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Inventions
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Recent Trends in Nanofluids III
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Recent Trends in Nanofluids III

A special issue of Inventions (ISSN 2411-5134). This special issue belongs to the section "Inventions and Innovation in Energy and Thermal/Fluidic Science".

Deadline for manuscript submissions: closed (31 May 2022) | Viewed by 16152

Special Issue Editors

Dr. M. M. Bhatti

E-Mail Website
Guest Editor
College of Mathematics and Systems Science, Shandong University of Science and Technology, Qingdao, China
Interests: mathematical physics; nonlinear waves; numerical simulations; perturbation methods; single- and multi-phase thermofluids; magnetohydrodynamics; nanofluids
Special Issues, Collections and Topics in MDPI journals
Dr. Sara I. Abdelsalam

E-Mail Website
Guest Editor
Basic Science, Faculty of Engineering, The British University in Egypt, Al-Shorouk City, Cairo 11837, Egypt
Interests: applied mathematics; fluid mechanics; blood flows; nanofluids
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue follows the publications of "Recent Trends in Nanofluids" and “Recent Trends in Nanofluids – II”, which presented 12 high-quality papers.

This Special Issue invites you to contribute your original research work and review articles on “nanofluids”, which either are advances of state-of-the-art mathematical methods or theoretical or experimental studies or extend the bounds of existing methodologies to new contributions to address current challenges. We hope that this issue will provide up-to-date findings to the readers and the scientific community for application to the benefit of the industrial sector.

Potential topics include, but are not limited to, the following:

  • Nanofluids;
  • Particle shape effects;
  • Hybrid nanofluids;
  • Convective heat and mass transfer;
  • Steady and unsteady flow problems;
  • Particle–fluid motion;
  • Thermodynamics;
  • Physiological fluid phenomena in biological systems;
  • Numerical and analytical simulations.

Dr. M. M. Bhatti
Dr. Sara I. Abdelsalam
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. Inventions 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 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

  • heat and mass transfer
  • nanofluids
  • nonlinear waves
  • hemodynamic flow
  • thermodynamics
  • magnetohydrodynamics
  • numerical and analytical methods

Published Papers (6 papers)

