Published 18 issues per year
ISSN Print: 1064-2285
ISSN Online: 2162-6561
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CONVECTIVE AND RADIATIVE THERMAL ANALYSIS OF COMPOSITE WALL WITH NONLINEAR TEMPERATURE-DEPENDENT PROPERTIES
ABSTRACT
Composite walls were investigated for thermal performance by the Adomian decomposition method (ADM). The thermal properties of a composite system, i.e., the thermal conductivity, heat transfer coefficient, and surface emissivity were considered temperature-dependent and hence were nonlinear. In addition, the internal heat generation was also assumed to be temperature-dependent. A thermal analysis was done, where the effects of conduction, convection, and radiation were involved. The analysis was carried out to evaluate the temperature within the walls using ADM, a semi-analytical technique. The results obtained from ADM were found to be in good agreement with that of differential transform method (DTM), present in the literature. The temperature distribution and performance parameter have been evaluated as explicit functions of input parameters. Furthermore, the variation of these outputs with respect to heating input parameters (such as conduction-convection parameter) was studied. The response of the functional form of temperature-dependent properties on the variation of output parameters has also been investigated. Last but not least, a case where convection and radiation sink temperatures were considered to be different has also been studied. The current work also reported the efficiency of the overall system. The critical parameters were determined which influence the efficiency of the current setup.
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