Colliding wall-jets on a cylindrical surface

0436034 - ÚT 2016 CZ eng C - Conference Paper (international conference)
Tesař, Václav - Peszyński, K.
Colliding wall-jets on a cylindrical surface.
EFM14 - EXPERIMENTAL FLUID MECHANICS 2014. Les Ulis Cedex: E D P SCIENCES, 2015 - (Dančová, P.; Vít, T.), s. 623-632. EPJ Web of Conferences. ISSN 2100-014X.
[Experimental Fluid Mechanics 2014. Český Krumlov (CZ), 18.11.2014-21.11.2014]
R&D Projects: GA ČR GA13-23046S
Institutional support: RVO:61388998
Keywords : wall jet * jet collision * tristability
Subject RIV: BJ - Thermodynamics

Paper discusses aerodynamics and potential engineering applications of an unusual and in literature practically unknown fluid flow configuration, with two wall-jets attached to a cylindrical surface colliding head-on and generating a single jet directed away. Applications are seen in pneumatic sensors, particularly operating at low Reynolds numbers. Performed experimental investigation combined with numerical flowfield computations revealed several interesting aspects of this flowfield. The most interesting among them is the discovery of symmetry-breaking existence of three different stable flow regimes. This opens a possibility for fluidic tristable amplifiers and control systems operating with ternary logic.
Permanent Link: http://hdl.handle.net/11104/0242221