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SYLLABUS

UNIT-I

Introduction Modes and mechanisms of heat transfer – Basic laws of heat transfer – General applications of heat transfer. Conduction heat transfer Fourier rate equation – General heat conduction equation in cartesian, Cylindrical and spherical coordinates. simplification and forms of the field equation – Steady, Unsteady and periodic heat transfer – Boundary and initial conditions. One Dimensional Steady State Heat Conduction In homogeneous slabs, Hollow cylinders and spheres – Overall heat transfer coefficient – Electrical analogy – Critical radius/thickness of insulation – With variable thermal conductivity – With internal heat sources or heat generation.

UNIT-II

Heat transfer in extended surface (fins) – Efficiency, Effectiveness and temperature distribution on long fin, Fin with insulated tip and short fin, Application to errors in temperature measurement. one dimensional transient heat conduction In systems with negligible internal resistance – Significance of biot and fourier numbers – Chart solutions of transient conduction systems – Problems on semi-infinite body.

UNIT-III

Convective Heat Transfer Dimensional analysis – Buckingham π theorem and its application for developing semi – Empirical non-dimensional correlations for convective heat transfer – Significance of non-dimensional numbers – Concepts of continuity, Momentum and energy equations. Forced Convection External Flows Concepts of hydrodynamic and thermal boundary layer and use of empirical correlations for convective heat transfer for flow over – Flat plates, Cylinders and spheres. Internal Flows Division of internal flow through concepts of hydrodynamic and thermal entry lengths – Use of empirical relations for convective heat transfer in horizontal pipe flow, Annular flow. Free Convection Development of hydrodynamic and thermal boundary layer along a vertical plate – Use of empirical relations for Convective heat transfer on plates and cylinders in horizontal and vertical orientation.

UNIT-IV

Heat Transfer with Phase Change Boiling Pool boiling – Regimes, Determination of heat transfer coefficient in nucleate boiling, Critical heat flux and film boiling. Condensation Filmwise and dropwise condensation – Nusselt’s theory of condensation on a vertical plate – Film condensation on vertical and horizontal cylinders using empirical correlations. Heat Exchangers Classification of heat exchangers – Overall heat transfer coefficient and fouling factor – Concepts of LMTD and NTU methods – Problems using LMTD and NTU methods.

UNIT-V

Radiative Heat Transfer Emission characteristics and laws of black-body radiation – Irradiation – Total and monochromatic quantities – Laws of planck, Wien, Kirchoff, Lambert, Stefan and boltzmann – Heat exchange between two black bodies – Concepts of shape factor – Emissivity – Heat exchange between gray bodies – Radiation shields – Electrical analogy for radiation networks.