ISSN Online: 2379-1748
ISBN Flash Drive: 978-1-56700-483-0
ISBN Online: 978-1-56700-482-3
4th Thermal and Fluids Engineering Conference
NUMERICAL STUDY OF SECONDARY FLOW OF A LIQUID-LIQUID TWO PHASE FLUID THROUGH A PIPE BEND WITH SQUARE CROSS-SECTIONAL AREA
The secondary flow in elbows has been studied extensively due to its importance in industrial applications, among other reasons. When a second substance is added to a single-phase flow, the difference in buoyancy force between the phases could have an important role in the formation of secondary flows in elbows. To the best of our knowledge, two phase flow in bends has been significantly studied for liquid-gas flow cases but not for liquid-liquid cases. In this research paper we studied the formation of secondary flow in a pipe bend in order to evaluate the effects of adding a heavier and a lighter insoluble liquid to a water continuous phase. We examined the influence in the flow behavior of different volume fractions, Reynolds numbers, curvature ratios and directions of gravity. A Euler-Euler k-e Reynolds Averaged Navier-Stokes model was used to simulate the motion of the fluid. The square cross-sectional area was selected to simplify the geometry. We found that the buoyancy forces, on specifics cases, reduces drastically the secondary flow, and it appears that this behavior is strongly correlated to the gravitational and centrifugal force ratio.