Article
Physics, Multidisciplinary
Salim Hamrelaine, Mohamed Kezzar, Mohamed Rafik Sari, Mohamed R. Eid
Summary: This paper investigates the flow characteristics of ferro-nanofluid in rotating converging/diverging channels, considering the influence of various physical variables on velocity and friction coefficient, and presents the unique flow phenomena of ferrofluid in rotating channels.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Thermodynamics
M. Gnaneswara Reddy, M. Ferdows
Summary: The hydromagnetic flow of energy and species transfer behavior of micropolar dusty fluid on a paraboloid revolution has been studied numerically, showing significant influence of magnetic parameter, material parameter, and kr values on fluid and dust phase velocity, angular velocity, energy, and species fields.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Multidisciplinary Sciences
Jose. M. M. Lopez, Sebastian. A. A. Altmeyer
Summary: In this study, direct numerical simulations of the Taylor-Couette flow of a dilute polymer solution with a rotating inner cylinder and moderate curvature were conducted. The existence of a novel elasto-inertial rotating wave characterized by arrow-shaped structures of the polymer stretch field aligned with the streamwise direction was discovered. The dependence of this rotating wave pattern on the dimensionless Reynolds and Weissenberg numbers was analyzed, and other flow states with coexisting arrow-shaped structures were identified for the first time.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Mathematics, Applied
Krzysztof A. Mizerski
Summary: The turbulent hydromagnetic dynamo is a process of magnetic field generation by chaotic flow of an electrically conducting fluid, responsible for creating large-scale magnetic fields of astrophysical objects. The analysis aims to provide analytic expressions for the large-scale electromotive force in the limit of rapid rotation, considering both Lorentz force and nonlinear evolution of turbulent fluctuations. The renormalization group technique is applied to extract the final expression for the mean EMF from the full nonlinear dynamical equations.
APPLIED MATHEMATICS AND COMPUTATION
(2021)
Article
Thermodynamics
Tasawar Hayat, Arsalan Aziz, Ahmed Alsaedi
Summary: This article investigates entropy production in three-dimensional hydromagnetic rotating flow of nanoliquid with binary chemical mechanism and activation energy impacts. Brownian dispersion and thermophoresis effects are taken into account, and various flow variables are analyzed graphically to examine the behavior of heat and mass transfer rates.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Physics, Multidisciplinary
Yusry O. El-Dib, Galal M. Moatimid, Amal A. Mady, Marwa H. Zekry
Summary: This paper deals with the nonlinear stability analysis of rotating magnetic fluid columns, focusing on the influence on atmospheric and oceanic motions. By considering factors such as the Coriolis force and reduced pressure, the governing equations of the system are analyzed, and the nonlinear characteristic dispersion equation is studied using the homotopy perturbation technique.
INDIAN JOURNAL OF PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Rafal Bielas, Bassam Jameel, Andrzej Skumiel, Milan Timko, Peter Kopcansky, Arkadiusz Jozefczak
Summary: Emulsion stabilized by solid particles, known as Pickering emulsion, can be efficiently heated by a rotating magnetic field. This study demonstrates the improved heating effect of rotating magnetic field on magnetic nanoparticle-stabilized emulsion compared to alternating magnetic fields.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Mathematics
Ishtiaq Ali, Taza Gul, Arshad Khan
Summary: The aim of this research is to investigate the influence of a magnetic field on the unsteady flow of a hybrid nanofluid over a spinning disk that is inclined and stretched within a non-Darcy porous medium. The effects of Joule heating, viscous dissipation, thermal radiation, thermal and velocity slip conditions are considered. The governing equations and boundary constraints are converted into dimensionless form and solved numerically using the RK-4 method, with the results validated through neural networking. The temperature of the hybrid nanofluid increases with the porosity parameter, unsteadiness factor, Eckert number, magnetic field, and Forchheimmer number, while the thermal heat decreases near the disk and increases away from it with the radiation factor. The obtained results are in good agreement with established ones, ensuring their accuracy.
