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Pregled bibliografske jedinice broj: 300961

Estimation of turbulence kinetic energy dissipation rate in a Bora event


Večenaj, Željko; Belušić, Danijel; Grisogono, Branko
Estimation of turbulence kinetic energy dissipation rate in a Bora event // 29th International Conference on Alpine Meteorology - Extended Abstracts
Chambery, Francuska: Météo-France, 2007. str. 745-748 (poster, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)


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Naslov
Estimation of turbulence kinetic energy dissipation rate in a Bora event

Autori
Večenaj, Željko ; Belušić, Danijel ; Grisogono, Branko

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

Izvornik
29th International Conference on Alpine Meteorology - Extended Abstracts / - : Météo-France, 2007, 745-748

Skup
29th International Conference on Alpine Meteorology

Mjesto i datum
Chambery, Francuska, 04-08.06.2007

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
bora wind; dissipation rate; inertial dissipation technique; structure function; local isotropy

Sažetak
During a bora event, the turbulence is strongly developed in the lee of the mountain. Wind speed at Senj was measured at 13 m above the ground with a 3D ultrasonic anemometer operating at 4 Hz sampling frequency. This data was used for evaluation of the turbulent kinetic energy (TKE) dissipation rate ε . The estimated value of ε with the inertial dissipation method (IDM) for this event is 1.22 m^2 s^-3 and is taken as the reliable one. An alternative method is based on the third-order streamwise velocity structure function (3SF) which requires a local turbulence isotropy. Using this approach a significantly lower value of ε is obtained, not surpassing 0.70 m^2 s^-3. Inspecting the stronger isotropy condition for the inertial subrange, i.e. the 4:3 ratio of vertical and transverse to streamwise velocity spectra, it is found that the present anemometer's sampling rate only approaches the inertial subrange. This partly explains the lower value of ε obtained using the second method. Thus, the anemometer of a much higher sampling frequency is needed for further studies of the bora-related small-scale turbulence.

Izvorni jezik
Engleski

Znanstvena područja
Geologija



POVEZANOST RADA


Projekti:
0119330
119-1193086-1311 - Bazične ORografske Atmosferske cirkulacije u Hrvatskoj (BORA) (Grisogono, Branko, MZOS ) ( POIROT)
119-1193086-1323 - Kakvoća zraka nad kompleksnom topografijom (Bencetić-Klaić, Zvjezdana, MZOS ) ( POIROT)

Ustanove:
Prirodoslovno-matematički fakultet, Zagreb

Poveznice na cjeloviti tekst rada:

Pristup cjelovitom tekstu rada www.cnrm.meteo.fr

Citiraj ovu publikaciju:

Večenaj, Željko; Belušić, Danijel; Grisogono, Branko
Estimation of turbulence kinetic energy dissipation rate in a Bora event // 29th International Conference on Alpine Meteorology - Extended Abstracts
Chambery, Francuska: Météo-France, 2007. str. 745-748 (poster, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
Večenaj, Ž., Belušić, D. & Grisogono, B. (2007) Estimation of turbulence kinetic energy dissipation rate in a Bora event. U: 29th International Conference on Alpine Meteorology - Extended Abstracts.
@article{article, year = {2007}, pages = {745-748}, keywords = {bora wind, dissipation rate, inertial dissipation technique, structure function, local isotropy}, title = {Estimation of turbulence kinetic energy dissipation rate in a Bora event}, keyword = {bora wind, dissipation rate, inertial dissipation technique, structure function, local isotropy}, publisher = {M\'{e}t\'{e}o-France}, publisherplace = {Chambery, Francuska} }
@article{article, year = {2007}, pages = {745-748}, keywords = {bora wind, dissipation rate, inertial dissipation technique, structure function, local isotropy}, title = {Estimation of turbulence kinetic energy dissipation rate in a Bora event}, keyword = {bora wind, dissipation rate, inertial dissipation technique, structure function, local isotropy}, publisher = {M\'{e}t\'{e}o-France}, publisherplace = {Chambery, Francuska} }




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