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Fluids, Volume 6, Issue 4

April 2021 - 35 articles

Cover Story: The stability of surface water waves impacts the design of harbor structures, experimental facilities, and tells us about the evolution of tsunamis and rogue waves. Recently, instabilities with respect to high-frequency disturbances of periodic surface water waves have been studied computationally in great detail. Working towards understanding these instabilities from an analytical perspective, we investigate these instabilities in the context of a simplified surface water wave model. This model, designed by Hur and Pandey, mimics many aspects of the full surface water wave problem, making it an ideal playground to develop the perturbation methods that will be used to investigate the full problem. Our methods show excellent agreement with the computational results. View this paper.
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Articles (35)

  • Article
  • Open Access
33 Citations
11,910 Views
14 Pages

14 April 2021

Accurate characterization of the rheological behavior of non-Newtonian fluids is critical in a wide range of industries as it governs process efficiency, safety, and end-product quality. When the rheological behavior of fluid may vary substantially o...

  • Essay
  • Open Access
8 Citations
6,512 Views
18 Pages

Teaching and Learning Floating and Sinking: Didactic Transformation in a Density-Based Approach

  • Anastasios Zoupidis,
  • Anna Spyrtou,
  • Dimitrios Pnevmatikos and
  • Petros Kariotoglou

14 April 2021

This essay synthesizes more than a decade of research, most of which has been published, on the teaching and learning of floating and sinking (FS) phenomena. The research is comprised of the iterative design, development, implementation and evaluatio...

  • Article
  • Open Access
2 Citations
2,679 Views
17 Pages

Oscillating Magnetohydrodynamic Stokes Flow between Porous Plates with Spatiotemporally Periodic Reabsorption

  • Anastasios Raptis,
  • Christos Manopoulos,
  • Michalis Xenos and
  • Sokrates Tsangaris

14 April 2021

The study addresses the oscillating magnetohydrodynamic (MHD) Stokes flow between two parallel plates with periodic reabsorption both spatially and temporally. Two cases are distinguished by applying either (1) transverse or (2) parallel external mag...

  • Article
  • Open Access
5 Citations
3,405 Views
12 Pages

Jet Dynamics Associated with Drop Impact on Micropillared Substrate

  • Brooklyn Asai,
  • Anayet Ullah Siddique and
  • Hua Tan

12 April 2021

The jetting phenomenon associated with droplet impact upon a hydrophilic micropillared substrate was analyzed in detail using a high-speed camera. Viscosities of the fluids were varied using differing concentrations of glycerol in deionized water. Th...

  • Review
  • Open Access
17 Citations
6,346 Views
13 Pages

9 April 2021

Ocean waves deliver an immense amount of energy to coasts around the planet, powering high-velocity flows that interact with nearshore marine plants and animals. Although some of these interactions are beneficial, it is often advantageous for subtida...

  • Article
  • Open Access
7 Citations
5,343 Views
15 Pages

9 April 2021

This work presents an experimental study of the possibility of intensifying in microfluidic heat exchangers (MFHE) by creating a two-phase segmented flow (gas–liquid). Measurements of convective heat transfer were carried out using an MFHE, consistin...

  • Article
  • Open Access
8 Citations
3,937 Views
13 Pages

9 April 2021

Initially motivated by the analysis of the flow dynamics of the synovial fluid, taken as non-Newtonian, this paper also reports on a numerical challenge which occurred unexpectedly while solving the momentum equation of the model. The configuration c...

  • Article
  • Open Access
5 Citations
5,588 Views
16 Pages

9 April 2021

This article is a review of ongoing research on analytical, numerical, and mixed methods for the solution of the third-order nonlinear Falkner–Skan boundary-value problem, which models the non-dimensional velocity distribution in the laminar boundary...

  • Article
  • Open Access
8 Citations
3,604 Views
26 Pages

Magnetohydrodynamic Flow of a Bingham Fluid in a Vertical Channel: Mixed Convection

  • Alessandra Borrelli,
  • Giulia Giantesio and
  • Maria Cristina Patria

9 April 2021

In this paper, we describe our study of the mixed convection of a Boussinesquian Bingham fluid in a vertical channel in the absence and presence of an external uniform magnetic field normal to the walls. The velocity, the induced magnetic field, and...

  • Review
  • Open Access
21 Citations
7,070 Views
48 Pages

8 April 2021

Particle tracking is a competitive technique widely used in two-phase flows and best suited to simulate the dispersion of heavy particles in the atmosphere. Most Lagrangian models in the statistical approach to turbulence are based either on the eddy...

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Fluids - ISSN 2311-5521