6533b828fe1ef96bd1287a4d
RESEARCH PRODUCT
LES of the flow around two cylinders in tandem
Guillermo Palau-salvadorThorsten StoesserJochen FroehlichWolfgang Rodisubject
Physicsbusiness.industryMechanical EngineeringReynolds numberMechanicsStructural engineeringVortex sheddingOpen-channel flowCylinder (engine)law.inventionPhysics::Fluid Dynamicssymbols.namesakeFlow (mathematics)TAlawsymbolsPotential flow around a circular cylinderMean flowbusinessLarge eddy simulationdescription
The flow around an arrangement of two-in-tandem cylinders exhibits a remarkably\ud complex behaviour that is of interest for many engineering problems, such as environmental\ud flows or structural design. In the present paper, a Large Eddy Simulation using a staggered\ud Cartesian grid has been performed for the flow around two-in-tandem cylinders of diameter\ud D=20mm and height H=50mm submerged in an open channel with height h=60 mm. The two\ud axes have a streamwise spacing of 2D. The Reynolds number is 1500, based on the cylinder\ud diameter and the free-stream velocity u�. The results obtained show that no vortex shedding\ud occurs in the gap between the two cylinders where the separated shear layers produced by the\ud upstream cylinder reattach on the surface of the downstream one. The flow separates on the top\ud of the first cylinder with the presence of two spiral nodes known as owl-face configuration. On\ud top of the downstream cylinder, the flow is attached. A complex mean flow develops in the gap\ud and also behind the second cylinder. Comparisons with PIV measurements reveal good general\ud agreement, but there are differences concerning some details of the flow in the gap between the\ud cylinders.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-11-01 |