Indirect determination of the turbulent velocity profile origin

0377396 - ÚH 2013 RIV RU eng C - Konferenční příspěvek (zahraniční konf.)
Lukerchenko, Nikolay - Vlasák, Pavel
Indirect determination of the turbulent velocity profile origin.
Matematičeskije metody v technike i technologijach MMTT-25. Vol. Sekcija 34. Volgograd: Volgogradskij gosudarstvennyj techničeskij universitet, 2012 - (Bol'šakov, A.), s. 47-49. ISBN 978-5-7433-2386-9.
[Meždunarodnaja naučnaja konferencija Matematičeskije metody v technike i technologijach /25./. Volgograd (RU), 29.05.2012-31.05.2012]
Grant CEP: GA ČR GA103/09/1718
Výzkumný záměr: CEZ:AV0Z20600510
Klíčová slova: velocity profile * turbulent flow * particle saltation
Kód oboru RIV: BK - Mechanika tekutin

The vertical co-ordinate of the logarithmic turbulent velocity profile origin yo is an important characteristic of turbulent flow in conduit with rough walls. Because length and height of saltation depend strongly on the position of the velocity profile origin, it can be determined by comparison of experimental values of particle saltation and their numerical simulation. The parameter y0 can be expressed as function of saltation length or height, or the boundary Reynolds number, and it was shown that it grows with increasing bed roughness and shear velocity.
Trvalý link: http://hdl.handle.net/11104/0209560