Heat Transfer Mind Map

Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy (heat) between physical systems.

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Outline

Heat-Transfer-Mind-Map

Conduction

Definition

flow of heat

high to low temperature

without movement of matter as a whole

energy transferred by particle collisions

Medium

Solids - best conductors because particlesjoined together

Good conductor

Metals because offree electrons

Bad conductors(Insulators)

Air

Foam, expanded polystyrene, jablo, feathersetc. - all trap air so very good insulators

Gases - worst conductors as particles are farapart

ConVection

Definition

from high to low temperature

flow of heat

with movement of fluid as a whole

Medium

in fluids (liquids and gases)

Convection Current (Flow)

Hot air rises

Expands so less dense

Cold air sinks

More dense

Radiation

Definiton

Flow of heat

From high to low temperature

by electromagnetic waves

Medium

Solids, Liquids and Gases

Passes through a vacuum (no air)

Colours

Matt Black - best absorber and emiitter

Shiny Silver - worst absorber and emitter -very good reflector