Article
Physics, Applied
Michal Rajnak, Marek Franko, Katarina Paulovicova, Maksym Karpets, Kinnari Parekh, Ramesh Upadhyay, Juraj Kurimsky, Bystrik Dolnik, Roman Cimbala, Peter Havran, Milan Timko, Peter Kopcansky
Summary: This paper investigates the effect of different insulating oils on the temperature rise of a power transformer. The results show that low-concentration ferrofluids can significantly reduce the temperature rise, while high-concentration ferrofluids lead to a remarkable increase in temperature rise. This phenomenon is attributed to the enhanced heat conductivity and convection ability of low-concentration ferrofluids, and the hindered convection due to the high magnetization and magnetic interaction of high-concentration ferrofluids with the magnetic field.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Mechanics
Anupam Bhandari, K. P. S. Parmar
Summary: This study investigates the three-dimensional problem of steady ferrofluid deposition on an inclined rotating surface in the presence of a magnetic dipole. A finite element procedure is used to solve normalized ordinary differential equations derived from momentum and energy equations. The current numerical model and its solution is compared and validated against previous numerical results. The velocity and temperature field variations are a representation of the effects of magnetic field-based viscosity, magnetic polarization force, Curie temperature, and Prandtl number.
Article
Thermodynamics
Nirmalendu Biswas, Dipak Kumar Mandal, Nirmal K. Manna, Rama Subba Reddy Gorla, Ali J. Chamkha
Summary: The study investigates thermal phenomena during MHD free convection in an oblique enclosure filled with a Cu-Al2O3/water hybrid nanofluid. Results show that increasing heating surface area does not always improve heat transfer, while increasing undulation amplitude can enhance heat transfer up to a certain optimal value. Heat transfer enhancement is influenced by the wall curvature at higher Ra-m, lower Da and Ha, and lower volume fraction of nanoparticles.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2022)
Article
Engineering, Multidisciplinary
Iskander Tlili, S. P. Samrat, N. Sandeep, Hossam A. Nabwey
Summary: A computational framework was used to study the drive and thermal transport of unstable MHD Oldroyd-B ferrofluid flow with CoFe2O4 nanoparticles in water. Results showed that spherical ferrous particles have higher energy transport efficiency compared to tube and laminar shaped particles, and the Nusselt number can be regulated by the Deborah number and unsteadiness parameter.
AIN SHAMS ENGINEERING JOURNAL
(2021)
Article
Engineering, Multidisciplinary
Babar Iftikhar, Muhammad Arshad Siddiqui, Tariq Javed
Summary: The study investigates the influence of a non-uniform magnetic field on heat transfer and entropy generation in the convection flow of ferrofluid. The governing equations are transformed into algebraic equations and solved using the Newton-Raphson method. Results show that increasing the magnetic number decreases fluid velocity and entropy generation. The intensity of streamlines decreases and velocity and temperature profiles increase with an increase in ferroparticle concentration.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Najiyah Safwa Khashi'ie, Iskandar Waini, Nurul Amira Zainal, Khairum Bin Hamzah, Abdul Rahman Mohd Kasim, Norihan Md Arifin, Ioan Pop
Summary: This paper examines the unsteady separated stagnation point flow and thermal progress of Fe3O4-CoFe2O4/H2O on a moving plate, and finds that the magnetic and acceleration parameters enhance skin friction and heat transfer coefficients. However, increasing the heat generation parameter leads to a reduction in the thermal rate distribution, indicating the greater effectiveness of heat absorption compared to heat generation in the thermal flow process.