Article
Astronomy & Astrophysics
Ram Prasad Prajapati, Ephrem Tesfaye Desta, Mei-Ching Fok, Tigistu Haile Eritro
Summary: In this study, the dissipation of hydromagnetic waves and pressure-anisotropy-driven fluid instabilities in the polytropic zone of the solar wind is investigated using the generalized polytrope pressure laws. The theoretical results are found to be in good agreement with the observational data, and it is shown that the considered parameters have significant effects on the wave dissipation time. These results are helpful for exploring the possibilities of MHD waves and pressure-anisotropy-driven fluid instabilities in the polytropic zone of the solar wind, which may be observed by the Parker Solar Probe mission.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Thermodynamics
Andrzej Skumiel, Peter Kopcansky, Milan Timko, Matus Molcan, Katarina Paulovicova, Rafal Wojciechowski
Summary: The physical principles of magnetic hyperthermia are based on the heat generation of magnetic nanoparticles under the influence of applied magnetic fields of different configurations. The choice of a suitable methodology for generating a magnetic field can significantly affect the resulting thermal effect and thus the efficiency itself. By comparing the efficiency when the rotating magnetic field is applied versus the alternating magnetic field, it was found that the former produces more than twice the thermal effect under similar experimental conditions.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Computer Science, Interdisciplinary Applications
Brinda Halambi, B. N. Hanumagowda, J. Santhosh Kumar, Umair Khan, El-Sayed M. Sherif, Jasgurpreet Singh Chohan, B. Shilpa, Ioan Pop
Summary: This study analyzes the effects of a micropolar fluid squeezing film between porous elliptical plates under an external magnetic field. It is found that the combination of a micropolar lubricant with a magnetic field significantly increases load-carrying capacity, pressure distribution, and response time. However, increasing the fluid gap number and coupling number also enhances lubrication characteristics, while the presence of pores on the main fluid flow path limits the lubrication performance.
INTERNATIONAL JOURNAL OF MODERN PHYSICS C
(2023)
Article
Physics, Multidisciplinary
Maria Tatulea-Codrean, Eric Lauga
Summary: By studying the synchronization of bacterial flagella through an elastohydrodynamic mechanism, this study shows that bacterial flagella spontaneously synchronize with zero phase difference. The far-field rate of synchronization is maximized at an intermediate value of elastic compliance, which has important implications for bacteria.
PHYSICAL REVIEW LETTERS
(2022)
Article
Mathematics, Applied
Kondethimmanahalli Rangadhamappa Raghunatha, Inapura Siddagangaiah Shivakumara
Summary: This study investigates the linear instability and weakly nonlinear stability of rotating double-diffusive convection in a viscoelastic fluid layer, using an Oldroyd-B constitutive equation. It reveals significant departures from other diffusive systems and contradictory instability characteristics among different types of fluids. Additionally, the influence of viscoelastic parameters on stability and heat/mass transfer is elucidated through linear instability and weakly nonlinear stability analyses.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2021)
Article
Materials Science, Multidisciplinary
Zs Iszaly, I. G. Marian, I. A. Szabo, A. Trombettoni, I Nandori
Summary: The main idea of magnetic hyperthermia is to locally increase body temperature by means of injected superparamagnetic nanoparticles, absorbing energy from an external magnetic field. The study demonstrates the influence of thermal effects on superlocalization and heating efficiency, showing similarities between deterministic and stochastic results in the presence of time-dependent steady state motions of the magnetization vector. It also highlights the importance of oscillating applied field in low frequency range for hyperthermia.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Engineering, Mechanical
B. Hari Babu, P. Srinivasa Rao, M. Gnaneswara Reddy, S. V. K. Varma
Summary: This study presents a mathematical model to explain the three-dimensional flow of Casson liquid through a stretchable rotating disk. The effects of magnetic field, chemical reaction, and activation energy are incorporated into the momentum and mass equations. The flow pattern is represented by ordinary differential equations and solved using the RKF45 method. The results demonstrate the influence of relevant parameters on thermal, mass, and velocity curves, as well as statistical values of skin friction, Nusselt number, and Sherwood number.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2023)