Lookup NU author(s): Dr Jonathan McDonough,
Dr Richard Law,
Professor Adam Harvey
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
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.
Author(s): McDonough JR, Law R, Kraemer J, Harvey AP
Publication type: Article
Publication status: Published
Journal: Chemical Engineering Research and Design
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
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