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PIV Analysis of Wake Structure of Real Elephant Seal Whiskers

Bunjevac, Joseph Antun
http://orcid.org/0000-0002-6525-4541
http://rave.ohiolink.edu/etdc/view?acc_num=csu1501102202600591

Abstract Details

2017, Master of Science in Mechanical Engineering, Cleveland State University, Washkewicz College of Engineering.
Seals are able to accurately detect minute disturbances in the ambient flow environment using their whiskers, which is attributed to the exceptional capability of their whiskers to suppress vortex-induced vibrations in the wake. To explore potential applications for designing smart flow devices, such as high-sensitivity underwater flow sensors and drag reduction components, researchers have studied how the role of some key parameters of whisker-like morphology affect the wake structure. Due to the naturally presented variation in size and curvature along the length of whiskers, it is not well understood how a real whisker changes the surrounding flow and the vortex shedding behavior. This study aims to detail the flow statistics around a real Elephant Seal whisker at low Reynolds numbers (i.e. one hundred) using particle image velocimetry in a water channel. Wake flow structures are inspected and compared between two Elephant Seal whiskers (undulating) and a California Sea Lion whisker (smooth), along with idealized whisker-like models. Undulating whiskers significantly change the mean flow properties and suppress turbulence intensities in the wake region as compared to the smooth whisker at the tested Re. The undulating whiskers are able to create a low turbulence intensity area directly behind the whiskers trailing, vproviding these whiskers with their Vortex Induced Vibration reduction properties.
Wei Zhang, Ph.D. (Advisor)
Mounir Ibrahim, Ph.D. (Committee Member)
Thijs Heus, Ph.D. (Committee Member)
60 p.
Biomechanics; Fluid Dynamics
Undulating whiskers, vortex dynamics, seal whiskers, elephant seal, harbor seal, PIV, water channel, flow, vortex induced vibration, VIV, turbulence, vortex supression, undulations

Recommended Citations

Citations

  • Bunjevac, J. A. (2017). PIV Analysis of Wake Structure of Real Elephant Seal Whiskers [Master's thesis, Cleveland State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=csu1501102202600591

    APA Style (7th edition)

  • Bunjevac, Joseph. PIV Analysis of Wake Structure of Real Elephant Seal Whiskers. 2017. Cleveland State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=csu1501102202600591.

    MLA Style (8th edition)

  • Bunjevac, Joseph. "PIV Analysis of Wake Structure of Real Elephant Seal Whiskers." Master's thesis, Cleveland State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=csu1501102202600591

    Chicago Manual of Style (17th edition)

csu1501102202600591
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© 2017, some rights reserved.Creative Commons License PIV Analysis of Wake Structure of Real Elephant Seal Whiskers by Joseph Antun Bunjevac is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by Cleveland State University and OhioLINK.