Article
Multidisciplinary Sciences
Wael Al-Kouz, Bilal Abdel-Illah Bendrer, Abderrahmane Aissa, Ahmad Almuhtady, Wasim Jamshed, Kottakkaran Sooppy Nisar, Abed Mourad, Nawal A. Alshehri, Mohammed Zakarya
Summary: In this study, the finite element method was used to simulate heat transfer and irreversibilities in a mixed convection two-phase flow through a wavy enclosure filled with water-alumina nanoliquid containing a rotating solid cylinder in the presence of a uniform magnetic field. The results showed that increasing the Rayleigh number enhanced the maximum value of the flow function and the heat transfer process, while increasing the waviness of the active surfaces or the rotational velocity of the cylinder or the Hartmann number suppressed fluid motion and hindered heat transfer.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Multidisciplinary
Nepal Chandra Roy
Summary: This study investigates the natural convective flow and heat transfer of a hybrid nanofluid in an enclosure with multiple heat sources at the bottom wall, under the influence of a magnetic field applied at an angle with the horizontal axis. The results reveal that the flow pattern and heat transfer characteristics are significantly influenced by the magnetic field parameter, angle of magnetic field, number and breadth of heat sources, and Rayleigh number. Higher Rayleigh numbers and smaller magnetic field parameters result in stronger stream function intensity. Moreover, the volume fraction of Cu nanoparticles affects the streamlines and isotherms, showing distinct patterns. The average Nusselt number increases with the increase of heat sources, magnetic field angle, and Rayleigh number.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Multidisciplinary Sciences
Fares Redouane, Wasim Jamshed, S. Suriya Uma Devi, Belhadj M. Amine, Rabia Safdar, Khaled Al-Farhany, Mohamed R. Eid, Kottakkaran Sooppy Nisar, Abdel-Haleem Abdel-Aty, I. S. Yahia
Summary: This article discusses the natural convection heat transfer of Ag/Al2O3-water hybrid in an enclosure with a rotating cylinder and an inner undulated porous layer under a uniform magnetic field. Various thermo-physical parameters are investigated, showing that an increase in Rayleigh number and Darcy number enhances heat transfer convection within the enclosure, while porosity has minimal impact. Rotation speed in a positive direction also has a favorable influence on heat transfer dispersion across the cavity.
SCIENTIFIC REPORTS
(2021)
Article
Thermodynamics
Mahalakshmi Thangavelu, Nithyadevi Nagarajan, Ruey-Jen Yang
Summary: A numerical investigation was conducted on the magneto-convection heat transfer performance of Ag-based nanofluid in a square enclosure, with findings suggesting that the heat transfer performance improves with increasing lengths of the central heater and lower heated wall section. The average Nusselt number increases with a vertical orientation of the central heater, but decreases with increasing magnetic field strength. Additionally, increasing Ag nanoparticle volume fraction leads to an improvement in heat transfer performance at high Rayleigh numbers.
HEAT TRANSFER ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Hameed K. Hamzah, Farooq H. Ali, M. Hatami, D. Jing, Mohammed Y. Jabbar
Summary: Numerical Galerkin Finite Element Method (GFEM) was used to study the conjugate heat-transfer of a rotating cylinder in Fe3O4-water nanofluid, showing significant effects of parameters such as nanoparticles volume fraction and Hartmann numbers on the heat transfer performance.
SCIENTIFIC REPORTS
(2021)
Article
Thermodynamics
Wasim Jamshed
Summary: This study explores the behavior of a hybrid nanofluid based on the mixture of magnesium oxide and silver in a permeable and hollow ampoule, using magnetic effects and thermos-physical models. The twisting ampoule structure was found to have a significant impact on fluidity and heat diffusion, as observed in the developed contours of streamlines.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Mathematics
Khalid B. B. Saleem, Mohamed Omri, Walid Aich, Badr M. M. Alshammari, Hatem Rmili, Lioua Kolsi
Summary: This paper focuses on the effect of a rotating magnetic field on natural convective flow of CNT/Water nanofluid in a corrugated square cavity with differential heating on its sidewalls and perfectly insulated upper and lower boundaries. The study aims to highlight the impact of various parameters, such as Hartman number, frequency of rotation, Rayleigh number, nanoparticles volume fraction, and corrugation aspect ratio, on flow behavior and thermal transport characteristics. The governing equations are solved using the finite element technique. Results show that thermal energy exchange is improved with increasing Rayleigh number and nanoparticles loading, while it is weakened with higher Ha due to Lorentz force opposing buoyancy. Increasing corrugation aspect ratio leads to stagnant fluid zones and a reduction in heat transfer rate.
