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Fluids, Volume 9, Issue 5

May 2024 - 20 articles

Cover Story: This study explores how modern lightbars affect vehicle fuel efficiency, focusing on their impact on fuel consumption and strategies for improving aerodynamic performance. Simulations showed an 8–11% increase in drag for square-back vehicles, with greater penalties outlined for vehicles with rear-slanting roofs. Given the moderate drag increase, the impact on the driving range, especially for electric vehicles, remains minimal, supporting the continued use of external lightbars. Noise analysis identified that the lightbar’s wake and rear surfaces were responsible for the largest production of noise. Appendable clip-on devices for the lightbar, particularly rear clip-ons, demonstrated appreciable drag reductions of up to 2.5%. A final optimised lightbar design produced a three-fold drag improvement in the current generation of lightbars. View this paper
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Articles (20)

  • Article
  • Open Access
1,586 Views
23 Pages

16 May 2024

We examine the optimal mass transport problem in Rn between densities with transitioning compact support by considering the geometry of a continuous interpolating support boundary Γ in space-time within which the mass density evolves according...

  • Article
  • Open Access
2 Citations
1,447 Views
22 Pages

16 May 2024

Liquid films are often found in engineering applications with thicknesses ranging from micrometer scales to large scales with a wide range of applications. To optimize such systems, researchers have dedicated themselves to the development of new tech...

  • Article
  • Open Access
2 Citations
1,427 Views
28 Pages

16 May 2024

The theoretical basis for the Eddy Damped Markovian Anisotropic Closure (EDMAC) is formulated for two-dimensional anisotropic turbulence interacting with Rossby waves in the presence of advection by a large-scale mean flow. The EDMAC is as computatio...

  • Article
  • Open Access
6 Citations
4,573 Views
13 Pages

Characterization Data for the Establishment of Scale-Up and Process Transfer Strategies between Stainless Steel and Single-Use Bioreactors

  • Vincent Bernemann,
  • Jürgen Fitschen,
  • Marco Leupold,
  • Karl-Heinz Scheibenbogen,
  • Marc Maly,
  • Marko Hoffmann,
  • Thomas Wucherpfennig and
  • Michael Schlüter

16 May 2024

The reliable transfer of bioprocesses from single-use bioreactors (SUBs) of different scales to conventional stainless steel stirred-tank bioreactors is of steadily growing interest. In this publication, a scale-up study for SUBs with volumes of 200...

  • Article
  • Open Access
1,803 Views
17 Pages

Impact of Convection Regime on Temperature Distribution in Food Distribution Storage Box

  • Fabien Beaumont,
  • Sébastien Murer,
  • Fabien Bogard and
  • Guillaume Polidori

14 May 2024

This study aims to optimize the thermodynamic performance of a cold storage distribution box through the integration of a ventilation system. To achieve this goal, a prototype constructed from expanded polystyrene is developed, incorporating an activ...

  • Brief Report
  • Open Access
1,100 Views
11 Pages

11 May 2024

Curved free shear layers emerge in many engineering problems involving complex flow geometries, such as the flow over a backward-facing step, flows with wall injection in a boundary layer, the flow inside side-dump combustors, or wakes generated by v...

  • Article
  • Open Access
3 Citations
3,136 Views
23 Pages

Reducing Aerodynamic Drag on Roof-Mounted Lightbars for Emergency Vehicles

  • Michael Gerard Connolly,
  • Malachy J. O’Rourke and
  • Alojz Ivankovic

11 May 2024

This paper investigates the impact of contemporary lightbars on vehicle fuel efficiency with a focus on quantifying their effects on fuel consumption and exploring strategies to improve drag performance through modifications. Simulations showed an 8&...

  • Article
  • Open Access
4 Citations
2,343 Views
24 Pages

10 May 2024

This study aims to experimentally investigate the effects of parallel blade–vortex interaction (BVI) on the aerodynamic performances of an airfoil, in particular as a possible cause of blade stall, since similar effects have been observed in li...

  • Article
  • Open Access
3 Citations
1,934 Views
16 Pages

Experimental Investigation of the Effects of Grooves in Fe2O4/Water Nanofluid Pool Boiling

  • Marwa khaleel Rashid,
  • Bashar Mahmood Ali,
  • Mohammed Zorah and
  • Tariq J. Al-Musawi

8 May 2024

In this study, we systematically explored how changing groove surfaces of iron oxide/water nanofluid could affect the pool boiling heat transfer. We aimed to investigate the effect of three types of grooves, namely rectangular, circular, and triangul...

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Fluids - ISSN 2311-5521