Related references
Note: Only part of the references are listed.
Article
Mechanics
Xiang-Fei Zhang et al.
Summary: This study aims to understand the magnetohydrodynamic (MHD) flow around two identical tandem circular cylinders confined in a duct under an external axial magnetic field. The effects of magnetic field, inlet velocity of conducting fluid, and the gap ratio on the flow regimes, vortex shedding frequency, pressure coefficients, drag coefficients, and pressure drop are investigated. Four flow modes are observed, and the flow field presents the vortex shedding (VS) flow model for L/d > 5. The magnetic field and inlet velocity of the metal fluid have linear effects on the pressure drop delta P between the inlet and outlet.
Article
Mechanics
P. A. L. Ankush et al.
Summary: The study investigates the instability characteristics of double-diffusive mixed convective flow with viscosity stratification in a vertical channel. The viscosity of the fluid is modeled as an exponential function of temperature and concentration, with an activation energy parameter determining its sensitivity. Three scenarios are considered: thermal diffusion only, temperature and solute acting in the same direction, and temperature and solute acting in opposite directions. The results show that higher activation energy parameters lead to increased flow stability.
Article
Mechanics
Nastaran Naghshineh et al.
Summary: This work provides an analytical solution using power series expansion for the boundary-layer problem of Ostwald-de Waele power law fluids. The study extends the approach used for Newtonian fluids and the variable substitutions are chosen consistent with the large distance behavior. Contrary to previous literature, the solution exists only in the range of power law exponents 0.5 < alpha <= 1. An approximate analytical solution is obtained using a convergent power series with an asymptotically motivated gauge function in the range of approximately 0.74 <= a < 1.
Article
Mechanics
Abdul Samad Khan et al.
Summary: This investigation examines the stagnation point flow of non-Newtonian fluid under the influence of magnetohydrodynamics, porous medium, and mixed convection effects. The study also considers angular momentum and energy transport equations to explore fluid micro-rotational effects. Mathematical formulations yield a set of ordinary differential equations, which are solved numerically. The study is significant for applications in polymeric solutions, bio-medical functions, and lubrication problems.
Article
Multidisciplinary Sciences
Khalid Abdulkhaliq M. Alharbi et al.
Article
Materials Science, Multidisciplinary
Zia Ullah et al.
Summary: This study numerically investigates the temperature dependent thermal conductivity, surface heat flux, and magnetohydrodynamic effects on electromagnetic fluid across a magnetically vertical surface placed in a porous material. The aligned magnetic field serves as a coating material to insulate the heat and reduce excessive heating, which is crucial in modern technologies. The primary goal is to magnetize the surface and the developed partial differential equations are converted into nonlinear coupled ordinary differential equations using defined stream functions and similarity variables. Numerical outcomes are obtained using the Keller Box approach and presented in graphs and tables with the help of MATLAB program. Physical features such as skin friction, heat transfer, and magnetic flux affect parameters like thermal-conductivity number, Biot number, and porous number, which in turn affect the velocity profile, magnetic field profile, and temperature profile across the magnetically vertical surface. This thermal and magneto hydrodynamics problem is important in fields such as MRI resonance sequences, artificial heart valves, internal heart cavities, and nanoburning technologies.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Mathematics
Zia Ullah et al.
Summary: By utilizing a magnetic field perpendicular to the surface, it is possible to effectively reduce high temperatures, which is crucial for contemporary technologies. Numerical simulations have been conducted to study the heat convection and amplitude problem of magnetized fluid flow with reduced gravity and thermal stratification. The research has significant implications in domains such as MRI resonant patterns, prosthetic heart valves, interior heart cavities, and nanoburning devices.
Article
Thermodynamics
Muhammad Naveed Khan et al.
Summary: Due to excessive heating, various physical mechanisms are less interested in engineering and modern technologies. To reduce excessive heating, the aligned magnetic field acts like a coating material to insulate the heat which is a very important mechanism in modern technologies. The current magnetohydrodynamics and thermal problem is very important in the fields of MRI resonance sequences, artificial heart wolves, internal heart cavities, and nanoburning technologies. Additionally, the increase in Prandtl Pr leads to a reduction in skin friction and heat transmission, which is physically consistent, due to frictional forces between viscous layers with lesser magnitude.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Baomin Dai et al.
Summary: The concept of dual-temperature condensation and dual-temperature evaporation is proposed for achieving carbon neutrality in industrial heating. Two new high-temperature heat pump systems are developed and optimized, showing better performance than existing heat pumps and traditional boilers in terms of energy consumption, CO2 emissions, and cost. Compared to boilers, high-temperature heat pumps have lower emissions and Ej-DCDE-2 is recommended as a replacement for industrial heating.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Mechanics
Chinu Routa et al.
Summary: In this study, the effect of surface topography, fluid behavior, and rotation on fluid flow and heat transfer over a cylinder was investigated. The impact of surface patterns and fluid behavior were considered using a sinusoidal surface topography and a power-law model. The study aimed to determine the variation of macroscopic parameters such as drag and lift coefficients, average Nusselt number, Prandtl number, rotating speed, and power-law index.
