Naslov
Trapped lee wave interference in presence of surface friction

Autori
Stiperski, Ivana ; Grubišić, Vanda

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
30th International Conference on Alpine Meteorology - Programme & Extended Abstracts. Deutscher Wetterdienst: Annalen der Meteorologie, 44 / Volkert, Hans - Offenbach : Deutscher Wetterdienst, 2009, 110-111

ISBN
978-3-88148-440-4

Skup
30th International Conference on Alpine Meteorology

Mjesto i datum
Rastatt, Njemačka, 11.05.2009. - 15.05.2009

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
boundary layer separation; critical mountain height; nonlinearity; rotors

Sažetak
Lee-wave interference over twin peaks in the presence of a frictional boundary layer is investigated by means of idealized high-resolution two-dimensional simulations with the NRL COAMPS model. The interference is examined under linear to highly nonlinear flow regimes. The results show that the pattern of positive and negative interference, evident in the wave amplitude and rotor strength, is consistent with the predictions of linear interference theory. Interference is found to most significantly affect the flow in the lee of the downstream ridge, preventing boundary-layer separation there under conditions of destructive interference and amplifying rotor strength under constructive interference in different flow regimes. Only under strongly nonlinear conditions is the rotor strength amplified by constructive interference beyond that obtained in the lee of a single mountain.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA