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Symmetry
Special Issues
Fluid Flow and Heat Transfer, Symmetry and Asymmetry
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Fluid Flow and Heat Transfer, Symmetry and Asymmetry

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Engineering and Materials".

Deadline for manuscript submissions: closed (31 January 2024) | Viewed by 3381

Special Issue Editors

Dr. Amin Amiri Delouei

E-Mail Website
Guest Editor
Mechanical Engineering Department, University of Bojnord, Bojnord, Iran
Interests: heat transfer; LBM; IBM; functionally graded materials; composites; ultrasonic vibration; nanofluid
Dr. Hasan Sajjadi

E-Mail Website
Guest Editor
Mechanical Engineering Department, University of Bojnord, Bojnord 945 3155111, Iran
Interests: turbulent flow; nano fluid; CFD; LBM; particle deposition
Special Issues, Collections and Topics in MDPI journals
Dr. Meysam Atashafrooz

E-Mail Website
Guest Editor
Department of Mechanical Engineering, Sirjan University of Technology, Sirjan, Iran
Interests: radiative heat transfer; nanofluid; MHD; CFD; entropy generation

Special Issue Information

Dear Colleagues,

Heat transfer and fluid flow are phenomena that are abundantly seen in nature and in various industrial applications. Further research in this field will help us better understand the symmetric/asymmetric nature of laminar/turbulent fluid flow regimes, as well as different mechanisms of heat transfer, including conduction, convection, and radiation.

This Special Issue aims to present the latest numerical, analytical, and experimental studies in the fields of fluid flow and heat transfer. Topics of interest include, but are not limited to:

  • Symmetry/asymmetry in laminar fluid flow;
  • Symmetry/asymmetry in turbulent fluid flow;
  • Conductive heat transfer;
  • Convective heat transfer;
  • Radiative heat transfer;
  • Nanofluid;
  • Non-Newtonian fluid;
  • Porous media;
  • Heat exchanger;
  • Heat transfer enhancement;
  • Computational fluid dynamics (CFD);
  • Fluid–solid interactions (FSI);
  • Lattice–Boltzmann method (LBM);
  • Immersed boundary methods (IBM).

Dr. Amin Amiri Delouei
Dr. Hasan Sajjadi
Dr. Meysam Atashafrooz
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. Symmetry 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 2400 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

  • fluid flow
  • heat transfer
  • nanofluid
  • non-Newtonian fluid
  • heat transfer enhancement
  • computational fluid dynamics (CFD)

Published Papers (3 papers)

