A heat sink is an electronic device made of good thermal conducting material and usually attached to an electronic device to dissipate the unwanted heat.
It works by increasing the device's working surface area & the amount of low-temperature fluid that moves across its enlarged area.
WORKING
Factors affecting its performance are:
Thermal Resistance Airflow Volumetric resistance Fin density Fin spacing Width Length
Types Of Heat Sinks
2. Passive Heat Sinks
1. Active Heat Sinks
Aluminum is the most common material for heat sinks. In particular, extruded aluminum heat sinks fit the needs of most projects. The metal is lightweight and has relatively good thermal conductivity.