Numerical simulation method for solid/liquid phase change in high-temperature heat storage container in gravity condition

Abstract

The invention provides a numerical simulation method for solid / liquid phase change in a high-temperature heat storage container in a gravity condition. Numerical calculation is carried out for the complicated problem of phase change heat transfer while natural convection, cavitation and radiation conditions are simultaneously considered, technicians can acquire change of melting rate of solid / liquid phase change materials in the high-temperature heat storage container in a field and distribution of a flow field, a temperature field and liquid phase by the aid of a computer, and accordingly important references for optimizing the design of heat storage containers, suppressing cavitation, improving heat storage efficiency and reducing 'hot spots' and 'hot release'. By the aid of the numerical simulation method, the complicated problem of melting / solidification inside the high-temperature heat storage container in the gravity condition is simply and efficiently solved by the aid of a calculation program based on an enthalpy method, a finite control volume method and SIMPLE algorithm, and the numerical simulation method has important practical values.

Description

technical field [0001] The invention relates to a method in the field of computational fluid dynamics, in particular to a numerical simulation method for the solid / liquid phase transition in a high-temperature heat storage container under gravity conditions, that is, through the energy control equation of the enthalpy method under the condition of additional natural convection group to calculate. technical background [0002] The problem of solid-liquid phase transition, that is, the problem of heat transfer with melting or solidification peak surface movement, is also called the Stefen problem in commemoration of the German scientist J. Stefan's research on the thickness of polar ice. Since Franz Neumann studied the phase transition of semi-infinite objects in 1860, people have studied the solid-liquid phase transition for more than 100 years. Due to the nonlinear characteristics of this type of problem, it brings great difficulties to the solution of the problem. [0003...

AI Technical Summary

Problems solved by technology

[0012] The object of the present invention is to aim at the shortcomings and deficiencies of the prior art, to provide a numerical simulation method for the solid / liquid phase transition in a high-temperature heat storage container under gravity conditions, under the conditions of natural convection, cavitation and radiation, Numerical calculation of complex phase change heat transfer problems enables technicians to use computers to obtain the change in the melting rate of solid / liquid phase change material (PCM, Phase Change Material) in the on-site high-temperature heat storage container and the flow field and temperature during phase change Field and liquid phase distribution, so as to provide an important reference for optimizing the design of heat storage containers, suppressing cavitation, improving heat storage efficiency, and reducing "hot spots" and "thermal loosening" phenomena

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