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Research

16 pages, 2065 KiB  
Article
Thermally Driven Convection Generated by Reaction Fronts in Viscous Fluids
by Pablo M. Vilela, Roberto Guzman and Desiderio A. Vasquez
Symmetry 2024, 16(3), 269; https://doi.org/10.3390/sym16030269 - 23 Feb 2024
Viewed by 513
Abstract
Reaction fronts propagating in liquids separate reacted from unreacted fluid. These reactions may release heat, increasing the temperature of the propagating medium. As fronts propagate, they will induce density changes leading to convection. Exothermic fronts that propagate upward increase the temperature of the [...] Read more.
Reaction fronts propagating in liquids separate reacted from unreacted fluid. These reactions may release heat, increasing the temperature of the propagating medium. As fronts propagate, they will induce density changes leading to convection. Exothermic fronts that propagate upward increase the temperature of the reacted fluid located underneath the front. For positive expansion coefficients, the warmer fluid will tend to rise due to buoyancy. In the opposite case, for fronts propagating downward with the warmer fluid on top, an unexpected thermally driven instability can also take place. In this work, we carry out a linear stability analysis introducing perturbations of fixed wavelength. We obtain a dispersion relation between the perturbation wave number and its growth rate. For either direction of propagation, we find that the front is stable for very short wavelengths, but is unstable for large enough wavelengths. We carry out a numerical solution of a cubic reaction–diffusion–advection equation coupled to Navier–Stokes hydrodynamics in a two-dimensional rectangular domain. We find transitions between the non-axisymmetric and axisymmetric fronts increasing with the width of the domain. Full article
(This article belongs to the Special Issue Fluid Flow and Heat Transfer, Symmetry and Asymmetry)
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19 pages, 5879 KiB  
Article
Experimental Study on the Influence of Interfacial Energy Instability on the Flow Pattern Spatiotemporal Evolution of Thermal- Buoyant Capillary Convection
by Shuo Zhang, Ruquan Liang and Shuo Yang
Symmetry 2023, 15(2), 506; https://doi.org/10.3390/sym15020506 - 14 Feb 2023
Cited by 2 | Viewed by 821
Abstract
The effect of the instability of the interface morphology due to mechanical disturbances and acceleration changes (or gravity flutter) on Marangoni convective stability has been confirmed via space experiments. However, compared with the research on Marangoni convection with an axisymmetric liquid bridge, research [...] Read more.
The effect of the instability of the interface morphology due to mechanical disturbances and acceleration changes (or gravity flutter) on Marangoni convective stability has been confirmed via space experiments. However, compared with the research on Marangoni convection with an axisymmetric liquid bridge, research on the transition and interface flow behavior of Marangoni convection with a non-axisymmetric liquid bridge is not sufficiently deep. Based on the thermal-buoyant capillary convection (TBCC) experiment of the conventional liquid bridge, in this study, the influence of the interfacial energy instability triggered by the gravitational tilt angle (GTA) on the spatiotemporal evolution of the flow pattern and velocity distribution of the thermal-buoyant capillary convection is examined by applying the GTA to form the non-axisymmetric liquid bridge model. The results show that the non-equilibrium change in the interface curvature due to GTA leads to a non-axisymmetric liquid bridge morphology. With increasing GTA, the cell-flow morphology during the development process is restricted, transverse/longitudinal velocity component is suppressed, and velocity peak value position gradually approaches the interface. In the oscillating TBCC stage, the deviation of cell flow vortex cores from the intermediate height intensifies with the increasing GTA, resulting in the expansion of the alternating flow zone in the center. Furthermore, the longitudinal velocity component distribution is transformed into the “two peaks and one valley” morphology (“M”-type) from the original multi-peak morphology. The interfacial energy instability due to the GTA can increase the critical temperature difference of the oscillating TBCC, maintain its stability, and delay the onset of the oscillating flow. Simultaneously, the oscillation frequency of the oscillating TBCC is reduced and the development of the oscillating TBCC is suppressed. Full article
(This article belongs to the Special Issue Fluid Flow and Heat Transfer, Symmetry and Asymmetry)
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21 pages, 21743 KiB  
Article
Analytical Study of the Energy Loss Reduction during Three-Dimensional Engine Oil-Based Hybrid Nanofluid Flow by Using Cattaneo–Christov Model
by Ramadan A. ZeinEldin, Asad Ullah, Hamiden Abd El-Wahed Khalifa and Muhammad Ayaz
Symmetry 2023, 15(1), 166; https://doi.org/10.3390/sym15010166 - 06 Jan 2023
Cited by 7 | Viewed by 1536
Abstract
In this work, we analyzed the hybrid nanofluid (Ag+CuO+kerosene oil) flow past a bidirectionally extendable surface in the presence of a variable magnetic field. The hybrid nanofluid flow considered is electrically conductive and steady. For the simulation of the problem, the Cattaneo–Christov double-diffusion [...] Read more.
In this work, we analyzed the hybrid nanofluid (Ag+CuO+kerosene oil) flow past a bidirectionally extendable surface in the presence of a variable magnetic field. The hybrid nanofluid flow considered is electrically conductive and steady. For the simulation of the problem, the Cattaneo–Christov double-diffusion (CCDD) model was considered, which generalizes Fourier’s and Fick’s laws. The impact of the Hall current produced was taken into account. The physical problem was transformed into a mathematical form with the help of suitable transformations to reduce the complexity of the problem. The transformed system of coupled ordinary differential equations (ODEs) was solved with the semi-analytical method. The results are plotted in comparison with the ordinary nanofluid (CuO+kerosene oil) and hybrid nanofluid (Ag+CuO+kerosene oil). The impact of various parameters (Pr,Sc,γ0,m,M,Nb,Nt,ϵ1,ϵ2) on the state variables is described. The velocity gradient under the impact of the mass flux and magnetic parameter shows a decreasing behavior, while the Hall parameter and the stretching ratio show an increasing behavior. Moreover, the skin friction, rate of heat, and mass transfer are numerically displayed through tables. In this work, we found that the thermal and concentration relaxation coefficients showed a decreasing behavior for their increasing trends. For the validation of the implemented technique, the squared residuals are computed in Table 2, which shows that the increasing number of iterations decreases the squared residual error. The results show that Ag+CuO+kerosene oil has good performance in the reduction of the heat transfer rate. Full article
(This article belongs to the Special Issue Fluid Flow and Heat Transfer, Symmetry and Asymmetry)
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