ADVANCED THERMAL ENGINEERING
INTRODUCTION
Heat transfer describes the exchange of thermal energy, between physical systems depending
on the temperature and pressure, by dissipating heat. The fundament
FLOW OVER FLAT PLATES
Flows over objects are categorized as external flows. E.g. flow over a flat plat, flow over
a turbine blade, flow over a cylinder or sphere.
Numerous engineering applications suc
Principles of convection
Similarities between transport of momentum and heat
The Cauchy momentum equation is a vector partial differential equation put forth
by Cauchy that describes the non-relativis
PRINCIPLES OF CONVECTION: AN INTRODUCTION TO
HYDRODYNAMIC AND THERMAL BOUNDARY LAYERS
Convective heat transfer coefficient
The heat transfer coefficient or film coefficient, in thermodynamics and in m
Flows over cylinders and spheres
The characteristic length for a circular tube or sphere is the external diameter, D, and the Reynolds
number is defined:
=
The critical Re for the flow across spher
PRINCIPLES OF CONVECTION:
FUNDAMENTAL EQUATIONS OF CONVECTION TRANSFER IN
BOUNDARY LAYERS
Conservation of mass
1. In a steady flow, the net rate in which mass enters the control volume (inflow-outflo