👉DR. A.P.J ABDUL KALAM TECHNICAL UNIVERSITY LUCKNOW 3rd Year MECHANICAL ENGINEERING 5th semester Notes.
🔗note: every topic with blue colour means hyperlink is their, you can study every topic by clicking them.
Subject Code: KME 501 Heat and Mass Transfer L T P : 3 1 0 Credits: 4
UNIT‐1
Introduction to Heat Transfer
Introduction of thermodynamics and Heat Transfer, Modes of Heat Transfer: Conduction, convection and radiation, Effect of temperature on thermal conductivity of different types of materials, Introduction to combined heat transfer mechanism, General differential heat conduction equation in the rectangular,
cylindrical and spherical coordinate systems, Initial and system boundary conditions.
Steady State one‐dimensional Heat conduction
Simple and Composite Systems in rectangular, cylindrical and spherical coordinates with and without
energy generation, Concept of thermal resistance, Analogy between heat and electricity flow, Thermal
contact resistance and over‐all heat transfer coefficient, Critical radius of insulation for cylindrical, and
spherical bodies.
UNIT‐2
Fins
Heat transfer through extended surfaces and its classification, Fins of uniform cross‐sectional area, Error
in measurement of temperature of thermometer wells.
Transient Conduction
Transient heat conduction, Lumped capacitance method, Time constant, Unsteady state heat conduction
in one dimension only, Heisler charts and their applications.
UNIT‐3
Forced Convection
Basic concepts: Hydrodynamic boundary layer, Thermal boundary layer, Approximate integral boundary
layer analysis, Analogy between momentum and heat transfer in turbulent flow over a flat surface,
Mixed boundary layer, Flow over a flat plate, Flow across a single cylinder and a sphere, Flow inside
ducts, Thermal entrance region, Empirical heat transfer relations, Relation between fluid friction and
heat transfer, Liquid metal heat transfer.
Natural Convection
Physical mechanism of natural convection, Buoyant force, Empirical heat transfer relations for natural
convection over vertical planes and cylinders, horizontal plates, cylinders and sphere, combined free and
forced convection, Effect of turbulence.
UNIT‐4
Thermal Radiation
Basic concepts of radiation, Radiation properties of surfaces, Black body radiation Planck’s law, Wein’s
displacement law, Stefan‐Boltzmann law, Kirchhoff’s law, Gray body, Shape factor, Black‐body radiation,
Radiation exchange between diffuse non‐black bodies in an enclosure, Radiation shields, Radiation
combined with conduction and convection; Absorption and emission in gaseous medium; Solar radiation;
Greenhouse effect, Radiation network analysis.
UNIT‐5
Heat Exchanger
Different types of heat exchangers, Fouling factors, Overall heat transfer coefficient, Logarithmic mean
temperature difference (LMTD) method, Effectiveness‐number of transfer unit (NTU) method and
Compact Heat Exchangers.
Condensation and Boiling
Introduction of condensation phenomena, Heat transfer relations for laminar film condensation on
vertical surfaces and on outside& inside of a horizontal tube, Effect of non‐condensable gases, Drop wise
condensation, Heat pipes, Boiling modes, pool boiling, Hysteresis in boiling curve, Forced convection
boiling.
Introduction to Mass Transfer
Introduction of Fick's law of diffusion, Steady state equimolar counter diffusion, Steady state diffusion
through a stagnant gas film, Heat and Mass Transfer Analogy ‐Convective Mass Transfer Correlations
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