Pregled bibliografske jedinice broj: 236308
A curvature effect on the critical Richardson number
A curvature effect on the critical Richardson number // Hrvatski meteorološki časopis, 29 (1994), 43-46 (podatak o recenziji nije dostupan, prethodno priopćenje, znanstveni)
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Naslov
A curvature effect on the critical Richardson number
Autori
Grisogono, Branko
Izvornik
Hrvatski meteorološki časopis (1330-0083) 29
(1994);
43-46
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, prethodno priopćenje, znanstveni
Ključne riječi
Richardson number; critical level; Taylor-Goldstein equation; parameterization
Sažetak
Transition from laminar to turbulent flow associated with a critical level in the stratified shear flow are related to the critical (gradient) Richardson number Ric=1/4. Based on the linear theory and a modified Taylor-Goldstein equation, here it is plausibly shown that Ric may slightly vary from this value if the mean wind speed profile contains a small curvature (parameterized here) around the critical level. The modified Ric that depends on the dimensionless curvature alpha = (U" * zheta / u') is Ric (alpha) = (1 + alpha/2)[alpha + (1 + alpha/2) / 4]
Izvorni jezik
Engleski
