Contents Chapter 2: Basic Governing Equations | 2.1. Conservation Equations for Turbulent Reacting Flow | Print page 2.1.2. Fluid Continuity Equation The summation of Equation 2–1 over all species gives the continuity equation for the total gas-phase fluid:(2–2) « 2.1.1. Species Conservation Equation 2.1.3. Momentum Conservation Equation »