Article
Thermodynamics
Eren Colak, Ozgur Ekici, Hakan F. Oztop
Summary: This study investigates the lid-driven cavity problem under mixed convection conditions using Finite Volume Method (FVM). It is found that the Darcy number can control vortex formation and decrease in Darcy number can drastically increase the average Nusselt number. Heater orientation can be used to control heat transfer effectiveness, vortex shape and size, and can increase the average Nusselt number by 324%. Both heater location and orientation exhibit non-monotonic behavior for different flow parameters.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Engineering, Multidisciplinary
Mohammad Mokaddes Ali, Rowsanara Akhter, Md. Abdul Alim
Summary: The study investigated mixed convection in a nanofluid filled cavity, showing that the variations in length and speed of the rotating flat plate significantly affect flow and thermal fields. Additionally, nanoparticle concentration and magnetic field strength play a role in heat transfer performance.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Engineering, Multidisciplinary
Haiying Zhang, Xiujun Nie, Dmitry Olegovich Bokov, Davood Toghraie, Omid Ali Akbari, Farnaz Montazerifar, Farzad Pourfattah, Yousof Esmaeili, Roohollah Khodaparast
Summary: In this study, laminar mixed convection of water/Ag nanofluid with different volume fractions of nanoparticles was simulated. The results show that adding a higher volume fraction of nanoparticles at lower Richardson numbers enhances heat transfer and Nusselt number. The streamlines in the cavity are influenced by lid-driven motion and fluid viscosity, which contribute to achieving uniform temperature distribution in the cavity.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Apichit Maneengam, Tarek Bouzennada, Aissa Abderrahmane, Kamel Guedri, Wajaree Weera, Obai Younis, Belgacem Bouallegue
Summary: This study investigates the influence of the lid-driven top wall and the waviness of the side walls on the mixed convection heat transfer, flow behavior, and entropy generation of a hybrid nanofluid. The results show that the magnetic force plays a significant role in the thermal and flow behavior of the working fluid, and the undulation number of the wavy side walls has a strong impact on the heat transfer rate and irreversibility.
Article
Thermodynamics
Zakaria Korei, Smail Benissaad, Farid Berrahil, Abdelkader Filali
Summary: In this study, the magneto-convection flow in a cavity driven by the lid was investigated using computational fluid dynamics (CFD) techniques. The numerical findings were validated and it was found that the magnetic field orientation, corners radius, and nanoparticle concentration have significant effects on the flow and heat transfer.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Mathematics, Applied
An-Yang Wang, Hang Xu
Summary: The classic problem of mixed convection flow within an inclined square lid-driven cavity is extended to the case of hybrid nanofluid. The proposed Coiflet wavelet-homotopy method is used to study the governed partial differential equations with non-homogeneous boundary conditions. Highly accurate solutions with clear vortex structures are obtained. The results show that the proposed approach is more effective and accurate in dealing with complicated nonlinear problems compared to the traditional methods. Additionally, the study examines the physical properties of hybrid nanofluid behaviors and finds that they offer better heat transfer enhancement than traditional heat transfer fluids, but are also easier and cheaper.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2022)
Article
Physics, Multidisciplinary
Sameh E. Ahmed, Zehba A. S. Raizah, Hillal M. Elshehabey
Summary: This study examines highly forced convection resulting from the movements of two adjacent wavy and straight walls of two-sided wavy enclosures. The study includes an analysis of the effects of an inclined magnetic force and heat generation sources. The results indicate that forced convection is dominant at higher values of the undulation parameter and lower values of the Hartmann number.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2022)
Article
Multidisciplinary Sciences
Ammar I. Alsabery, Tahar Tayebi, Hakim T. Kadhim, Mohammad Ghalambaz, Ishak Hashim, Ali J. Chamkha
Summary: The study investigates the influence of a two-phase hybrid nanofluid approach on mixed convection characteristics, considering factors such as nanoparticle migration and the presence of solid obstacles. The analysis of non-dimensional parameters using the finite element technique reveals that temperature gradient can lead to significant concentration variations within the enclosure.
