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Faculty of Technology, University of East Sarajevo , Lukavica , Bosnia and Herzegovina
Faculty of Technology, University of Novi Sad , Novi Sad , Serbia
Faculty of Technology, University of East Sarajevo , Lukavica , Bosnia and Herzegovina
Faculty of Technology, University of Novi Sad , Novi Sad , Serbia
Faculty of Technology, University of East Sarajevo , Lukavica , Bosnia and Herzegovina
High Agricultural School of Vocational Studies , Sabac , Serbia
Faculty of Technology, University of East Sarajevo , Lukavica , Bosnia and Herzegovina
The heat transfer operation is extremely important in various technologies, especially in the rubber industry for crosslinking and for all the steps in the process of obtaining products from elastomeric materials. The speed at which the heat can be transferred to the rubber compound or taken away from it affects the design of the process equipment as it controls the rate of mixing, shaping and vulcanization. Turbulent heat transfer between the rubber compound and steel equipment is very complex due to the large conversion of mechanical energy into heat. Convective heat transfer with air, fluids or steam is also present in the fabrication of elastomeric products. In this work the heat transfer for the laminar and turbulent region of the boundary layer as well as the variation of the local resistance coefficient and the coefficient of heat transfer in the parallel flow of the fluid over the flat plate were analyzed. The relations are given for the determination of Reynolds and Nusselt numbers for characteristic flow fields, which will allow calculation of the heat flow. Also, a graphic representation of the average heat transfer coefficient for a flat plate in the combination of laminar and turbulent flows is given, which is of particular importance in industry. Relationships in one example concerning the cooling of the heated plate by air flow natural convection in the case of different flow directions are shown.
thermodynamic, rubber industry, convection heat transfer, coefficient of heat transfer, heat flow
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