In the present contribution, the boundary layer generated close to a rough wall by an oscillatory, uniform pressure gradient is studied. The flow simulates the boundary layer generated at the sea bottom by a monochromatic propagating wave. The problem is tackled by numerical means and detailed information on flow dynamics is obtained. In particular, the evolution of vorticity is considered and the coherent vortex structures which are formed within the boundary layer are identified. The force exerted by the fluid on the bed and on the roughness elements is computed along with its pressure and viscous components.
Direct numerical simulation of an oscillatory boundary layer close to a rough wall / Fornarelli, F.; Vittori, G.. - STAMPA. - (2006), pp. 183-190. (Intervento presentato al convegno 4th IAHR Symposium on River, Coastal and Estuarine Morphodynamics, RCEM 2005 tenutosi a Urbana, IL nel October 4-7, 2005).
Direct numerical simulation of an oscillatory boundary layer close to a rough wall
Fornarelli, F.
;
2006-01-01
Abstract
In the present contribution, the boundary layer generated close to a rough wall by an oscillatory, uniform pressure gradient is studied. The flow simulates the boundary layer generated at the sea bottom by a monochromatic propagating wave. The problem is tackled by numerical means and detailed information on flow dynamics is obtained. In particular, the evolution of vorticity is considered and the coherent vortex structures which are formed within the boundary layer are identified. The force exerted by the fluid on the bed and on the roughness elements is computed along with its pressure and viscous components.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