JOURNAL OF ADVANCED RESEARCH
(2021)
Article
Physics, Applied
M. Rajarathinam, M. Ijaz Khan, N. Nithyadevi, Mohammed Jameel, Kamel Guedri, Ahmed M. Galal
Summary: In this study, heat transfer enhancement using nanofluid in a porous cavity with a solid block is investigated numerically. The results show that the direction of moving walls plays a crucial role on the heat transfer, with the opposite direction yielding the highest rate. Additionally, the length of the solid block also has a significant influence on the heat transfer.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2022)
Article
Multidisciplinary Sciences
Sattar Aljabair, Ali L. Ekaid, Sahira Hasan Ibrahim, Israa Alesbe
Summary: In this study, mixed convection heat transfer of Cu-water nanofluid in an arc cavity with non-uniform heating was numerically investigated. The results showed that the local and average heat transfer rates increase with increased volume fraction, Reynolds number, or Rayleigh number. Correlation equations of the average Nusselt number from numerical results were also presented.
Article
Chemistry, Multidisciplinary
M. M. Rashidi, M. Sadri, M. A. Sheremet
Summary: This study simulated the energy transference of a hybrid nanosuspension under the influence of a magnetic field, showing that the solid volume fraction of nanoparticles in the hybrid nanofluid has a significant impact on heat transfer efficiency. Proper selection of flow parameters like Richardson number and Hartmann number can enhance the heat transmission rate.
Article
Mathematics
Obai Younis, Sameh E. Ahmed, Aissa Abderrahmane, Abdulaziz Alenazi, Ahmed M. Hassan
Summary: This article presents a numerical investigation of the magnetohydrodynamics of a mixed convection of nanoenhanced phase change material (NEPCM) within a triangular chamber containing an elliptical heat source. Forced convection is induced by the movement of the upper cavity, while free convection is due to the temperature difference between the heat source and inclined sidewalls. The impacts of various parameters on the heat transfer rate are discussed, including the Reynolds number, inclination angle of the heat source, nanoparticles volume fraction, and the movement directions of the upper wall.
Article
Engineering, Aerospace
Ammar I. Alsabery, Mohammad H. Yazdi, Ali S. Abosinnee, Ishak Hashim, Evgeny Solomin
Summary: This study investigates the laminar mixed convection and entropy generation analysis of aluminum oxide nanofluid in a lid-driven wavy cavity. The results show that partial slip is more effective when friction irreversibilities govern the cavity.
PROPULSION AND POWER RESEARCH
(2022)
Article
Thermodynamics
Yang Zhang, Haitao Lin, Rishabh Chaturvedi, Pradeep Kumar Singh, Ibrahim B. Mansir, KePing Zhang, Javid Alhoee
Summary: Using natural phenomena like free convection and modern nanostructures called NEPCM can improve heat transfer in lid-driven problems. This study simulated mixed convection of ethylene glycol and NEPCM in a lid-driven cavity with a rotating cylinder to assess the influence of Grashof number, cylinder speed, and NEPCM concentration on heat transfer characteristics. The results showed that a 6% concentration of NEPCM increased the mean Nusselt number by 41.7%, while the cylinder speed increased it by 38.7%. Additionally, an optimum concentration of 4% was observed for a Grashof number of 104.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Mechanics
Halis Bilgil, Ibrahim Safak, Zafer Ozturk
Summary: This study analyzed the Stokes flow problem in an S-shaped double lid-driven cavity filled with fluid. The flow region was divided into two sub-regions, and the streamfunction in each sub-region was considered as an extension of Papkovich-Faddle eigenfunctions. The effects of the speed ratio of movable lids and the aspect ratio of the cavity on flow structures were shown, and new eddy formation mechanisms and bifurcations were observed in the cavity.
