Paper presented at the 6th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, South Africa, 30 June - 2 July, 2008.
Stratified oil/water two-phase flow in a horizontal tube is
numerically simulated using commercial CFD package
FLUENT 6.3. The simulations are based on Volume of Fluid
(VOF) model. It solves a single momentum equation shared by
the fluids, and the volume fraction of each of the fluid in each
computational cell is tracked throughout the domain. The RNG
k- model together with standard wall treatment as the nearwall
modelling method is used for turbulence modelling. The
effects of surface tension along the interface between two fluids
are calculated using Continuum Surface Force (CSF) model.
The simulation is performed in a time-dependent way so that
the numerical stabilization could be achieved. The final
solution which corresponds to steady-state flow is analyzed.
Results of pressure drop, slip ratio, interface height and the
axial velocity profiles are verified by experimental data. The
predictions of pressure drop, slip ratio and interface height are
observed to compare favourably with experimental
measurements, and estimated flow quantities such as axial
velocity profiles are also satisfactory.
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