The Bubbly Flow, L-VEL (bf) interface (
), found under the
Multiphase Flow>Bubbly Flow>Bubbly Flow, Turbulent Flow branch (
) when adding a physics interface, is used to model the flow of liquids with dispersed bubbles at high Reynolds numbers.
When this physics interface is added, the following default physics nodes are also added in the Model Builder —
Fluid Properties,
Wall (the default boundary types are
No slip for the liquid and
No gas flux for the gas), and
Initial Values.
The default Turbulence model type is
RANS. A different turbulence model can be selected under
Turbulence model. The default turbulence model is
L-VEL.
L-VEL employs per default an Automatic wall treatment, which switches between a low-Reynolds-number formulation and a wall function formulation depending on how well resolved the flow is close to the wall. The automatic wall treatment gives a robust formulation that makes the most out of the available resolution. Select the
Low Re option in order to enforce resolution all the way down to the wall. This can be more accurate than the automatic wall treatment provided that the mesh is fine enough.