Backflow events under the effect of secondary flow of Prandtl's first kind
Rey Chin, Ricardo Vinuesa, Ramis Örlü, José I. Cardesa, Azad Noorani, M. S. Chong, Philipp Schlatter
Abstract
The occurrence of backflow events, defined as negative wall-shear stress, is rare in turbulent flows. It is found that these backflow events are further suppressed in a toroidal flow when compared to a straight pipe flow at a nominally similar Reynolds number. The reduction of backflow is due to the secondary flow of Prandtl's first kind occurring in the toroidal flow.
Topics & Concepts
BackflowPrandtl numberMechanicsFlow (mathematics)TurbulenceReynolds numberToroidReynolds stressShear stressPhysicsMaterials scienceHeat transferEngineeringMechanical engineeringInletPlasmaQuantum mechanicsFluid Dynamics and Turbulent FlowsHeat Transfer MechanismsWind and Air Flow Studies