Notes for Heat Transfer - HT by AJAY KETAN NAYAK

Scope of the subject, the three modes of heat transfer-conduction, convection and radiation. Fourier conduction equation, Newton’s law of cooling and Stefan- Boltzmann equation for black body radiation. Simultaneous heat transfermechanisms.

Mechanism of conduction: Derivation of the generalized heat conduction equation in Cartesian coordinates,polar cylindrical and polar spherical coordinates.Different types of boundary conditions encountered in heat conduction problems

Extended Surfaces

Mechanism of convection and basic concepts: Dimensional analysis for forced and free convection, Nusselt number. Concept of thermal boundary layer, Prandtl number, Expressions for local and average values of heat transfer coefficients for a flat plate. Experimental correlations for forced and free convection for various geometries

Blackbody radiation, Planck’s law, Spectral and total emissive power, Wein’s displacement law, Spectral and total intensity of radiation, Radiation properties: emissivity, absorptivity, reflectivity and transmissivity, Kirchoff’s law

Types of heat exchangers and heat exchanger configurations.The overall heat transfer coefficient and fouling factor. LMTD and effectiveness-NTU analysis of heat exchangers