Article
Mechanics
Pankaj Kumar Maurya et al.
Summary: This research investigates the Stokesian flow of an axisymmetric, incompressible couple stress fluid through a porous material enclosing a solid sphere in the presence of a uniform magnetic field. The problem is solved analytically using the separation of variables technique. The obtained expressions involve modified Bessel functions, trigonometric functions, and algebraic functions and provide insight into the drag force experienced by the solid sphere in the porous material under the applied magnetic field.
Article
Mechanics
Junbo Lv et al.
Summary: The natural transition of water boundary layers on heated/cooled flat plates is investigated using numerical methods. The influences of wall temperature, oncoming flow velocity, and oncoming flow temperature on the transition are studied. The results show that the heated wall delays transition and produces a fuller velocity profile and a thinner boundary layer for the laminar flow, while a cooled wall advances transition and causes the opposite effects. The oncoming flow temperature has a strong influence on the non-dimensional transition position.
Article
Mechanics
Xueke Wu et al.
Summary: A laminar boundary layer model is proposed to analyze the velocity and temperature distributions in the mold for unsteady two-dimensional incompressible viscoelastic electrically conducting hydrogel. The magnetic diffusion, thermal radiation, and velocity slip are considered in the model. Numerical and analytical solutions are obtained to study the effects of magnetic parameter and velocity/temperature relaxation time parameters on the fluid velocity and induced magnetic field.
Article
Mechanics
K. Govindarajulu et al.
Summary: This study analyzes the magnetohydrodynamic pulsatile flow of third grade hybrid nanofluid in a porous channel under the impacts of viscous dissipation, thermal radiation, and Ohmic heating. The findings of this research are significant in various fields including food processing, biomedical engineering, and pharmaceuticals. The study investigates the pulsating flow of a third grade hybrid nanofluid with thermal radiation and Joule heating effects, which has not been reported before. The study demonstrates that velocity decreases with a rise in Hartmann number and non-Newtonian parameter, while the temperature of the nanofluid is enhanced with increasing viscous dissipation.
Article
Chemistry, Multidisciplinary
T. Maranna et al.
Summary: The invention of carbon nanotubes has a wide range of industrial and medical applications. This study investigates the flow of mass transfer and magnetohydrodynamics over a stretching plate, obtaining analytical solutions for velocity and temperature fields. The results suggest that MWCNT nanofluids have higher effective velocities than SWCNT nanofluids, which can be beneficial in industrial and medical applications.
APPLIED SCIENCES-BASEL
(2022)
Article
F. Mabood et al.
International Journal of Applied and Computational Mathematics
(2022)
Article
Mathematics, Applied
Qasem Al-Mdallal et al.
Summary: In this study, a Keller box calculation is performed to analyze the flow of magnetic nanopolymer coating over a circular cylinder in the presence of nonlinear convection. The effects of critical thermophysical parameters on the flow field are graphically manifested, and flow control parameters are estimated to evaluate the sheath friction, heat transfer rate, and mass transfer rate in the flow coordinate.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2022)
Article
Mechanics
K. Ilin et al.
Summary: The research aims to investigate the impact of outflow boundary conditions on the stability of incompressible flows in a domain with a permeable boundary. By studying the stability of the Couette flow with radial throughflow between permeable cylinders, the study shows that different outflow boundary conditions can make the corresponding steady flows more unstable.
Article
Energy & Fuels
Khaled Al-Farhany et al.
Summary: The convective heat transfer behavior in an enclosure filled with Cu-water nanofluid with a baffle has been investigated numerically. The results showed that the buoyancy force became more effective, leading to an enhancement of the average Nusselt number. Additionally, the maximum stream function at the core decreased as the baffle inclination angle increased.
Article
Thermodynamics
Zia Ullah et al.
Summary: This study investigates the effects of magnetohydrodynamics and slip velocity on the flow of electrically-conducting fluid over a non-conducting circular cylinder inserted in a porous medium. Numerical solutions are obtained for the fluid velocity, temperature, and magnetic profiles, and oscillating skin-friction, heat transfer, and current-density are analyzed for various dimensionless parameters. The results show that an increase in slip number leads to enhanced fluid velocity and temperature field.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Emad D. Aboud et al.
Article
Thermodynamics
Baomin Dai et al.
ENERGY CONVERSION AND MANAGEMENT
(2019)
Article
Engineering, Multidisciplinary
B. J. Gireesha et al.
AIN SHAMS ENGINEERING JOURNAL
(2018)
Article
Thermodynamics
Prathi V. Kumar et al.
INTERNATIONAL JOURNAL OF HEAT AND TECHNOLOGY
(2017)
Proceedings Paper
Mathematics, Applied
M. A. Ismail et al.
1ST INTERNATIONAL CONFERENCE ON APPLIED & INDUSTRIAL MATHEMATICS AND STATISTICS 2017 (ICOAIMS 2017)
(2017)
Article
Mathematics, Applied
Gilbert Makanda et al.
BOUNDARY VALUE PROBLEMS
(2015)
Article
Nanoscience & Nanotechnology
Tasawar Hayat et al.
Article
Mechanics
Ilyana Anwar et al.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2008)
