Heat Transfer

Heat Transfer is one of the most important subject in mechanical Engineering. It is Inter related with some core mechanical subjects like IC EngineMachine DesignDesign of Machine Elements etc.

What is Heat Transfer : –

Heat transfer is the exchange of thermal energy between physical systems. The rate of heat transfer is dependent on the temperatures of the systems and the properties of the intervening medium through which the heat is transferred. The three fundamental modes of heat transfer are conduction, convection and radiation.


Syllabus of Heat Transfer : –

Fundamental: Modes of heat transfer, effect of temperature on thermal conductivity of different solids, liquids and gases, derivation of generalized equation in Cartesian, cylindrical and spherical coordinates and its reduction to specific cases, General laws of heat transfer

Conduction: Fourier’s law, One dimensional steady state conduction, heat conduction through plane and composite walls, cylinders and spheres, electrical analogy, critical radius of insulation for cylinder and sphere, overall heat transfer coefficient. Transient heat conduction- lumped heat capacity analysis, time constant, transient heat conduction in solids with finite conduction and convective resistances Heat transfer from extended surface: Types of fin, heat flow through rectangular fin, infinitely long fin, fin insulated at the tip and fin losing heat at the tip, efficiency and effectiveness of fin, Biot number, Estimation of error in temperature measurement in a thermometer well

Convection: Newton’s law of cooling, Dimensional analysis applied to forced and free convection, dimensionless numbers and their physical significance, empirical correlations for free and forced convection Continuity, momentum and energy equations, thermal and hydrodynamic boundary layer, Blasius solution for laminar boundary layer, General solution of Von-Karman integral momentum equation

Radiation: Absorptivity, reflectivity and transmissivity, black, white and grey body, emissive power and emissivity, laws of radiation – Planck, Stefan-Boltzmann, Wein’s displacement, Kirchhoff’s law, intensity of radiation and solid angle, Lambert’s cosine law Radiation heat exchange between black bodies, shape factor, heat exchange between non-black bodies- infinite parallel planes and infinite long concentric cylinders, radiation shield, heat exchange between two grey surfaces, electrical analogy

Heat exchanger: Classification, heat exchanger analysis, LMTD for parallel and counter flow exchanger, condenser and evaporator, overall heat transfer coefficient, fouling factor, correction factors for multi pass arrangement, effectiveness and number of transfer unit for parallel and counter flow heat exchanger, introduction of heat pipe and compact heat exchanger

Two-phase heat transfer: Boiling of liquids, Pool boiling curve, different types of pool boiling, condensation of vapor. Film wise & drop wise condensation.


Books For Heat Transfer : –

Reference Books:

  1. Heat & Mass Transfer by P.K. Nag
  2. Heat and Mass Transfer: Fundamentals and Application by Yunus Cengel
  3. Fundamental of Heat and Mass Transfer by Incropera and Dewitt
  4. Heat Transfer by Mills and Ganesan
  5. Heat Transfer by J P Holman
  6. Heat and Mass Transfer by R K Rajput
  7. Heat Transfer: Principles and Applications by Dutta, Binay K

Available ebooks:

Heat and Mass Transfer By R.K.Rajput Pdf


MCQs for Heat Transfer : –

Heat Transfer MCQ with Answers