Next Article in Journal
Acoustic Streaming and Its Applications
Previous Article in Journal
Rheological Behavior of Fresh Cement Pastes
Article Menu

Export Article

Open AccessArticle
Fluids 2018, 3(4), 107; https://doi.org/10.3390/fluids3040107

Experimental Measurement of Steady and Transient Liquid Coiling with High-Speed Video and Digital Image Processing

Department of Mechanical Engineering, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 19 October 2018 / Revised: 6 December 2018 / Accepted: 12 December 2018 / Published: 15 December 2018
Full-Text   |   PDF [5764 KB, uploaded 15 December 2018]   |  

Abstract

Liquid coiling occurs as a viscous fluid flows into a stagnant reservoir causing a localized accumulation of settling material, which coils into a stack as it accumulates. These coiling flows are broadly characterized into three primary coiling regimes of viscous, gravitational, or inertial coiling, based on the velocity of the falling fluid, the height of the fall, the radius of the fluid rope, the stack height, and the fluid properties including viscosity. A computer-controlled flow delivery apparatus was developed here to produce precisely controlled flow conditions to study steady and transitional coiling regimes with independently varied parameters. Data were recorded using high-speed digital video cameras and a purpose-built digital image processing routine to extract rope and stack dimensions as well as time-resolved coiling frequency. The precision of the setup and data analysis methods allowed a detailed study of the transition between gravitational and inertial flow regimes. The results show a smooth transition between the regimes, with no evidence of the inertial-gravitational regime. Unsteady coiling was able to be momentarily produced by applying a perturbation to the system, but the unstable regime quickly decayed to either the base inertial or gravitational regime. View Full-Text
Keywords: liquid coiling; high speed imaging; image processing; non-dimensional analysis liquid coiling; high speed imaging; image processing; non-dimensional analysis
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Mier, F.A.; Bhakta, R.; Castano, N.; Garcia, J.; Hargather, M.J. Experimental Measurement of Steady and Transient Liquid Coiling with High-Speed Video and Digital Image Processing. Fluids 2018, 3, 107.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Fluids EISSN 2311-5521 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top