Article
Mathematics, Applied
Amjid Rashid, Abdullah Dawar, Muhammad Ayaz, Saeed Islam, Ahmed M. Galal, Humaira Gul
Summary: This study investigates the flow characteristics of a water-based hybrid nanofluid consisting of silver and alumina nanoparticles past a spinning disk. The effects of Brownian motion, activation energy, magnetic field, and thermophoresis are taken into account. The partial differential equations (PDEs) are transformed into ordinary differential equations (ODEs) through suitable correspondence transformations. The modeled equations are solved using a semi-analytical method known as HAM. Graphical representations of the nanofluid and hybrid nanofluid profiles are used. The findings show a decrease in the radial and tangential velocities of the nanofluids and hybrid nanofluid with an increase in the magnetic factor. The hybrid nanofluid exhibits higher growth and better thermal conductivity than the nanofluids due to the magnetic factor.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2023)
Article
Chemistry, Physical
Wen-Na Bao, Adel Almarashi, Hai-Feng Pan, Yong-Qiang Du, Alibek Issakhov, Xuan Vuong Bui, Shao-Wen Yao, Anh Tien Nguyen
Summary: The behavior of hybrid nanofluid in the presence of MHD impact was studied, with results showing that reducing the strength of the magnetic field leads to a decrease in the Bejan number, while increasing the Hartmann number increases exergy destruction and causes the thermal plume to disappear. Increasing permeability results in higher nanomaterial velocity and reduced entropy generation. Additionally, increasing the Darcy and Rayleigh numbers leads to an increase in Nu, a decrease in Be and Xd, and a rise in temperature.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Mathematics, Applied
P. M. Bhavana, G. P. Vanitha, U. S. Mahabaleshwar, Basma Souayeh
Summary: In this study, the MHD Casson fluid flow on a stretching/shrinking surface with mass suction/injection is investigated. The boundary problem is transformed from highly partial differential equations to ordinary differential equations using similarity variables. Analytical explanations are provided for the resulting ordinary differential equations by considering different controlling parameters and corresponding boundary conditions. The outcomes of the investigation, which can be analyzed using graphical form, reveal the behavior of transverse velocity and tangential velocity under different scenarios and parameter values.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2023)
Article
Mathematics
Iskandar Waini, Najiyah Safwa Khashi'ie, Abdul Rahman Mohd Kasim, Nurul Amira Zainal, Khairum Bin Hamzah, Norihan Md Arifin, Ioan Pop
Summary: This study discusses the impact of unsteady magnetohydrodynamics hybrid ferrofluid flow over a stretching/shrinking rotating disc. By transforming the mathematical model into ordinary differential equations and analyzing the solutions, it is found that both solutions are stable. The research also reveals that the unsteadiness parameter decreases the boundary layer thickness of velocity and temperature distribution, while the magnetic and mass flux parameters have a lowering effect on the skin friction coefficient and the unsteadiness parameter has a supportive effect on the heat transfer rate.
Article
Mathematics, Applied
Hossam A. Nabwey, Vasudeva Reddy Minnam Reddy, M. Govindaraju, N. Sandeep
Summary: This study numerically investigates heat diffusion in the cylindrical film flow of third-grade ferroliquid using the nanolayer concept to analyze effective thermal conductivity of ferrofluid with different nanoparticle shapes. An exact model is developed and solved using the bvp5c Matlab scheme, incorporating hydrodynamics, Darcy-Forchheimer, Ohmic heating, and nonlinear radiation effects. Computational outcomes are presented through pictorial and tabular results, showing that cylindrical nanoparticles have superior heat relocation compared to spherical nanoparticles, demonstrating the effectiveness of the nanolayer formed by cylindrical nanoparticles in enhancing the base liquid thermal conductivity. Therefore, suspending Co-cylindrical nanoparticles with third-grade rheological behavior in the base liquid can significantly increase the PTSC heat spread rate.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2023)
Article
Nanoscience & Nanotechnology
K. Ajith, Mallolu Jesse Aaron, Archana Sumohan Pillai, I. V. Muthuvijayan Enoch, A. Brusly Solomon, M. Sharifpur, J. P. Meyer
Summary: This investigation focuses on the influence of a magnetic field on the thermophysical properties and heat transfer of low-density ferrofluid. The optimal volume fraction of 0.05% was found to have the highest heat transfer performance at a wall temperature difference of 25 degrees C, with significant improvements compared to water.
APPLIED NANOSCIENCE
(2022)
Article
Microbiology
Jacqueline L. Gill, Jessica Hedge, Daniel J. Wilson, R. Craig MacLean
Summary: Our research shows that the MRSA strain Staphylococcus aureus ST239 originated from a large-scale recombination between ST8 and ST30 before 1945. Despite being primarily influenced by purifying selection, ST239 has undergone parallel evolution in genes related to antibiotic resistance and virulence. However, ST239 exhibits lower competitive fitness compared to other strains of S. aureus, which may explain its rapid decline in prevalence worldwide.