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Research

14 pages, 10816 KiB  
Article
Mass Transfer Effects on the Mucus Fluid with Pulsatile Flow Influence of the Electromagnetic Field
by Padmavathi Thiyagarajan, Senthamilselvi Sathiyamoorthy, Karuppusamy Loganathan, Oluwole Daniel Makinde and Ioannis E. Sarris
Inventions 2022, 7(3), 50; https://doi.org/10.3390/inventions7030050 - 24 Jun 2022
Cited by 5 | Viewed by 1506
Abstract
The influence of pulsatile flow on the oscillatory motion of an incompressible conducting boundary layer mucus fluid flowing through porous media in a channel with elastic walls is investigated. The oscillatory flow is treated as a cyclical time-dependent flux. The Laplace transform method [...] Read more.
The influence of pulsatile flow on the oscillatory motion of an incompressible conducting boundary layer mucus fluid flowing through porous media in a channel with elastic walls is investigated. The oscillatory flow is treated as a cyclical time-dependent flux. The Laplace transform method using the Womersley number is used to solve non-linear equations controlling the motion through porous media under the influence of an electromagnetic field. The theoretical pulsatile flow of two liquid phase concurrent fluid streams, one kinematic and the other viscoelastic, is investigated in this study. To extend the model for various physiological fluids, we postulate that the viscoelastic fluid has several distinct periods. We also apply our analytical findings to mucus and airflow in the airways, identifying the wavelength that increases dynamic mucus permeability. The microorganism’s thickness, velocity, energy, molecular diffusion, skin friction, Nusselt number, Sherwood number, and Hartmann number are evaluated. Discussion is also supplied in various sections to investigate the mucosal flow process. Full article
(This article belongs to the Special Issue Recent Trends in Nanofluids III)
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25 pages, 695 KiB  
Article
Solution of Steady Incompressible MHD Problems with Quasi-Least Square Method
by Shahid Hussain, Shams ur Rahman, Suhail Abbas and Munawwar Ali Abbas
Inventions 2022, 7(2), 40; https://doi.org/10.3390/inventions7020040 - 6 Jun 2022
Viewed by 1422
Abstract
A quasi-least-squares (QLS) mixed finite element method (MFE) based on the L2-inner product is utilized to solve an incompressible magnetohydrodynamic (MHD) model. These models are associated with the three unknown terms, i.e., fluid velocity, fluid pressure, and magnetic field. For the [...] Read more.
A quasi-least-squares (QLS) mixed finite element method (MFE) based on the L2-inner product is utilized to solve an incompressible magnetohydrodynamic (MHD) model. These models are associated with the three unknown terms, i.e., fluid velocity, fluid pressure, and magnetic field. For the MHD-based models, common theories and algorithms for approximation of the solutions are not always applicable because of the choice of the functional spaces during the utilization of the weak formulation. It is well known that the spaces used for the approximation of the different unknowns, e.g., the spaces for the unknowns, cannot be chosen independently for the variational formulation, and may have to satisfy strict stability conditions such as the inf-sup, or Ladyzhenskaya–Babuska–Brezzi (LBB) condition. The dependency of the selection of the spaces for the unknowns are critical and always not applicable for some pair of unknowns. Because of this, the numerical or theoretical solutions must have to face some stability issue. The proposed scheme (L2-inner product) is introduced to circumvent this deficiency of the conditions (inf-sup or LBB) and obtained a well-posed solution theoretically. The model equations are nonlinear and highly coupled with the combination of Navier–Stokes and Maxwell relations. First, these nonlinear models are made linear around a specific state wherein the modified system represents an algebraic equation in a first-order symmetric form. Secondly, a direct iteration technique is applied to solve the nonlinearities and obtain a theoretical convergent rate for a general initial guess. Theoretical results show that only a single parameter with a single initial guess is sufficient to establish the well-posedness of the solution. Full article
(This article belongs to the Special Issue Recent Trends in Nanofluids III)
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27 pages, 11770 KiB  
Article
An Investigation on the Vortex Effect of a CALM Buoy under Water Waves Using Computational Fluid Dynamics (CFD)
by Chiemela Victor Amaechi and Jianqiao Ye
Inventions 2022, 7(1), 23; https://doi.org/10.3390/inventions7010023 - 4 Feb 2022
Cited by 3 | Viewed by 3757
Abstract
Floating offshore structures (FOS) must be designed to be stable, to float, and to be able to support other structures for which they were designed. These FOS are needed for different transfer operations in oil terminals. However, water waves affect the motion response [...] Read more.
Floating offshore structures (FOS) must be designed to be stable, to float, and to be able to support other structures for which they were designed. These FOS are needed for different transfer operations in oil terminals. However, water waves affect the motion response of floating buoys. Under normal sea states, the free-floating buoy presents stable periodic responses. However, when moored, they are kept in position. Mooring configurations used to moor buoys in single point mooring (SPM) terminals could require systems such as Catenary Anchor Leg Moorings (CALM) and Single Anchor Leg Moorings (SALM). The CALM buoys are one of the most commonly-utilised type of offshore loading terminal. Due to the wider application of CALM buoy systems, it is necessary to investigate the fluid structure interaction (FSI) and vortex effect on the buoy. In this study, a numerical investigation is presented on a CALM buoy model conducted using Computational Fluid Dynamics (CFD) in ANSYS Fluent version R2 2020. Some hydrodynamic definitions and governing equations were presented to introduce the model. The results presented visualize and evaluate specific motion characteristics of the CALM buoy with emphasis on the vortex effect. The results of the CFD study present a better understanding of the hydrodynamic parameters, reaction characteristics and fluid-structure interaction under random waves. Full article
