A parametrization of the form drag due to airflow over sinusoidal wavy surfaces in the presence of significant flow separation is investigated; it is based on a bluff-body analogy. To this aim, the results of large-eddy simulations carried out for various Reynolds numbers and wave slopes are used, together with the data from experiments and other simulations available in the literature. It is shown that, as a first approximation, the drag coefficient may be considered independent of the wave slope and Reynolds number. The value obtained here for rigid sinusoidal waves is close to that computed for wind-ruffled breaking paddle waves.
|Autori interni:||SALVETTI, MARIA VITTORIA|
|Autori:||SALVETTI M.V.; R. DAMIANI; F. BEUX|
|Titolo:||Drag prediction over steep sinusoidal wavy surfaces|
|Anno del prodotto:||2001|
|Digital Object Identifier (DOI):||10.1063/1.1386945|
|Appare nelle tipologie:||1.1 Articolo in rivista|