Senthur Polytechnic College Mechanical Engineering student Vignesh G presented on methods of heat transfer for a seminar. The three main methods are conduction, convection, and radiation. Convection is defined as the transfer of heat through the movement of particles over large distances, such as heating water in a tin can using a Bunsen burner or atmospheric heating by the sun. Examples are given using a flask-Dewar's bottle and the atmosphere to illustrate convection.

1. SENTHUR POLYTECHNIC COLLEGE
DEPARTMENT OF MECHANICAL ENGINEERING
4020520/ THERMAL ENGINEERING
SEMINAR PRESENTATION
Submitted by
S E M I N A R T O P I C
M E T H O D O F H E A T T R A N S F E R
S U B M I T T E D B Y
V I G N E S H . G
( 2 2 2 1 6 4 0 5 )

3. Conduction
Convection
Radiation

4. DEFINITION
Theprocess,inwhichheatenergyis
transferredfromonesystemto another
systemduetomovementof particles
throughlargedistances,is called
convection.

5. A good example would be heating a tin can of water using a
Bunsen burner. Initially the flame produces radiation which
heats the tin can. The tin can then transfers heat to the water
through conduction. The hotwater then rises to the top, in the
convection process.
The atmosphere would be another example. The
atmosphere is heated by radiation from the Sun, the
atmosphere exhibits convection as hot air near the equator
rises producing winds, and finally there isconduction between
air molecules, and small amounts of air-land conduction.

6. FLASK – DEWAR’S
BOTTLE

7. THANKS YOU