Heat & Mass Transfer syllabus

Introduction and basic concepts: Introduction, Application areas of heat transfer. Basic modes of Heat Transfer, mechanisms and governing laws for these modes. Concept of 1D, 2D and 3D heat transfer. General three dimensional heat conduction equation in Cartesian coordinates (with derivation), cylindrical and spherical coordinates (no derivation). Thermal Conductivity, variable thermal conductivity, thermal diffusivity. (Simple numerical on modes and laws of transfer of heat transfer) One dimensional steady state heat conduction: One dimensional steady state heat conduction equation for the plane wall, cylinder and sphere, Overall heat transfer coefficient. Electrical Analogy - thermal resistance of composite structures and thermal contact resistance. Conduction with internal heat generation for plane wall, solid cylinder and solid sphere (Numerical on electrical analogy.)

Finned surfaces: Extended surface, types of fins, analysis of fins of uniform cross section area for temperature distribution and heat transfer rate for infinitely long & adequately long (with insulated end) fins. Fin efficiency & effectiveness. (Numerical on extended surfaces.) Thermal insulation and transient heat conduction: Thermal Insulation-types and selection, Critical radius of Insulation for cylinder and sphere, Unsteady state heat transfer, lumped heat capacity analysis, Heisler’s charts. Biot’s Number, Fourier’s Number & their significance. (Numerical on critical radius and lumped heat capacity.)

Basic concept of convection and forced convection: Concept of hydrodynamics & thermal boundary layer thickness, local and average heat transfer coefficient. Reynolds number, Prandtl number, Nusselt number. Empirical co-relations for external, internal flows, laminar & turbulent flow through conduits. (Numerical on forced convection with given empirical co-relations). Free or natural convection, boiling and condensation: Grashof’s number, Rayleigh number, flow over horizontal and vertical plate, Empirical co-relations for cylinders and sphere. Introduction to mass transfer: Introduction to mass transfer, diffusion using Fick’s Law of Diffusion, and basic applications. (Numerical on natural convection with given empirical co-relations).

Basic Concepts of Radiation: Radiation, spectrum of radiation, black body radiation, radiation intensity, Laws of radiation-Kirchhoff, Planck’s, Wien’s displacement law, Stefan Boltzmann & Lamberts Co-sine law. Emissivity, absorptivity, transmissivity, reflectivity, radiosity, emissive power, irradiation. (Simple numerical on basic radiation). Radiation heat exchange: Radiation heat exchange between surfaces, shape factor & its laws, radiation between parallel plates, cylinder & spheres. Radiation shields. (Numerical on Radiation shields).

Introduction & LMTD Method: Introduction and detailed classification of heat exchangers. Overall heat transfer coefficient, fouling factor and its effect on heat exchanger performance. Log Mean Temperature Difference (LMTD) method for heat exchanger analysis. (Numerical on LMTD Method). Effectiveness– NTU method: Effectiveness–NTU method for heat exchanger performance evaluation. Boiling and Condensation heat transfer: Pool boiling curve and regimes of pool boiling, Critical heat flux, film and drop wise condensation. (Numerical on Effectiveness-NTU Method).