(This article belongs to the Special Issue Recent Trends in Nanofluids III)
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13 pages, 4230 KiB  
Article
A Numerical Analysis of Fluid Flow and Torque for Hydropower Pelton Turbine Performance Using Computational Fluid Dynamics
by Mohammed A. Qasim, Vladimir I. Velkin, Sergey E. Shcheklein, Abduljabbar O. Hanfesh, Talib Z. Farge and Fadl A. Essa
Inventions 2022, 7(1), 22; https://doi.org/10.3390/inventions7010022 - 3 Feb 2022
Cited by 5 | Viewed by 3358
Abstract
The difficulty of delivering electrical power to rural areas motivated the researchers to explore more accessible power sources. Hydropower is considered a desirable option due to its sustainability and lower costs. Pelton turbines have been widely used in hydropower plants because of their [...] Read more.
The difficulty of delivering electrical power to rural areas motivated the researchers to explore more accessible power sources. Hydropower is considered a desirable option due to its sustainability and lower costs. Pelton turbines have been widely used in hydropower plants because of their low installation and maintenance costs. This study provides a computational fluid dynamics (CFD) model for Pelton turbine performance under various flow conditions. The model is based on the conservation of mass principle, Newton’s second law, and the first law of thermodynamics. It is used to predict the torque produced by a turbine at different rotational speeds. Previously published experimental results for the same turbine geometry and flow parameters were used to validate the model’s predictions. Validation revealed that the model can reproduce the experimental results. This provides the required robustness for its use as a tool for turbine design and modification. Full article
(This article belongs to the Special Issue Recent Trends in Nanofluids III)
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12 pages, 2469 KiB  
Article
Nanofluid Transport through a Complex Wavy Geometry with Magnetic and Permeability Effects
by Muhammad Saleem Iqbal, Abuzar Ghaffari, Arshad Riaz, Irfan Mustafa and Muhammad Raza
Inventions 2022, 7(1), 7; https://doi.org/10.3390/inventions7010007 - 25 Dec 2021
Cited by 12 | Viewed by 2390
Abstract
The current article incorporates the numerical investigation of heat exchange rate and skin friction carried out through nanofluid saturated with thermally balanced porous medium over a rough horizontal surface that follows the sinusoidal waves. The effects of the external magnetic field are discussed [...] Read more.
The current article incorporates the numerical investigation of heat exchange rate and skin friction carried out through nanofluid saturated with thermally balanced porous medium over a rough horizontal surface that follows the sinusoidal waves. The effects of the external magnetic field are discussed by managing the magnetic field strength applied normally to the flow pattern. The occurring partial differential governing equations are grasped through a strong numerical scheme of the Keller box method (KBM) against the various parameters. The findings are elaborated through tables and diagrams of velocity, temperature, skin friction, Nusselt number, streamlines, and heat lines. The percentage increase in Nusselt number and coefficient of skin friction over the flat and wavy surface is calculated which leads to the conclusion that the copper (Cu) nanoparticles are better selected as compared to the silver (Ag) for heat transfer enhancement. It is also evident from sketches that the current analysis can be used to enhance the surface drag force by means of nanoparticles. It is a matter of interest that the magnetic field can be used to manage the heat transfer rate in such a complicated surface flow. The current readings have been found accurate and valid when compared with the existing literature. Full article
(This article belongs to the Special Issue Recent Trends in Nanofluids III)
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16 pages, 8021 KiB  
Article
The Impact of Cattaneo–Christov Double Diffusion on Oldroyd-B Fluid Flow over a Stretching Sheet with Thermophoretic Particle Deposition and Relaxation Chemical Reaction
by Bheemasandra M. Shankaralingappa, Ballajja C. Prasannakumara, Bijjanal J. Gireesha and Ioannis E. Sarris
Inventions 2021, 6(4), 95; https://doi.org/10.3390/inventions6040095 - 25 Nov 2021
Cited by 24 | Viewed by 2184
Abstract
The current study focuses on the characteristics of flow, heat, and mass transfer in the context of their applications. There has been a lot of interest in the use of non-Newtonian fluids in biological and technical disciplines. Having such a substantial interest in [...] Read more.
The current study focuses on the characteristics of flow, heat, and mass transfer in the context of their applications. There has been a lot of interest in the use of non-Newtonian fluids in biological and technical disciplines. Having such a substantial interest in non-Newtonian fluids, our goal is to explore the flow of Oldroyd-B liquid over a stretching sheet by considering Cattaneo–Christov double diffusion and heat source/sink. Furthermore, the relaxation chemical reaction and thermophoretic particle deposition are considered in the modelling. The equations that represent the indicated flow are changed to ordinary differential equations (ODEs) by choosing relevant similarity variables. The reduced equations are solved using the Runge–Kutta–Fehlberg fourth–fifth order technique (RKF-45) and a shooting scheme. Physical descriptions are strategized and argued using graphical representations to provide a clear understanding of the behaviour of dimensionless parameters on dimensionless velocity, concentration, and temperature profiles. The results reveal that the rising values of the rotation parameter lead to a decline in the fluid velocity. The rise in values of relaxation time parameters of temperature and concentration decreases the thermal and concentration profiles, respectively. The increase in values of the heat source/sink parameter advances the thermal profile. The rise in values of the thermophoretic and chemical reaction rate parameters declines the concentration profile. Full article
(This article belongs to the Special Issue Recent Trends in Nanofluids III)
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