Article
Multidisciplinary Sciences
Umar Farooq, Hassan Waqas, Nahid Fatima, Muhammad Imran, Sobia Noreen, Abdul Bariq, Ali Akgul, Ahmed M. Galal
Summary: The dominant characteristics of hybrid nanofluids, such as rapid heat transfer rates, superior electrical and thermal conductivity, and low cost, have attracted the interest of researchers worldwide. This study investigates the effects of a silver and cobalt ferrite-based hybrid nanofluid with MHD between a rotating disk and a cone. By utilizing similarity transformations, the set of partial differential equations is transformed into a set of ordinary differential equations. The volume proportion of nanoparticles and the temperature distribution profile are found to increase, making this hybrid nanofluid more efficient for metallurgical, medicinal, and electrical applications. Additionally, the antibacterial properties of silver nanoparticles can be utilized for bacteria growth inhibition.
SCIENTIFIC REPORTS
(2023)
Article
Thermodynamics
Amin Kardgar
Summary: The study investigated conjugate heat transfer of natural convection and entropy generation of nanofluid in an inclined square cavity enclosure with an external magnetic field. The findings showed that increasing nanoparticle volume fraction, inclination angle, Ra number, and solid to fluid conductivity ratio could lead to different effects on heat transfer and entropy generation in the system. The study provides valuable insights into the behavior of nanofluid flow and heat transfer in the presence of an external magnetic field.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2021)
Article
Thermodynamics
Laith M. Jasim, Hudhaifa Hamzah, Cetin Canpolat, Besir Sahin
Summary: This study presents a numerical solution for the influence of an inner rotating adiabatic cylinder on mixed convection of hybrid nanofluid inside a vented cavity. The study explores the effects of various parameters on energy transport and presents the results through qualitative and quantitative figures.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Aissa Abderrahmane, Wasim Jamshed, Azher M. Abed, Ghassan Fadhil Smaisim, Kamel Guedri, S. Suriya Uma Devi, Omid Ali Akbari, Obai Younis, Shaghayegh Baghaei
Summary: This investigation analyzes the heat transport phenomena of non-Newtonian nanofluid in an annulus enclosure and finds that the composition of the nanofluid can enhance heat transfer. By manipulating parameters such as Rayleigh and Darcy numbers, power-law index, and magnetic forces, the heat transfer performance can be improved.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Shantanu Dutta, Sukumar Pati, Laszlo Baranyi
Summary: The study shows that the average Nusselt number increases with the volume fraction of nanoparticles and decreases with the Hartmann number. In addition to the influence of fluid properties and external conditions, the geometric variation of the enclosure volume also plays a role in altering the heat transfer rate.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Chenqi Fu, Amin Rahmani, Wanich Suksatan, S. M. Alizadeh, Majid Zarringhalam, Supat Chupradit, Davood Toghraie
Summary: Nanofluid mixed convection in a square cavity with an adiabatic obstacle was investigated using the Lattice Boltzmann method. Different parameters were found to have significant impacts on heat transfer in the enclosure.
SCIENTIFIC REPORTS
(2021)
Article
Thermodynamics
Sangram Kumar Samal, Manoj Kumar Moharana
Summary: This study numerically investigates the thermo-hydraulic and entropy generation characteristics of water-based graphene-silver hybrid nanofluid in a recharging microchannel. The results show that using the hybrid nanofluid enhances heat transfer performance but also increases pressure drop and pumping power requirements.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Oktay Cicek, A. Filiz Baytas, A. Cihat Baytas
Summary: This study numerically analyzes the mixed convection and entropy generation in an annulus with a rotating heated inner cylinder for SWCNT-water nanofluid flow using the LTNE model. The findings indicate that buoyancy force and rotational effect significantly impact the strength of streamlines and isotherms. The addition of nanoparticles to the fluid decreases the minimum total entropy generation, suggesting a significant role for nanofluids in thermal design and heat transfer optimization.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2021)
