Heat and Mass Transfer (PCMET503) Syllabus

Conduction heat transfer: modes of heat transfer, mechanisms and laws, thermal conductivity, convective and overall heat transfer coefficients. General heat conduction equation in three dimensions through plane (derivation needed), cylindrical and spherical (equation only) walls, initial and boundary conditions, one-dimensional steady state heat conduction, thermal resistance, critical radius, conduction with heat generation. Transient heat conduction: lumped system analysis, bodies with non-negligible internal temperature gradient. Extended surfaces: fin classification, heat transfer rate (rectangular fin, pin fin), fin effectiveness and efficiency. Introduction to finite difference method for steady state heat conduction.

Convection heat transfer: forced convection, thermal and hydrodynamic boundary layers (internal/external flows), thermal and momentum diffusivity, fluid friction and heat transfer relationship, developing/developed flows, non-dimensional numbers. External heat convection from flat plate/cylinder/sphere (laminar and turbulent); internal heat transfer in a circular pipe (laminar and turbulent); analogy between heat and momentum transfer. Natural convection: from vertical plate, horizontal and vertical cylinder. Heat exchangers: classification, design considerations, compact heat exchangers, fouling effects, LMTD and NTU methods, introduction to heat pipes.

Radiation heat transfer: basic laws, black/gray/diffuse/real surfaces, emission characteristics and laws of black body radiation, solid angle and radiation intensity, radiation heat exchange between infinite and finite surfaces, shape factors, radiation heat exchange between infinite parallel diffuse gray surfaces, electrical network analogy, radiation shields, conduction shape factor.

Mass Transfer: introduction, diffusion coefficient, Fick's law of diffusion, steady state diffusion in stationary and moving medium, diffusion through a membrane. Convective mass transfer: non-dimensional numbers, analogy between heat and mass transfer, correlations. Cooling of electronic equipment: methods and influencing factors. Electric battery cooling: phase change material, fin cooling, air cooling, liquid cooling (description only).