Engr Help

Finite Volume Analysis: Application of Conservation of Energy

Example 1 (continued)

Step 1

Identify (draw) the control surface and control volume for the fluid flow.

Show the unit outward normals (n₁ and n₂) to surfaces across which flow occurs. See figure below.

Step 2a

Write the general equation for conservation of energy.

. .

                   ∂/∂t ∫ e ρ dV + ∫ e ρ V . n dS = Q _{net
in} + W_shaft _{net in}
                         cv               cs

where e = u + p/ρ + ½ V² + gz note units: ft lb/slug or Nm/kg