INVESTIGADORES
STORTI Mario Alberto
artículos
Título:
Computing Ship Wave Resistance from Wave Amplitude with a Non-Local Absorbing Boundary Condition"
Autor/es:
STORTI MARIO; D'ELÍA, JORGE; IDELSOHN, SERGIO
Revista:
COMMUNICATIONS IN NUMERICAL METHODS IN ENGINEERING
Editorial:
John Wiley and sons
Referencias:
Lugar: Hoboken, New Jersey; Año: 1998 vol. 14 p. 997 - 1012
ISSN:
1069-8299
Resumen:
A method for computing ship wave resistance from a momentum flux
balance is presented. It is based on computing the momentum flux
carried by the gravity waves that exit the computational domain through
the outlet plane. It can be shown that this method ensures a
non-negative wave-resistance, in contrast with straightforward
integration of the normal pressure forces. However, this calculation
should be performed on a transverse plane located far behind the ship.
Traditional Dawson-like methods add a numerical viscosity that dampens
the wave pattern so that some amount of momentum flux is lost, and
resulting in an error in the momentum balance. The flow field is
computed, then, with a centred scheme with absorbing boundary
conditions.