JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Prerequisites

Heat Transfer

Course objectives:

• To provide a thorough understanding of applications of convective heat transfer in various thermal systems.
• Students learn analytical and numerical solutions for convective heat transfer problems.

Course Outcome:

• Provide limited design experiences for systems requiring significant consideration to convective heat transfer

UNIT - I

Introduction to Forced, Free & Combined Convection – convective heat transfer coefficient – Application of dimensional analysis to convection – Physical interpretation of dimensionless numbers. Equations of Convective Heat Transfer: Continuity, Navier-Strokes equation & energy equation for steady state flows – similarity – Equations for turbulent convective heat transfer – Boundary layer equations for laminar, turbulent flows – Boundary layer integral equations.

UNIT - II

External Laminar Forced Convection: Similarity solution for flow over an isothermal plate – integral equation solutions – Numerical solutions – Viscous dissipation effects on flow over a flat plate. External Turbulent Flows: Analogy solutions for boundary layer flows – Integral equation solutions – Effects of dissipation on flow over a flat plate. Internal Laminar Flows: Fully developed laminar flow in pipe, plane duct & ducts with other cross-sectional shapes – Pipe flow & plane duct flow with developing temperature field – Pipe flows & plane duct flow with developing velocity & temperature fields. Internal Turbulent Flows: Analogy solutions for fully developed pipe flow –Thermally developing pipe & plane duct flow.

UNIT - III

Natural Convection: Boussineq approximation – Governing equations – Similarity – Boundary layer equations for free convective laminar flows – Numerical solution of boundary layer equations. Free Convective flows through a vertical channel across a rectangular enclosure – Horizontal enclosure – Turbulent natural convection.

UNIT - IV

Combined Convection: Governing parameters & equations – laminar boundary layer flow over an isothermal vertical plate – combined convection over a horizontal plate – correlations for mixed convection – effect of boundary forces on turbulent flows – internal flows - internal mixed convective flows – Fully developed mixed convective flow in a vertical plane channel & in a horizontal duct.

UNIT - V

Convective Heat Transfer Through Porous Media: Area weighted velocity – Darcy flow model – energy equation – boundary layer solutions for 2-D forced convection – Fully developed duct flow – Natural convection in porous media – filled enclosures – stability of horizontal porous layers.

R19 M.Tech. Thermal Engineering

TEXT BOOKS:

• 1. Introduction to Convective Heat Transfer Analysis/ Patrick H. Oosthuigen & David. Naylor /McGraw Hill.
• 2. Convective Heat & Mass Transfer /Kays & Crawford/TMH.
• 3. A Heat Transfer Text book by John H. Lienhard V, Phlogiston Press, Third Edition

REFERENCE BOOKS:

• 1. Convection Heat Transfer / Adrian Bejan/ Hardcover – Import, 17 May 2013.
• 2. Convective heat transfer, 3rd edition/ Yaman Yener/CRC press-2013.
• 3. Momentum, Heat, and Mass Transfer by Leo Lue. R19 M.Tech. Thermal Engineering M. TECH. II Year I Sem. (THERMAL ENGINEERING)