Difference between revisions of "Contrib/CompressibleMixingPhaseChangeFoam"

Revision as of 20:04, 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: $\frac {\partial \alpha_l}{\partial t} + \nabla \cdot \left ( \alpha_l \mathbf{U} \right ) = \frac {\alpha_l}{\rho_l} \frac {d \rho_l}{dt} + \frac {S_l}{\rho_l}$

* Phase change model
* Momentum equation
* Energy equation

Solver sources and tutorials located here

@@ Line 2: / Line 2: @@
 == Model Equations ==
- === Equation of state ===
+* Equation of state
- === Liquid volume transport ===
+* Liquid volume transport
 Let us consider transport of liquid (heavy phase) volume fraction <math>\alpha_l</math>:
 <math>
 \frac{\partial \alpha_l \rho_l}{\partial t} + \nabla \cdot
@@ Line 15: / Line 16: @@
-<math>
+By converting to volume fluxes we get:
-\frac{\partial{T}}{\partial t} + \nabla \cdot \left(\mathbf{U} T\right) - \nabla \cdot \left( (D_T + \nu_{turb}/Sc_{turb}) \nabla T \right) = 0
+<math>
+\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 {S_l}{\rho_l}
 </math>