Calculation of equivalent thermal conductivity of Gasar porous materials

摘要

On the basis of special features of porous structures of Porous materials Gasar (GASAR) were made three mathematical models of structural elements GASAR, including models with cylindrical, conical and elliptical pores, and accordingly obtained formulas for calculation of Equivalent thermal conductivity of three models by means of determination of minimal thermal resistance. It was discovered that if the three porous materials have the same porosity, then their coefficients of equivalent thermal conductivity are also the same. The test results show, that obtained formulas for calculation of equivalent thermal conductivity of porous materials have simple form and certain practical value; taking into consideration the thermal conductivity and the simplicity of their manufacture, GASAR with cylindrical pores are the most suitable materials for heat exchange and heat transfer.