Naslov
URANS and DES simulation of flow around bridge sections

Autori
Mannini, Claudio ; Šoda, Ante ; Voss, Ralph ; Schewe, Guenter

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

Izvornik
Proceedings of the 9th Italian National Conference on Wind Engineering IN-VENTO / D'Asdia P. ; Sepe V. ; Febo S. - Pescara, 2006, 449-458

Skup
9th Italian Conference on Wind Engineering (IN-VENTO)

Mjesto i datum
Pescara, Italija, 18.07.2006. - 21.07.2006

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
bridges; bluff bodies; computational aerodynamics; turbulence modelling

Sažetak
This paper deals with the numerical simulation of the flow around three different two-dimensional bluff bodies: a 1:1 square cylinder, a 1:5 rectangular cylinder and a realistic bridge section. The Unsteady Reynolds-Averaged Navier-Stokes (URANS) and the Detached-Eddy Simulation (DES) techniques are employed. In the process the influence of various modelling parameters, such as turbulence modelling, and flow parameters, such as Reynolds number and incidence angle, is investigated. Validation of computed results with the experimental data shows that the URANS-based computational approach is well capable of predicting the basic unsteady flow phenomena in the considered cases. The preliminary DES results enable a better insight in the flow physics while, at the same time, confirming the much less expensive URANS predictions. In addition, it is shown that the sharpness of section corners plays a key role in the development of the flow around typical bridge deck profiles, strongly affecting the Strouhal number and global aerodynamic coefficients.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA