This preview shows page 1. Sign up to view the full content.
Chapter 2
Heat Conduction Equation
Chapter 2
HEAT CONDUCTION EQUATION
Introduction
21C
Heat transfer is a
vector
quantity since it has direction as well as magnitude. Therefore, we must
specify both direction and magnitude in order to describe heat transfer completely at a point. Temperature,
on the other hand, is a scalar quantity.
22C
The term
steady
implies
no change with time
at any point within the medium while
transient
implies
variation with time
or
time dependence.
Therefore, the temperature or heat flux remains unchanged with
time during steady heat transfer through a medium at any location although both quantities may vary from
one location to another.
During transient heat transfer, the temperature and heat flux may vary with time
as well as location. Heat transfer is onedimensional if it occurs primarily in one direction. It is two
dimensional if heat tranfer in the third dimension is negligible.
This is the end of the preview. Sign up
to
access the rest of the document.
 Fall '10
 Dr.DanielArenas
 Thermodynamics, Mass, Heat

Click to edit the document details