1. Introduction

Boiling is the transition from liquid to vapor via formation (or nucleation) of bubbles. It typically requires heat addition. The heat required to vaporize a unit mass of liquid is latent heat of vaporization.

  • When a liquid is in contact with a surface—maintained at a temperature above the saturation temperature of the liquid, boiling will eventually occur at that liquid-solid interface.

  • Conventionally, based on the relative bulk motion of the body of a liquid to the heating surface, the boiling is divided into two categories:

    • pool boiling, and

    • convective boiling