Article
Thermodynamics
Guolong Li, Jin Wang, Hongxing Zheng, Gongnan Xie, Bengt Sunden
Summary: This study investigates the convective heat transfer enhancement of Fe3O4-water nanofluid by introducing carbon nanotubes and applying a magnetic field. The results show significant improvement in heat transfer performance by adding carbon nanotubes to the nanofluid and subjecting it to a magnetic field under certain experimental conditions.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Engineering, Multidisciplinary
M. Vijatha, P. B. A. Reddy
Summary: The proposed model investigates the entropy generation, heat transport, and flow characteristics of Ag-TiO2/blood flow in a Darcy-Forchheimer stretching cylinder under the impact of Cattaneo-Christov heat flux and thermal radiation. The study uses mathematical methods and simulations to analyze the effects of various factors on velocity, temperature, and entropy production.
Article
Engineering, Mechanical
Vasudeva Reddy Minnam Reddy, A. Sreevallabha Reddy, R. Suresh Babu, N. Sandeep
Summary: This study explores the impact of nanospray on the film flow of Casson and Sutterby nanofluids over a cylindrical surface. The findings suggest that the heat transmission rate of the Casson nanoliquid is higher than the Sutterby nanoliquid, indicating its potential value in heat transfer applications.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2023)
Article
Engineering, Mechanical
Hossam A. Nabwey, M. Girinath Reddy, B. K. Naveen Kumar, N. Sandeep
Summary: This study investigates the method of hydrogen energy storage by improving the heat transfer performance of PTSC. The study finds that thermal radiation with the combination of Oldroyd-B fluid can enhance the heat transmission rate of PTSC to a new level.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2023)
Article
Physics, Multidisciplinary
M. Girinath Reddy, N. Sandeep
Summary: This study investigates hydrogen energy storage by enhancing the heat transmission efficiency of the Parabolic Trough Solar Collector (PTSC) in the presence of radiative heat, Lorentz force, and uneven heat source/sink. The research concludes that fluids with Casson rheological behavior are helpful in achieving effective heat transmission.
WAVES IN RANDOM AND COMPLEX MEDIA
(2022)
Article
Engineering, Mechanical
Jeevankumar, N. Sandeep
Summary: A numerical analysis was conducted to study the thermal transmission in the cylindrical film flow of Casson-Williamson hybrid nano liquids. The effects of a magnetic field, Ohmic heating, thermal radiation, and thermal flux were considered. The study found that the heat spread rate of Casson hybrid nano liquid was higher than that of Williamson hybrid nano liquid.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2022)
Article
Engineering, Mechanical
Niraj Rathore, N. Sandeep
Summary: Nanotechnology has great potential in biomedical applications, such as drug delivery, medical imaging, and tumor treatment. Graphene oxide and aluminium oxide nanoparticles show excellent properties in nano-drug delivery and cancer treatment. This theoretical study examines the heat transfer in blood flow through a stenotic artery using GO-Al2O3 nanoparticles. The results show that the Oldroyd-B model has better heat transmission rate and lower drug resistance compared to the Maxwell model.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2023)
Article
Physics, Multidisciplinary
Om Prakash, N. Sandeep, Ram Prakash Sharma, Pentyala Srinivasa Rao
Summary: This study investigates the impact of radiative heat transfer on unsteady hydromagnetic dusty nanofluid flow. The flow characteristics and heat transfer performance of water-based nanofluid with copper and silicon nanoparticles are modeled and analyzed. The results show that the heat transfer performance of silicon-water nanoliquid is better than copper-water nanoliquid.
WAVES IN RANDOM AND COMPLEX MEDIA
(2022)
Article
Thermodynamics
A. C. Venkata Ramudu, K. Anantha Kumar, V Sugunamma
Summary: This study aims to explore the impact of viscous dissipation stimulus on the steady convective magnetohydrodynamic shear thickening liquid stream across a vertically stretched sheet. The findings indicate that the velocity decreases and the temperature distribution increases when the Casson fluid parameter increases.
