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Effect of geometrical parameters on flow-switching frequencies in 3D printed fluidic oscillators containing different liquids

Lookup NU author(s): Dr Jonathan McDonough, Dr Richard Law, Professor Adam Harvey

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).


Abstract

There is limited information available regarding fluidic oscillator design for liquid phase applications. In this paper, the results of a simple parametric study investigating the effects of seven geometrical parameters on the flow-switching frequencies produced in 3D printed single feedback loop bistable oscillators are reported for a variety of glycerol–water mixtures. The most consequential parameter was the splitter distance (distance between the power nozzle and two outlet streams). Reducing the splitter distance from 10 mm to 5 mm produced higher frequencies at the same flow rate. The angle between the outlet channels was also important, with wider angles (18–24°) producing slightly higher frequencies. Feedback loop widths of 4 mm and greater did not produce flow switching. Other factors that inhibited oscillations were reducing the inlet zone length from 32 mm to 22 mm and changing the feedback channel orientation from horizontal to vertical. Increasing the convergence length of the power nozzle (from 5 to 25 mm) and changing the feedback loop length (from 101 to 113 mm) did not greatly affect the frequencies obtained. Overall, frequencies of 2–22 Hz were produced for kinematic viscosities of 1.00–4.37 mm2/s, in the range of Re = 600–12,000.


Publication metadata

Author(s): McDonough JR, Law R, Kraemer J, Harvey AP

Publication type: Article

Publication status: Published

Journal: Chemical Engineering Research and Design

Year: 2017

Volume: 117

Pages: 228-239

Print publication date: 01/01/2017

Online publication date: 27/10/2016

Acceptance date: 19/10/2016

Date deposited: 01/03/2017

ISSN (print): 0263-8762

ISSN (electronic): 1744-3563

Publisher: Elsevier

URL: http://dx.doi.org/10.1016/j.cherd.2016.10.034

DOI: 10.1016/j.cherd.2016.10.034


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