Difference between revisions of "Contrib/CompressibleMixingPhaseChangeFoam"

Revision as of 20:05, 28 December 2012

Solver for two fluids with phase change (for example - water <---> steam), pressure and temperature density dependence

Model Equations

Equation of state
Liquid volume transport

Let us consider transport of liquid (heavy phase) volume fraction $\alpha_l$ :

$\frac{\partial \alpha_l \rho_l}{\partial t} + \nabla \cdot \left ( \alpha_l \rho_l \mathbf{U} \right ) = \dot m_l$

By converting to volume fluxes we get:

$\frac {\partial \alpha_l}{\partial t} + \nabla \cdot \left ( \alpha_l \mathbf{U} \right ) = \frac {\alpha_l}{\rho_l} \frac {d \rho_l}{dt} + \frac {\dot m_l}{\rho_l}$

* Phase change model
* Momentum equation
* Energy equation

Solver sources and tutorials located here

@@ Line 17: / Line 17: @@
 By converting to volume fluxes we get:
 <math>
 \frac {\partial \alpha_l}{\partial t} + \nabla \cdot
@@ Line 22: / Line 23: @@
   \alpha_l \mathbf{U}
 \right )
-= \frac {\alpha_l}{\rho_l} \frac {d \rho_l}{dt} + \frac {S_l}{\rho_l}
+= \frac {\alpha_l}{\rho_l} \frac {d \rho_l}{dt} + \frac {\dot m_l}{\rho_l}
 </math>