Article
Thermodynamics
P. Nanda, N. Sandeep, C. Sulochana, G. P. Ashwinkumar
Summary: The present article investigates the effects of radiative heat flux and Joule heating on the 3D magneto-flow of tangent hyperbolic mixed nanoliquid above a linear/nonlinear expandable surface. A hybrid nanofluid is prepared by suspending aluminum alloy nanoparticles AA7072 and AA7075 in methanol liquid. Nonlinear partial differential equations are transformed into ordinary differential equations using appropriate similarity conversions, and their solutions are obtained using the bvp5c MATLAB package. The study provides simultaneous results of radiative hydrodynamic flow under linear and nonlinear extending surface conditions, and the influence of various factors on the flow characteristics is demonstrated through plots. The thermal transport rate is found to be twice as high in the nonlinear extending case compared to the linear stretching case, with the presence of unique nanoparticles significantly enhancing the thermal transport mechanism of the non-Newtonian liquid.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Thermodynamics
Niraj Rathore, N. Sandeep
Summary: The application of silver and gold nanoparticles in antimicrobial and anticancer therapies is explored, and it is found that gold nanoparticles can effectively convert photons to heat to destroy cancer cells. The radiative heat distribution and heat transfer characteristics of blood-based Ag-Au hybrid nanofluid are investigated through experiments and numerical simulations.
NUMERICAL HEAT TRANSFER PART B-FUNDAMENTALS
(2023)
Article
Engineering, Mechanical
N. Sandeep, P. Nanda, G. P. Ashwinkumar
Summary: Numerical computations were used to investigate the effect of the Buongiorno slip mechanism and radiative heat on gyrotactic microorganisms in a nanofluid flow. The results show that the deposition of nanomaterials significantly affects the flow and heat transfer, particularly in the suction case.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2023)
Article
Thermodynamics
Hossam A. A. Nabwey, Vasudeva Reddy Minnam Reddy, R. Suresh Babu, N. Sandeep
Summary: Solar power is important for meeting energy needs in industry and households. The practical use of solar power is examined by improving the heat diffusion rate of conventional liquid. A hypothetical analysis is conducted for third-grade cylindrical film flow with consideration of MHD, radiation, Ohmic heating, and Cattaneo-Christov heat flux. Water is used as the base liquid with graphene oxide nanoparticles. An exact model is established and solved computationally through suitable comparisons. The use of a parabolic trough solar collector is directly incorporated in the flow model. Comparative analysis is performed on Xue and Maxwell nanomodels, highlighting the enhancement of nanofluid temperature and heat transmission rate.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Thermodynamics
Ashwinkumar G. Poojari, B. Ranjana, N. Sandeep, C. Sulochana
Summary: A computational analysis is performed to investigate the effect of magnetized force and radiative flux on the unsteady magnetofluid flow of ZnO + H2O nanoliquid on a variable thickness surface with convective edge constraints. The study aims to compare the thermal transfer performance of the Maxwell and Xue nanomodels. The results indicate that both the radiative flux and thermal Biot number significantly increase the Nusselt number, and the energy transport rate is 4% higher in the Maxwell nanomodel compared to the Xue nanomodel.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Thermodynamics
Jeevan Kumar, N. Sandeep
Summary: A numerical analysis is conducted to investigate the heat transport of the Sutterby hybrid nanofluid flow between two concentric cylinders. The research reveals that the thermal transmission rate of the hybrid nanofluid is superior to the base liquid. The flow and heat regions can be controlled by the drag force of the magnetic field.
NUMERICAL HEAT TRANSFER PART B-FUNDAMENTALS
(2023)
Article
Engineering, Mechanical
Niraj Rathore, N. Sandeep
Summary: The biomedical applications and antibacterial properties of graphene oxide (GO) nanoparticles help to treat tumors and improve drug delivery results. The addition of GO nanoparticles in blood flow enhances thermal performance, and it leads to changes in energy transmission during the process of blood passing through stenosis artery.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2023)
Article
Engineering, Mechanical
N. Jeevankumar, N. Sandeep
Summary: In this study, the heat diffusion in the cylindrical film stream of the second-grade cross nanofluid is examined numerically. Solid nanoparticles of AA7072 and AA7075 are submerged in water as the base liquid. The results show that the thermal diffusion rate of the AA7072-AA7075-water combination is more remarkable than the base liquid.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2023)
