VolumeVLE_L4

Created Freitag 12 Januar 2018

Generic finite volume model with 1D discretisation in flow direction with simplified momentum balance.

1. Purpose of Model

This model is appropriate for all flow cases where no fast pressure waves influence the flow field.

2. Further Details

For further details see VolumeVLE L4 Advanced as the models equal in all aspects except for the momentum balance

3. Momentum Conservation



If (close to) steady flows have to be modelled, a steady state momentum balance can be sufficient. Then we have

In this case we also neglect .

In the steady case it is not mandatory to use the staggered grid, since the momentum is computed directly from the pressure loss model.

4. Energy Conservation



According to [1] it is distinguished between the in-situ mixture specific enthalpy and the mixed-cup specific enthalpy . The mixed-cup enthalpy is calculated within the replaceable model for mechanical equilibrium. If the homogeneous model is chosen, the in-situ specific enthalpy will equal the mixed-cup specific enthalpy, thus . The mass of one control volume is given by


5. References


[1] S.M.Ghiaasiaan: "Two-Phase Flow, Boiling and Condensation in Conventional and Miniature Systems", 2008

6. Version History


Backlinks: ClaRa:Components:HeatExchangers:FlatTubeFinnedHEXvle2gas L4 ClaRa:Components:HeatExchangers:PlateHEXvle2vle L4