The laminar flow about a circular cylinder beneath a Stokes waves train is numerically investigated. An efficient grid free algorithm is developed by coupling an accurate boundary integral equation method for computing the velocity field with a viscous vortex method for solving the Navier Stokes equations near the body. The problem of generating the incident wave system is effectively circumvented by means of a perturbation formulation which assumes the Stokes wave solution as the base flow. For beta similar or equal to 500 and K-c = O(1) the systematic comparison with the available experimental values for the Fourier components of the loading is presented. An overall good agreement is observed, even for the added inertia coefficient which is known to be largely affected by viscous effects.
Viscous effects in wave-body interaction / Landrini, M.; Ranucci, M.; Casciola, Carlo Massimo; Graziani, Giorgio. - STAMPA. - 3:(1997), pp. 327-335. (Intervento presentato al convegno SEVENTH (1997) INTERNATIONAL OFFSHORE AND POLAR ENGINEERING CONFERENCE tenutosi a HONOLULU, HI nel MAY 25-30, 1997).
Viscous effects in wave-body interaction
CASCIOLA, Carlo Massimo;GRAZIANI, Giorgio
1997
Abstract
The laminar flow about a circular cylinder beneath a Stokes waves train is numerically investigated. An efficient grid free algorithm is developed by coupling an accurate boundary integral equation method for computing the velocity field with a viscous vortex method for solving the Navier Stokes equations near the body. The problem of generating the incident wave system is effectively circumvented by means of a perturbation formulation which assumes the Stokes wave solution as the base flow. For beta similar or equal to 500 and K-c = O(1) the systematic comparison with the available experimental values for the Fourier components of the loading is presented. An overall good agreement is observed, even for the added inertia coefficient which is known to be largely affected by viscous effects.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
