Nearest Wall Flows – the Genuine Turbulence
Journal Title: INCAS BULLETIN - Year 2017, Vol 9, Issue 3
Abstract
Traditionally, the wall-bounded flows are boundary-layer like flows where the velocity gradients normal to the wall u/y are very large and the velocity monotonously increases from zero to about the velocity free flow, Ue = 0.99 U. However, the instabilities of flow, resulting from the reaction of the solid boundary against onset of flow, originate in the nearest-wall region where the mean velocity varies around of the velocity Ub = 1m/s constituting the wavy microflow field dominated by the boundary vorticity-viscosity mutual changes. The paper is aiming at presenting the main features of the microflow field and a new vision of the turbulence phenomenon illustrated trough canonical boundary-layer flows.
Authors and Affiliations
Horia DUMITRESCU, Vladimir CARDOS
Keywords
Related Articles
- EP ID EP293977
- DOI 10.13111/2066-8201.2017.9.3.4
- Views 55
- Downloads 0
Professor Ion Stroescu and the boundary layer: a precursor of the flow control
CERTIFICATION - The final and critical stage of every civil or military aviation program
As a general rule the final step in every aviation program is the certification of the airplane, an important step in which the airplane, the engins and the equipments are checked by an authority or commission according...
Scaling Method of Existing Aircraft
This paper presents a method of current aircraft scaling down, on the assumption of the same No. Mach, same force and moment coefficients and same mass ratio.
ELIE CARAFOLI – THE MAN, THE TEACHER AND THE SCIENTIST
Selected aspects of the supply chain management in the aerospace industry
The paper in the introductory part underlines some factors concerning the aerospace supply chain management (SCM) issue. Authors inform on selected definitions in this topic, levels of supply chain and its maturity. The...