ITEMS

modern scholarly publishers in the finest tradition

References

	Search

ICHMT DIGITAL LIBRARY ONLINE

ISSN 961-91393-0-5

Individual price:

$246.00 (Must be sent to your home address)

You can order single issue or individual article. To purchase a single issue or an individual article as well as to view tables of contents and abstracts click on issue number.

Institutional price:

$518.00

Volumes per year:

various

For Online Access

Year 2006

Volume 1 - Turbulence, Heat and Mass Transfer 5
Proceeding of The International Symposium on Turbulence, Heat and Mass Transfer - Dubrovnik, Croatia, September 25-29, 2006

806 pages

Volume price - $246.00

Mechanism of a tilting in the longitudinal vortical structure of a homogeneous shear flow

O. Iida
Department of Mechanical Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan

N. Komeno
Department of Mechanical Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan

Y. Tsukamoto
Department of Mechanical Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan

Yasutaka Nagano
Department of Mechanical Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan

ABSTRACT

Direct numerical simulations (DNSs) of a homogeneous shear flow are performed to study the detailed mechanism of the tilting of a longitudinal vortical structure typically observed in a turbulent shear flow. The longitudinal vortical structure, having the intense streamwise vorticity, is elongated in the streamwise direction, though it is also tilted in the spanwise direction. The sense of this tilting is determined by the sense of the streamwise vorticity. Although it is known that the tilting is due to the combined effects of the non-linear terms and mean spanwise vorticity, its detailed mechanism is still unknown. By systematically changing the Reynolds number of the flow as well as imposing a spanwise system rotation, we investigated the effects of the non-linear term and spanwise rotation on the tilting.