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Fluids
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Bluff Body Aerodynamics
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Bluff Body Aerodynamics

A special issue of Fluids (ISSN 2311-5521).

Deadline for manuscript submissions: closed (25 October 2022) | Viewed by 4184

Special Issue Editors

Dr. Amir Teimourian

E-Mail Website
Guest Editor
Aeronautical Engineering Department, University of Kyrenia, Kyrenia, Northern Cyprus, Mersin 10, Turkey
Interests: experimental fluid mechanics; turbulence; vehicle aerodynamics; flow control; bluff body aerodynamics
Dr. Andrea Da Ronch

E-Mail Website
Guest Editor
Engineering and Physical Sciences, University of Southampton, Southampton SO17 1BJ, UK
Interests: aerodynamics; fluid mechanics; structural dynamics; numerical analysis; cfd simulation; finite element analysis; computational fluid dynamics; numerical simulation; modeling and simulation; engineering thermodynamics
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Young June Moon

E-Mail Website
Guest Editor
Computational Fluid Dynamics and Acoustics Laboratory, School of Mechanical Engineering, Korea University, Seoul, Korea
Interests: aerodynamics and aeroacoustics

Special Issue Information

Dear Colleagues,

The aerodynamics of bluff bodies have fascinated researchers for decades due to their vast number of applications, which range from civil engineering to wind engineering, and from bridges to offshore structures, which profoundly relies on our underacting of Bluff body aerodynamics.

This Special Issue of Fluids is dedicated to recent developments in bluff body aerodynamics in terms of fundamentals and applications to engineering problems. The aim is to provide researchers with the opportunity to present original research papers as well as review articles to provide an overview of future areas of research in this field. The topics may include but are not limited to numerical and experimental studies on the vortex shedding phenomenon; bridge, cable and building aerodynamics; vehicle and train aerodynamics; and wake flow control. Novel ideas and emerging research topics within the scope of bluff body aerodynamics such as flow induced vibration energy harvesting are highly welcomed.

Dr. Amir Teimourian
Prof. Dr. Andrea Da Ronch
Prof. Dr. Young June Moon
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Fluids is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • bluff body aerodynamics
  • vortex shedding
  • separated flows
  • wake flow and flow control

Published Papers (2 papers)

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Research

14 pages, 2462 KiB  
Article
Numerical Simulation of Acoustic Resonance in a Duct Containing a Flat Plate
by Benedict Geihe, Jens Wellner and Graham Ashcroft
Fluids 2022, 7(8), 253; https://doi.org/10.3390/fluids7080253 - 26 Jul 2022
Viewed by 1283
Abstract
This work is about numerical simulations of vortex induced acoustic resonance in a duct, experimentally investigated by Welsh et al. Vortex shedding of low-speed flow over a flat plate excites an acoustic duct mode, leading to a lock-in of shedding and acoustic resonance [...] Read more.
This work is about numerical simulations of vortex induced acoustic resonance in a duct, experimentally investigated by Welsh et al. Vortex shedding of low-speed flow over a flat plate excites an acoustic duct mode, leading to a lock-in of shedding and acoustic resonance frequency over a wide range of flow velocities. This study shows that a state-of-the-art compressible Navier–Stokes flow solver is able to capture the lock-in phenomenon. The focus is on the numerical parameters required to precisely recover the experimental results in terms of lock-in range and acoustic pressure levels. Complete and reliable physical data are thereby obtained, which can aid in developing a systematic understanding of the complex flow interactions. Furthermore, hysteresis behavior is discovered and numerically explored. Full article
(This article belongs to the Special Issue Bluff Body Aerodynamics)
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15 pages, 4917 KiB  
Article
Spanwise-Discontinuous Grooves for Separation Delay and Drag Reduction of Bodies with Vortex Shedding
by Elena Pasqualetto, Gianmarco Lunghi, Alessandro Mariotti and Maria Vittoria Salvetti
Fluids 2022, 7(4), 121; https://doi.org/10.3390/fluids7040121 - 23 Mar 2022
Cited by 5 | Viewed by 1853
Abstract
Suitably shaped grooves, placed transverse to the flow, can delay flow separation over curved surfaces. When grooves are fully extruded in the spanwise direction, they may reduce the drag of boat-tailed bodies with vortex shedding, but with the drawback of increasing the spanwise [...] Read more.
Suitably shaped grooves, placed transverse to the flow, can delay flow separation over curved surfaces. When grooves are fully extruded in the spanwise direction, they may reduce the drag of boat-tailed bodies with vortex shedding, but with the drawback of increasing the spanwise correlation of the vortex shedding. We investigate herein the effect of spanwise-discontinuous grooves through Large Eddy Simulations. A systematic analysis is carried out on the effect of the number, N, of grooves that are present for N equally long portions of the total spanwise length of the boat-tail. Discontinuous grooves further reduce the drag compared with the full-spanwise-extruded groove. Increasing N produces an improvement of the flow-control-device performance, whose maximum value is reached for N=3, corresponding to a spanwise extension of the groove roughly equal to the body crossflow dimension. Above this value, no further improvements are found. The maximum drag reduction is equal to 25.7% of the drag of the boat-tail without grooves and to 17.7% of the one of the boat-tail with the full-spanwise-extruded groove. The lowest drag value occurs for the least correlated vortex-shedding in the spanwise direction. The reduction in the correlation is mainly related to a flow separation line that is less regular in the spanwise direction. Full article
(This article belongs to the Special Issue Bluff Body Aerodynamics)
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