Article
Thermodynamics
Dipak Kumar Mandal, Milan Kumar Mondal, Nirmalendu Biswas, Nirmal K. Manna, Rama Subba Reddy Gorla, Ali J. Chamkha
Summary: This study focuses on the thermo-fluid flow in a partially driven cavity using Cu-water nanoliquid, magnetic field and porous substance. It investigates the thermal characteristics and magnetohydrodynamic convection in a nanoliquid filled porous system. The study reveals that heat transfer is enhanced at higher Richardson numbers with increasing Reynolds value and wall motions significantly influence flow vortices and heat transfer formation.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2022)
Article
Energy & Fuels
Ammar Alsabery, Ahmad Hajjar, Zehba A. S. Raizah, Mohammad Ghalambaz, Ishak Hashim, Ali J. Chamkha
Summary: This study investigates the two-phase flow and heat transfer of a Cu-Al2O3 water hybrid nanofluid in a wavy enclosure partially filled with a porous medium. Numerical simulations show that increasing the Darcy number and nanoparticle concentration have significant impacts on heat transfer enhancement.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Physics, Multidisciplinary
Imene Rahmoune, Saadi Bougoul, Ali J. Chamkha
Summary: This study investigated the natural laminar convection of Al2O3/water nanofluid in a cavity slightly different from shaped H using the monophasic model. The impact of Rayleigh number, nanofluid concentration, and cavity form factor on the dynamic and thermal structure of the flow was analyzed. The study showed that Nusselt number increases with higher Rayleigh number and nanofluid concentration, and decreases with the form factor of the cavity.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2022)
Article
Physics, Multidisciplinary
Milan K. Mondal, Nirmalendu Biswas, Dipak Kumar Mandal, Nirmal K. Manna, Ali J. Chamkha
Summary: This study explores the implementation of a partial magnetic field in a slanting porous cavity and its influence on transport phenomena. The results show that the partial magnetic field has a significant impact on heat transfer mechanisms in the inclined cavity, and adjusting the position and width of the magnetic field can effectively modify the transport phenomena.
WAVES IN RANDOM AND COMPLEX MEDIA
(2022)
Article
Engineering, Mechanical
Kotha Gangadhar, R. Edukondala Nayak, M. Venkata Subba Rao, Ali J. Chamkha
Summary: This paper examines the mechanism of radiative Walter's B nanofluid on a rotational cone under magnetic regime, including the theoretical and practical implications of time-dependent fluid flow caused by cone rotation in engineering and applied sciences, as well as the characteristics of thermophoresis, Brownian motion, and chemical reactions. Self-similar solutions are obtained and the numerical result of a reduced nonlinear system is obtained using the Runge-Kutta-Fehlberg fourth-fifth procedure. Comparisons with previously published material are made to verify the outcome. The conflicting influences of the Brownian motion parameter on heat and mass transfer rates, as well as temperature and concentration fields, are found. The presence of chemical reactions may be more beneficial in developing reaction processes.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2023)
Article
Engineering, Mechanical
K. Gangadhar, M. Venkata Subba Rao, D. Naga Bhargavi, Ali J. Chamkha
Summary: This research focuses on the hydrothermal characteristics of magnetohydrodynamic nanofluid flow over a slippery permeable bended surface. The study reveals that the concentration gradient of nanoparticles is affected by Brownian motion and thermophoretic force. The results also show that increasing magnetic parameter values decrease the velocity field magnitude and pressure in the boundary layer.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2023)
Article
Physics, Multidisciplinary
A. M. Zidan, Tahar Tayebi, A. Sattar Dogonchi, Ali J. Chamkha, Mohamed Bechir Ben Hamida, Ahmed M. Galal
Summary: This article presents a modeling approach to predict thermal natural convection in a porous trapezium-shaped zone with baffles. The study shows that increasing certain parameters can improve convective flow of nanofluid, and the properties of the porous medium have a significant impact on the flow intensity. The research also finds that using nanomaterials to enhance thermal natural convection is economically feasible.
