CONTINUITY EQUATION

Consider the flow of steam through a nozzle.

Let ṁ = steady state mass flow rate of steam, kg/s

   A = cross-sectional area of nozzle normal to the direction of steam flow at any section, m²

   v = specific volume of steam at the same section, m³/kg

   c = velocity of steam across the section, m/s

Then for steady flow of steam through the nozzle,

Equation (6.1) is the continuity equation for steam flow through the nozzle.