Harmonically forced enclosed swirling flow

Excitable modes in forced symmetry breaking for a cylindrical container with one rotating endwall

The technical relevance of swirling flows has inspired numerous investigations into the field: swirling flow burners, trailing vortices of delta wings, separators etc. are some of the applications where such research has yielded interesting results. At the same time, geophysics-inspired general swirling flow studies provided much input to this field. A subcategory of swirling flows is that wher...

Axisymmetric Vortex Breakdown in an Enclosed Cylinder Flow

The attraction of the confined swirling flow generated inside an enclosed cylinder by the constant rotation of one of its endwalls to a study of vortex breakdown is that the flow is defined by only four variables, these being the height H and radius R of the cylinder, the constant angular speed of rotation of the endwall f~ and the kinematic viscosity t~. These four variables are used to define...

Sidewall boundary layer instabilities in confined swirling flow †

We examine enclosed swirling transitional and turbulent flows in a cylindrical vessel, driven by a single rotating endwall. The cylinder height:radius ratio H/R = 1 was chosen explicitly to preclude the possibility of vortex breakdown on the cylinder axis, thus concentrating attention on the behaviour of the cylindrical sidewall boundary layers. Over a range of Reynolds numbers above Re = ΩR2/ν...

Numerical Simulation of a Confined Swirling Flow in a Model Gas Turbine Combustor

Direct numerical simulation of Open Von Kármán Swirling Flow

Direct numerical simulations are used to investigate the Open Von Kármán Swirling Flow, a new type of unsteady three-dimensional flow that is formed between two counter-rotating coaxial disks with an axial extraction enclosed by a cylinder chamber. Solution verification shows that monotonic convergence is achieved on three systematically refined grids for average pressure at the disk periphery ...