crta
Hrvatska znanstvena Sekcija img
bibliografija
3 gif
 Naslovna
 O projektu
 FAQ
 Kontakt
4 gif
Pregledavanje radova
Jednostavno pretraživanje
Napredno pretraživanje
Skupni podaci
Upis novih radova
Upute
Ispravci prijavljenih radova
Ostale bibliografije
Slični projekti
 Bibliografske baze podataka

Pregled bibliografske jedinice broj: 363782

Zbornik radova

Autori: Kavčič, Iva
Naslov: An experimental study of the circular internal hydraulic jump
Izvornik: Geophysical Fluid Dynamics Program Notes (Course Lectures and Fellows Project Reports) / Cenedese, Claudia ; Whitehead, John A. ; Pedlosky, Joseph ; Lentz, Steven (ur.). - Woods Hole, SAD : Woods Hole Oceanographic Institution , 2008. 244-263.
Skup: Geophysical Fluid Dynamics Program (2007 Program of Study: Boundary Layers)
Mjesto i datum: Woods Hole, SAD, 18.06.-24.08.2007.
Ključne riječi: Hydraulic jump; Stationary waves; Stratified fluid
Sažetak:
The results of an experimental investigation of the circular internal hydraulic jump in two-layer fluid are presented, with focus on the dependence on the flow rates and density differences between fresh and salty water used. For the lower flow rates the stable circular patterns, consisted of three or four well-formed stationary waves, were observed, while for the higher flow rates their axial symmetry was lost by deformation of entire wave pattern in cusp-like features. This stable, laminar regime lasted 4-5 minutes, after which instabilities started to develop, finally breaking the wave patterns in turbulent motion. The radii of stationary waves were measured, and the depths of the fluid inside and outside the jump were calculated in order to find the critical values of jump radius, fluid depth and Froude number just before the onset of instabilities. While the values of jump radius, fluid depth and Froude number inside the jump (reaching values of up to 12-14) strongly depend on variations in flow rate and density difference, this dependence does not seem to be so strong for the Froude number outside the jump. Their values are below 1, due to dispersion relation for the internal waves in two-layer fluid used to calculate the fluid depth outside the jump. Comparison of results with the analytic Watson’ s (1964) model for the jump in the single-layer flow indicates the existence of similar functional dependence for the two-layer fluid. Finally, the experiments where the sharp density difference was smoothed by diffusion indicate that the stationary, laminar waves cannot occur in a continuously stratified fluid.
Vrsta sudjelovanja: Predavanje
Vrsta prezentacije u zborniku: Cjeloviti rad (više od 1500 riječi)
Vrsta recenzije: Međunarodna recenzija
Projekt / tema: 037-1193086-2771
Izvorni jezik: ENG
Kategorija: Znanstveni
Znanstvena područja:
Matematika,Fizika,Geologija
Puni text rada: 363782.Kavcic_GFD2007report.pdf (tekst priložen 23. Ruj. 2009. u 17:01 sati)
URL Internet adrese: http://www.whoi.edu/page.do?pid=19276
Upisao u CROSBI: ikavcic@geolpmf.hr (ikavcic@geolpmf.hr), 27. Kol. 2008. u 13:10 sati
Napomene:
Bibliografska referenca: WHOI-2008-05



Verzija za printanje   za tiskati


upomoc
foot_4