpolation scheme and SIMPLE (semiimplicit method for pressurelinked equations) decoupling algorithm. The relative optimal air layer thickness values of the horizontally closed square cavity at different temperature difference and thermal conductivity of the boundary material under a certain condition were obtained from the regression analysis of the results.
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Received: 14 August 2015
Published: 28 March 2016
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