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Selected Papers from ERCOFTAC SIG41 Symposium on "Fluid–Structure Interaction in...
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Selected Papers from ERCOFTAC SIG41 Symposium on "Fluid–Structure Interaction in Complex Systems: From Aero to Astro"

A special issue of Wind (ISSN 2674-032X).

Deadline for manuscript submissions: 30 June 2025 | Viewed by 474

Special Issue Editor

Dr. Giorgos P. Veldes

E-Mail Website1 Website2
Guest Editor
HERON LAB, Department of Physics, University of Thessaly, Volos, Greece
Interests: nonlinear waves; plasma physics; deep space communications; metamaterials

Special Issue Information

Dear Colleagues,

Global challenges, such as climate change-related environmental impacts, can be partially addressed by adapting energy efficiency and design safety to flow conditions. These conditions span from aero- to meteorological and astro-scales, thus covering interfacial phenomena from micro- to meso- and micro-scales. The purpose of the ERCOFTAC SIG41 Symposium on “Fluid–Structure Interaction in Complex Systems: From Aero to Astro” was to discuss the major scientific challenges associated with turbulent flow interfaces with deformable structures subjected to critical solicitations, considering a link to the design as well as drastic changes in stellar systems, from theoretical, experimental and numerical perspectives. Consequently, this Special Issue focuses on the research on these scientific fields which was presented at the ERCOFTAC SIG41 Symposium on “Fluid–Structure Interaction in Complex Systems: From Aero to Astro”. Papers may focus on critical flow dynamics around moving/deformable structures to gust effects on structures, and can involve multiscale phenomena arising in astrophysics with an emphasis on stellar vibrations and associated sound waves, the sun and the aspects of the energetic solar events in the frequencies of microwaves and X-rays. Furthermore, their correlation with space weather aspects can also be present in these papers.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but not limited to) the following:

  • Electroactive morphing;
  • Aerodynamic performance;
  • Gusts and their impacts;
  • Space weather;
  • Solar events;
  • Ionosphere heating;
  • Solar radio observations from spacecraft and ground stations.

We look forward to receiving your contributions.

Dr. Giorgos P. Veldes
Guest Editor

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. Wind is an international peer-reviewed open access quarterly 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 1000 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

  • electroactive morphing
  • fluid–structure
  • aerodynamic
  • ionosphere
  • space weather
  • solar observations

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Published Papers (2 papers)

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Research

15 pages, 1623 KiB  
Article
Examining the Main Properties of a “Meso-Scale” Torsional Flutter Harvester in Gusty Winds
by Luca Caracoglia
Wind 2025, 5(2), 10; https://doi.org/10.3390/wind5020010 - 27 Apr 2025
Viewed by 81
Abstract
This study examines output energy and efficiency of a torsional flutter harvester in gusty winds. The proposed apparatus exploits the torsional flutter of a rigid flapping foil, able to rotate about a pivot axis located in the proximity of the windward side. The [...] Read more.
This study examines output energy and efficiency of a torsional flutter harvester in gusty winds. The proposed apparatus exploits the torsional flutter of a rigid flapping foil, able to rotate about a pivot axis located in the proximity of the windward side. The apparatus operates at the “meso-scale”; i.e., the apparatus’ projected area is equal to a few square meters. It has unique properties in comparison with most harvesting devices and small wind turbines. The reference geometric chord length of the flapping foil is about one meter. Energy conversion is achieved by an adaptable linkage connected to a permanent magnet that produces eddy currents in a multi-loop winding coil. Operational conditions and the post-critical flutter regime are investigated by numerical simulations. Several configurations are examined to determine the output power and to study the effects of stationary turbulent flows on the energy-conversion efficiency. This paper is a continuation of recent studies. The goal is to examine the operational conditions of the apparatus for a potentially wide range of applications and moderate mean wind speeds. Full article
(This article belongs to the Special Issue Selected Papers from ERCOFTAC SIG41 Symposium on "Fluid–Structure Interaction in Complex Systems: From Aero to Astro")
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16 pages, 18100 KiB  
Article
Flow Patterns Providing Maximum Speed-Up Ratio and Maximum Speed-Up Area of Pedestrian-Level Winds
by Qiang Lin, Naoko Konno, Hideyuki Tanaka, Qingshan Yang and Yukio Tamura
Wind 2025, 5(1), 8; https://doi.org/10.3390/wind5010008 - 18 Mar 2025
Viewed by 173
Abstract
Wind speed increases in pedestrian-level spaces around high-rise buildings tend to cause uncomfortable and even unsafe wind conditions for pedestrians. Especially, instantaneous strong winds can have a significant impact on the body sensation of pedestrians, and they are usually related to complex flow [...] Read more.
Wind speed increases in pedestrian-level spaces around high-rise buildings tend to cause uncomfortable and even unsafe wind conditions for pedestrians. Especially, instantaneous strong winds can have a significant impact on the body sensation of pedestrians, and they are usually related to complex flow patterns around buildings. A detailed examination of flow patterns corresponding to instantaneous strong wind events around high-rise buildings is essential to understanding the physical mechanism of this phenomenon. To quantitatively evaluate the pedestrian-level wind environment around high-rise buildings, two important indices, speed-up ratio and speed-up area, have usually been introduced. In this study, a Large Eddy Simulation (LES) was conducted for square-section building models with different heights, represented by H (=100 m, 200 m, and 400 m in full-scale) or aspect ratios, represented by H/B0 (=2, 4, and 8), where B0 (=50 m in full-scale) represents the building width. Two instantaneous strong wind events providing a “maximum speed-up ratio” and a “maximum speed-up area” of pedestrian-level wind are investigated based on a conditional average method. The results indicate that these two instantaneous strong wind events usually do not occur simultaneously. Flow patterns around buildings for the two events are also different: the contribution of downwash tends to be larger for strong wind events providing “maximum speed-up area” showing more three-dimensional characteristics. Full article
(This article belongs to the Special Issue Selected Papers from ERCOFTAC SIG41 Symposium on "Fluid–Structure Interaction in Complex Systems: From Aero to Astro")
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