Chapter 4. Air Cooling and Heat Sinks Available to Purchase

Simplicity and easy maintenance make direct air cooling a most attractive approach in cooling of electronics. This approach includes both active and passive methods. The former is related to forced convection while the latter represents free or natural convection. The passive cooling has always been the preferred choice. However, it is generally limited to the systems with very low heat dissipation because of poor heat transfer coefficients involved in the free convection.