WAVES IN RANDOM AND COMPLEX MEDIA
(2022)
Article
Thermodynamics
Dipak Kumar Mandal, Nirmalendu Biswas, Nirmal K. Manna, Rama Subba Reddy Gorla, Ali J. Chamkha
Summary: This study numerically examines the influence of various geometric parameters on the thermal performance of a novel W-shaped porous cavity undergoing hybrid nanofluid-based magnetohydrodynamic mixed convection. The results show that an increase in the bottom undulation height improves the thermal energy transfer despite the reduction of fluid volume. The overall thermal energy transport is improved by increasing Reynolds number, Richardson number, and Darcy number, while it is suppressed by increasing Hartmann number.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2023)
Article
Engineering, Mechanical
Bhupendra Kumar Sharma, Umesh Khanduri, Nidhish K. Mishra, Ali J. Chamkha
Summary: This study numerically investigates the combined effects of Arrhenius activation and microorganisms on unsteady flow through a porous medium with thermophoresis and Brownian motion. The results have important implications for geothermal engineering, energy conversion, disposal of nuclear waste material, as well as applications in medical fields such as gene therapy and drug delivery systems.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2023)
Article
Physics, Multidisciplinary
Pramod Kumar Yadav, Ankit Kumar, Shreen El-Sapa, Ali J. Chamkha
Summary: This work analyzes the impact of oriented magnetic fields and thermal radiation on the entropy generation of two non-miscible electrically conducting micropolar and Newtonian fluids in a horizontal rectangular porous channel. Expressions for heat transformation, fluid flow velocity, Bejan number distribution, and entropy production characteristics are obtained with the help of a reliable method. The impact of various emerging parameters on the entropy optimization, Bejan number, heat transformation, and flow velocity is analyzed, and the findings are validated by the previously established results.
WAVES IN RANDOM AND COMPLEX MEDIA
(2022)
Article
Thermodynamics
Hussan Zeb, Hafiz A. Wahab, Umar Khan, Ali J. Chamkha
Summary: This study analyzed the characteristics of heat transfer in non-Newtonian ferrofluids produced by stretchable sheet and investigated the effects of Arrhenius activation energy and magnetic dipole. By applying a similarity ansatz and Runge-Kutta method, the computational solution for the governing system was determined. The influence of beneficial physical parameters on momentum, energy, and concentration profiles was shown through graphs.
Article
Thermodynamics
Shreedevi Kalyan, Ashwini Sharan, Ali J. Chamkha
Summary: This article examines the effect of heat and mass transfer flow of two immiscible Jeffrey fluids in a vertical channel. The impact of different physical parameters on the flow and distribution of velocity, temperature, and concentration is illustrated graphically.
Article
Thermodynamics
Alexander Nee, Bubryur Kim, Ali J. Chamkha
Summary: The present study focuses on the numerical analysis of heat transfer and fluid flow patterns in a three-dimensional problem formulation. A hybrid mathematical model is built, and the equations are solved using MATLAB. The results show that the emissivity of the vertical walls can be used as a tool to control thermal and flow behavior.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
Alexander Nee, Ali J. Chamkha
Summary: This paper investigates the capability of hybrid lattice Boltzmann method in simulating developed turbulent buoyancy-driven flows. The numerical simulation shows that the hybrid approach accurately predicts the location of thermal plumes, despite a small error in heat transfer rate at high Rayleigh numbers.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
L. Syam Sundar, Solomon Mesfin, E. Venkata Raman, V. Punnaiah, Ali J. Chamkha, Antonio C. M. Sousa
Summary: The study demonstrates that using hybrid nanofluids with coiled wire inserts in a tube can significantly enhance heat transfer performance and reduce thermal entropy generation, thereby increasing the exergy efficiency of water flow.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Engineering, Chemical
Yongxiang Wu, Nguyen Thi Hong Nhung, Deqian Zeng, Nengneng Luo, Akira Otsuki, Gjergj Dodbiba, Toyohisa Fujita
Summary: This study proposed a novel method for synthesizing flower-like vaterite calcium carbonate using nanobubble-containing ethanol and water mixed solution as the solvent and discussed the formation mechanism of vaterite with different shapes. The synthesized vaterite has significant practical interest in the integrated treatment of wastewater contaminated by heavy metals with effective Cd(II) removal, providing a promising field for studying heavy metal and pollutant adsorption in the liquid phase.
ADVANCED POWDER TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jian Gong, Lipo Cheng, Ming Liu, Jie Jiang, Xiaoduo Ou
Summary: This study investigates the effects of particle shape on the collapse of granular columns using the discrete element method. The results show that particle shape has a significant impact on deposition morphology, energy evolution, and mechanical coordination number. Sphericity and angularity are identified as the most important macroscale factors, while roughness has a weaker microscale influence.
ADVANCED POWDER TECHNOLOGY
(2024)
