Microbubble generator excited by fluidic oscillator's third harmonic frequency

0431194 - ÚT 2015 RIV GB eng J - Journal Article
Tesař, Václav
Microbubble generator excited by fluidic oscillator's third harmonic frequency.
Chemical Engineering Research and Design. Roč. 92, č. 9 (2014), s. 1603-1615. ISSN 0263-8762. E-ISSN 1744-3563
R&D Projects: GA ČR GA13-23046S
Institutional support: RVO:61388998
Keywords : fluidic oscillator * microbubble generation * fluidic feedback loop
Subject RIV: BK - Fluid Dynamics
Impact factor: 2.348, year: 2014
http://dx.doi.org/10.1016/j.cherd.2013.12.004

Efficient generation of sub-millimetre microbubbles was recently made possible by pulsating the flow of gas supplied into a parallel-exits aerator, using a fluidic oscillator for the purpose. Without moving parts, it can generate oscillation at high frequency, an important factor due to bubble natural frequency rapidly increasing with the desirable decrease of their size. This paper discusses development of an unusual oscillator – a part of an integral oscillator/aerator unit – capable of generating a particularly high driving frequency, in the kilohertz range, in a layout that promotes a strong third harmonic frequency of the basic oscillation.
Permanent Link: http://hdl.handle.net/11104/0235963