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Fluids, Volume 6, Issue 3

2021 March - 41 articles

Cover Story: Sensing of critical events or flow signatures in nature often presents itself as a coupled interaction between a fluid and arrays of slender flexible beams, such a wind hairs or whiskers. A model of a sea lion is built with artificial whiskers on the head in the form of optical fibres. Motion tracking is used to analyse the correlation of the bending deformations of the pairs of fibres. Coherent vortical structures can be detected from cross-correlation of their signals, even in highly turbulent flows. Such vortices carry important information within the environment, e.g., underlying convection velocity. More importantly, in nature, these vortices are characteristic elementary signals left by prey and predators. The present work can help to further develop flow, or critical event, sensory systems that can overcome high noise levels due to the proposed correlation principle. View this paper.
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Articles (41)

  • Article
  • Open Access
6 Citations
2,847 Views
11 Pages

Aspects Concerning the Fabrication of Magnetorheological Fluids Containing High Magnetization FeCo Nanoparticles

  • Jon Gutiérrez,
  • Virginia Vadillo,
  • Ainara Gómez,
  • Joanes Berasategi,
  • Maite Insausti,
  • Izaskun Gil de Muro and
  • M. Mounir Bou-Ali

23 March 2021

Recently, our collaborative work in the fabrication of a magnetorheological fluid (MRF) containing high magnetization FeCo nanoparticles (NPs, fabricated in our laboratories using the chemical reduction technique; MS = 212 Am2/kg) as magnetic fillers...

  • Article
  • Open Access
4 Citations
3,388 Views
29 Pages

22 March 2021

Viscoelastic fluids are non-Newtonian fluids that exhibit both “viscous” and “elastic” characteristics in virtue of the mechanisms used to store energy and produce entropy. Usually, the energy storage properties of such fluids are modeled using the s...

  • Article
  • Open Access
4 Citations
2,881 Views
17 Pages

Frequency and Amplitude Modulations of a Moving Structure in Unsteady Non-Homogeneous Density Fluid Flow

  • Tolotra Emerry Rajaomazava,
  • Mustapha Benaouicha,
  • Jacques-André Astolfi and
  • Abdel-Ouahab Boudraa

21 March 2021

A fluid-structure interaction’s effects on the dynamics of a hydrofoil immersed in a fluid flow of non-homogeneous density is presented and analyzed. A linearized model is applied to solve the fluid-structure coupled problem. Fluid density variations...

  • Article
  • Open Access
17 Citations
11,472 Views
20 Pages

21 March 2021

Fluidic oscillators have proven their capabilities and advantages in terms of the generation of oscillating jets without moving parts for many years, mainly in experimental studies. In this paper, the design, development, and integration of fluidic a...

  • Article
  • Open Access
6 Citations
3,706 Views
16 Pages

20 March 2021

Fluidic actuators are designed to control the oscillatory helical mode, called a precessing vortex core (PVC), which is often observed in gas turbine combustors. The PVC induces large-scale hydrodynamic coherent structures, which can considerably aff...

  • Article
  • Open Access
19 Citations
6,430 Views
17 Pages

Anguilliform Locomotion across a Natural Range of Swimming Speeds

  • Nils B. Tack,
  • Kevin T. Du Clos and
  • Brad J. Gemmell

20 March 2021

Eel-like fish can exhibit efficient swimming with comparatively low metabolic cost by utilizing sub-ambient pressure areas in the trough of body waves to generate thrust, effectively pulling themselves through the surrounding water. While this is und...

  • Case Report
  • Open Access
16 Citations
3,168 Views
9 Pages

Sediment Deposition within Rainwater: Case Study Comparison of Four Different Sites in Ikorodu, Nigeria

  • Chukwuemeka K. John,
  • Jaan H. Pu,
  • Manish Pandey and
  • Prashanth R. Hanmaiahgari

19 March 2021

Building roofs represents a critical pathway for sediment mixing with rainwater. This study aims to explore the correlation between roof-top deposited sediment matter in the different areas of the Ikorodu Local Government Area in Lagos, Nigeria. The...

  • Article
  • Open Access
2 Citations
2,694 Views
10 Pages

19 March 2021

The nonlinear dynamics of the interface between two immiscible dielectric liquids at the regime of suppressed Kelvin-Helmholtz instability by external horizontal electric field is studied theoretically. The initial equations of the fluids motion are...

  • Article
  • Open Access
12 Citations
3,647 Views
22 Pages

19 March 2021

Heat and mass transfer due to a magneto micropolar fluid flow along a semi-infinite vertical plate bounded by a porous medium are investigated in presence of induced magnetic field. In case of cooling flow, heat and mass fluxes from the plate are sub...

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Fluids - ISSN 2311-5521