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Special Issue "Turbulence and Fluid Mechanic"

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A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "J2: Thermodynamics".

Deadline for manuscript submissions: 31 August 2023 | Viewed by 1607

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Dear Colleagues,

We are pleased to announce a Special Issue of the journal Energies on the topic of Turbulence and Fluid Mechanics. We invite submissions related to experimental, numerical, and theoretical studies.

Although issues related to turbulence and fluid mechanics have been extensively studied for a very long time and many answers have been found, many problems are still open, and a number of new interesting issues are constantly emerging.

The current Special Issue welcomes papers related to turbulence, vortex structures, and vortex dynamics, scientific, and engineering problems where turbulence is of main importance, including multiphase flows and general fluid mechanics.

The purpose of this Special Issue is to collect a number of multidisciplinary problems linked by turbulence and fluid mechanics. We believe it would be very helpful for the community to find a new common ground for possible collaboration.

Dr. Ziemowit Malecha
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. Energies is an international peer-reviewed open access semimonthly 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 2200 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

turbulence
vortex structures
vortex dynamics and interactions hydro- and aerodynamics
multiphase flow

Published Papers (2 papers)

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Research

Open AccessArticle

Heat Transfer Analysis of Sisko Fluid Flow over a Stretching Sheet in a Conducting Field with Newtonian Heating and Constant Heat Flux

Pothala Jayalakshmi

Mopuri Obulesu

Charan Kumar Ganteda

Malaraju Changal Raju

Sibyala Vijayakumar Varma

and

Giulio Lorenzini

Energies 2023, 16(7), 3183; https://doi.org/10.3390/en16073183 - 31 Mar 2023

Viewed by 413

Abstract

The present study investigates the steady three-dimensional flow of a Sisko fluid over a bidirectional stretching sheet under the influence of Lorentz force. Heat transfer effects have been carried out for constant heat flux and Newtonian heating systems. The transformed governing equations of the flow model are solved by using the spectral relaxation method (SRM), taking into account similarity transformations. The effects of controlling parameters on flow and derived quantities have been presented in the form of graphs and tables. Numerical benchmarks are used to characterise the effects of skin friction and heat transfer rates. It is noticed that in the case of Newtonian heating, the rate of heat transfer is higher than that in the constant heat flux case. As the stretching parameter increases, the fluid temperature decreases in both Newtonian heating and constant heat flux. It was discovered that successive over (under) relaxation (SOR) approaches will considerably boost the convergence speed and stability of the SRM system. The current findings strongly agree with earlier studies in the case of Newtonian fluid when the magnetic field is absent. Full article

(This article belongs to the Special Issue Turbulence and Fluid Mechanic)

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Open AccessArticle

Heat Transfer of Buoyancy and Radiation on the Free Convection Boundary Layer MHD Flow across a Stretchable Porous Sheet

Hari Mohan Srivastava

Ziad Khan

Pshtiwan Othman Mohammed

Eman Al-Sarairah

Muhammad Jawad

and

Rashid Jan

Energies 2023, 16(1), 58; https://doi.org/10.3390/en16010058 - 21 Dec 2022

Cited by 2 | Viewed by 672

Abstract

Theoretical influence of the buoyancy and thermal radiation effects on the MHD (magnetohydrodynamics) flow across a stretchable porous sheet were analyzed in the present study. The Darcy–Forchheimer model and laminar flow were considered for the flow problem that was investigated. The flow was taken to incorporate a temperature-dependent heat source or sink. The study also incorporated the influences of Brownian motion and thermophoresis. The general form of the buoyancy term in the momentum equation for a free convection boundary layer is derived in this study. A favorable comparison with earlier published studies was achieved. Graphs were used to investigate and explain how different physical parameters affect the velocity, the temperature, and the concentration field. Additionally, tables are included in order to discuss the outcomes of the Sherwood number, the Nusselt number, and skin friction. The fundamental governing partial differential equations (PDEs), which are used in the modeling and analysis of the MHD flow problem, were transformed into a collection of ordinary differential equations (ODEs) by utilizing the similarity transformation. A semi-analytical approach homotopy analysis method (HAM) was applied for approximating the solutions of the modeled equations. The model finds several important applications, such as steel rolling, nuclear explosions, cooling of transmission lines, heating of the room by the use of a radiator, cooling the reactor core in nuclear power plants, design of fins, solar power technology, combustion chambers, astrophysical flow, electric transformers, and rectifiers. Among the various outcomes of the study, it was discovered that skin friction surges for 0.3

\leq F_{1} \leq

0.6, 0.1

\leq k_{1} \leq

0.4 and 0.3

\leq M \leq

1.0, snf declines for 1.0

\leq G_{r} \leq

4.0. Moreover, the Nusselt number augments for 0.5

\leq R \leq

1.5, 0.2

\leq N_{t} \leq

0.8 and 0.3

\leq N_{b} \leq

0.9, and declines for 2.5

\leq P r \leq

5.5. The Sherwood number increases for 0.2

\leq N_{t} \leq

0.8 and 0.3

\leq S c \leq

0.9, and decreases for 0.1

\leq N_{b} \leq

0.7. Full article

(This article belongs to the Special Issue Turbulence and Fluid Mechanic)

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