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Fluids
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Turbulent Flow (Volume II)
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Special Issue "Turbulent Flow (Volume II)"

A special issue of Fluids (ISSN 2311-5521). This special issue belongs to the section "Turbulence".

Deadline for manuscript submissions: 31 October 2023 | Viewed by 1082

Special Issue Editor

Prof. Dr. Martin Skote

E-Mail Website1 Website2
Guest Editor
School of Aerospace, Transport and Manufacturing, Cranfield University, Cranfield MK43 0AL, UK
Interests: turbulence; boundary layer flows; flow control; atmospheric flow; air pollution dispersion; direct numerical simulation (DNS); computational fluid dynamics (CFD); turbulence modelling; fluid dynamics applied on biophysics; modelling of plasma actuator; aerodynamics; flapping wing insect flight; aerospace landing systems
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Turbulent flows are ubiquitous in both nature and in technological applications, as well as in everyday life. In the transport sector, for example, a large amount of energy spent on overcoming the resistance created by turbulence. Despite tremendous efforts, many features of turbulence are still not completely understood. Nevertheless, various control methods are under development that could provide a leap towards a greener transport sector. The advances of computational resources have enabled direct numerical simulations as a means to investigate turbulent flows, although confined to relatively low Reynolds numbers, which is a severe limitation when considering applications in the transport sector. On the other hand, the detailed flow analysis which is possible with numerical simulations provides insights previously undetected by experimental studies. Hence, the combination of computational and experimental investigations is more important than ever. The goal of this Special Issue is to be a forum for recent developments in theory, experiments, and computations on turbulent flows, with a special focus on flow control aiming at more environment-friendly transport systems. In addition, turbulent flows in nature are of interest since they provide many opportunities for biomimetic technological advancements.

Prof. Dr. Martin Skote
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. 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 1600 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

  • turbulent boundary layer flow
  • internal flow with turbulence and combustion
  • turbulent flow control
  • turbulence in atmospheric flow and in natural systems
  • direct numerical simulations/CFD/experiments

Related Special Issue

Published Papers (2 papers)

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Article
Energy and Information Fluxes at Upper Ocean Density Fronts
by
Pablo Cornejo
and
Adolfo Bahamonde
Fluids 2023, 8(1), 17; https://doi.org/10.3390/fluids8010017 - 02 Jan 2023
Viewed by 464
Abstract
We present large eddy simulations of a midlatitude open ocean front using a modified state-of-the-art computational fluid dynamics code. We investigate the energy and information fluxes at the submesoscale/small-scale range in the absence of any atmospheric forcing. We find submesoscale conditions ( [...] Read more.
We present large eddy simulations of a midlatitude open ocean front using a modified state-of-the-art computational fluid dynamics code. We investigate the energy and information fluxes at the submesoscale/small-scale range in the absence of any atmospheric forcing. We find submesoscale conditions (Ro∼1, Ri∼1) near the surface within baroclinic structures, related to partially imbalanced frontogenetic activity. Near the surface, the simulations show a significant scale coupling on scales larger than ∼103 (m). This is manifested as a strong direct energy cascade and intense mutual communication between scales, where the latter is evaluated using an estimator based on Mutual Information Theory. At scales smaller than ∼103 (m), the results show near-zero energy flux; however, at this scale range, the estimator of mutual communication still shows values corresponding with a significant level of communication between them. This fact motivates investigation into the nature of the self-organized turbulent motion at this scale range with weak energetic coupling but where communication between scales is still significant and to inquire into the existence of synchronization or functional relationships between scales, with emphasis on the eventual underlying nonlocal processes. Full article
(This article belongs to the Special Issue Turbulent Flow (Volume II))
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Brief Report
Comparison of Mean Properties of Turbulent Pipe and Channel Flows at Low-to-Moderate Reynolds Numbers
by
Carmine Di Nucci
and
Rafik Absi
Fluids 2023, 8(3), 97; https://doi.org/10.3390/fluids8030097 - 08 Mar 2023
Viewed by 398
Abstract
We focus on the fully developed turbulent flow in circular pipes and channels. We provide a comparison of the mean velocity profiles, and we compute the values of the global indicators, such as the skin friction, the mean velocity, the centerline velocity, the [...] Read more.
We focus on the fully developed turbulent flow in circular pipes and channels. We provide a comparison of the mean velocity profiles, and we compute the values of the global indicators, such as the skin friction, the mean velocity, the centerline velocity, the displacement thickness, and the momentum thickness. The comparison is done at low-to-moderate Reynolds numbers. For channel flow, we deduced the mean velocity profiles using an indirect turbulent model; for pipe flow, we extracted the needed information from a direct numerical simulation database available in the open literature. A one-to-one comparison of these values at identical Reynolds numbers provides a deep insight into the difference between pipe and channel flows. This line of reasoning allows us to highlight some deviations among the mean velocity profiles extracted from different pipe databases. Full article
(This article belongs to the Special Issue Turbulent Flow (Volume II))
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