Abstract
The aim of this chapter is to provide a useful guide to quick mustering minimum knowledge required for the analysis of innovations with the aid of thermal calculations for the readers slightly familiar with this field of physics.Elementary level of presentation without compromising scientific strictness.
Heat transfer processes; three ways of heat transfer. Stationary and non-stationary processes. Heat conduction of simple-shaped and complex-shaped bodies. The thermal conductivity coefficient.
Convective heat exchange. Free (natural) convection and forced one. Laminar and turbulent motion of fluxes. Boundary layer. Formulae and tables for determination of the heat transfer coefficients between a wall and liquid (gas). Heat transfer between two fluid flows through a dividing wall. Thermal resistances and intensifying heat transfer processes.
Heat radiation. The coefficient of black body radiation. Emissivity of bodies. Radiation of solids, liquids, and gases. Radiant heat exchange between bodies.
Simplified formulaes for calculations of thermal processes in some furnace elements with the accuracy required in practice. Concept of numerical methods of calculating stationary and non-stationary heat conduction for complex-shaped bodies.
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Notes
- 1.
At velocities up to 120–150 m/s being very far from the speed of sound, gases behave as non-compressible liquids so that gas and liquid flows are governed by the same laws of motion. Therefore, as it is assumed in aero-hydromechanics when considering low-speed flows the terms “liquid” and “gas” are used as synonyms. Further, in many cases, the common term “fluid” will be used.
- 2.
The dependence of value ɛ on body temperature may not be taken into consideration in engineering calculations.
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© 2010 Springer-Verlag Berlin Heidelberg
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Toulouevski, Y.N., Zinurov, I.Y. (2010). The Fundamental Laws and Calculating Formulae of Heat Transfer Processes. In: Innovation in Electric Arc Furnaces. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-03802-0_3
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DOI: https://doi.org/10.1007/978-3-642-03802-0_3
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Publisher Name: Springer, Berlin, Heidelberg
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Online ISBN: 978-3-642-03802-0
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