Article
Mechanics
K. Thirumalaisamy, Sivaraj Ramachandran, V. Ramachandra Prasad, O. Anwar Beg, Ho-Hon Leung, Firuz Kamalov, R. Panneer Selvam
Summary: This study analyzes the characteristics of magneto-convective heat transmission and fluid flow within a porous cavity, and finds that increasing the magnetic field strength and nanoparticle volume fraction can improve the heat transfer efficiency.
Article
Thermodynamics
Veerakumar Chinnasamy, Jeonggyun Ham, Honghyun Cho
Summary: This work focuses on the study of the convective heat transfer and pressure drop characteristics of a hybrid nanofluid. Multi-walled carbon nanotube (MWCNT) NF, Fe3O4 NF, and MWCNT/Fe3O4 HNFs with different concentrations were prepared. The convective heat transfer coefficient and pressure drop were investigated and compared. The results showed that the MWCNT/Fe3O4 HNFs exhibited higher heat transfer coefficients and larger pressure drops compared to the base fluid, indicating their potential as an effective heat transport medium.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Mustafa Mutiur Rahman, Ali J. Chamkha, Yasser Elmasry, Ikram Ullah, Amjad Ali Pasha, M. S. Sadeghi, Ahmed M. Galal
Summary: This study investigates the natural convection and entropy generation of a Micro-polar MWCNT-Fe3O4/Water Hybrid Nano-fluid, and reveals that micro-rotation parameter and Hartmann number reduce the heat transfer performance. Furthermore, Be number increases with decreasing Rayleigh number. Additionally, changing the inclination angle and micro-rotation parameter also affect the heat transfer performance.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Areum Lee, Chinnasamy Veerakumar, Honghyun Cho
Summary: This paper discusses the forced convective heat transfer characteristics of water-ethylene glycol (EG)-based Fe3O4 nanofluid and Fe3O4-MWCNT hybrid nanofluid under the effect of a magnetic field. The results indicated that the convective heat transfer coefficient of magnetic nanofluids increased with an increase in the strength of the magnetic field. Enhancement of convective heat transfer was observed with the optimization of nanoparticle dispersion stability and magnetic field strength.
APPLIED SCIENCES-BASEL
(2021)
Article
Thermodynamics
Pawan Karki, Krunal Gangawane
Summary: This study uses MRT-LBM to investigate the heat transfer and entropy generation characteristics in a rectangular enclosure with mixed convection and an external magnetic field. Different factors such as Hartmann number, Richardson number, nanofluid volume fraction, and obstacle location are considered. Three cases are analyzed based on the arrangement of the obstacles. The results show flow velocity reversal at Ha=90 for all Ri and indicate that Case 2 is best suited for Nusselt number enhancement.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Engineering, Multidisciplinary
Xiaobo Li, Guang Fan
Summary: This article numerically studies the magneto hydrodynamic (MHD) mixed convection of titanium oxide/water nanofluids (NFs) in a T-shaped two-dimensional cavity. The results show that an increase in the slip parameter can reduce the entropy generation and slightly decrease the Nusselt number, while both of them increase when the Richardson number reaches a certain range.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Thermodynamics
Yuan Ma, Mohammad Mehdi Rashidi, Rasul Mohebbi, Zhigang Yang
Summary: This study numerically investigates the natural convection heat transfer of hybrid nanofluid (Ag-TiO2/water) in a complex cavity named Shamse knot shape, considering the effects of magnetic field, Rayleigh number, nanoparticle volume fraction, and hollow side length. The results show that the magnetic field has a negative impact on thermal performance, while the nanoparticle volume fraction significantly influences heat transfer efficiency. This research provides insights into the fluid flow and heat transfer characteristics influenced by various parameters in a complex cavity configuration.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2021)
Article
Chemistry, Physical
Yaghoub Mohammadfam, Saeed Zeinali Heris
Summary: This study investigates the impact of single, hybrid, and doped magnetic nanoparticles on the convective heat transfer capabilities of a water/ethylene glycol-based nanofluid under the influence of a magnetic field. The results show that the application of Fe3O4 and Fe3O4@MWCNT nanoparticles can increase the heat transfer capabilities of the nanofluid, while the application of MWCNT-Fe3O4 nanoparticles decreases the heat transfer capabilities. The performance index evaluation indicates that the use of nanofluids is effective, as all samples have a performance index greater than one.
SURFACES AND INTERFACES
(2023)
Article
Energy & Fuels
M. Ziad Saghir, Mohammad M. Rahman
Summary: This article investigates experimentally and numerically the best heat transfer fluid for industrial applications. The results suggest that the 0.2%vol Fe3O4 nanofluid is the most suitable fluid for heat extraction.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Review
Chemistry, Multidisciplinary
Farhan Lafta Rashid, Ahmed Kadhim Hussein, Emad Hasani Malekshah, Aissa Abderrahmane, Kamel Guedri, Obai Younis
Summary: Recent studies have explored various strategies to modify heat-transfer rates in closed cavities, such as adding partitions, fins, or altering forms. Experimental and numerical investigations have shown that fin design can enhance heat transmission and accelerate phase change material melting. Additionally, the optimal wind incidence angle for maximum convective heat loss depends on cavity tilt angle and wind speed.
Article
Thermodynamics
Temiloluwa O. Scott, Daniel R. E. Ewim, Andrew C. Eloka-Eboka
Summary: The use of hybrid nanofluids for convectional heat transfer has shown great potential in improving heat transfer efficiency. This study experimentally investigated the natural convection heat transfer performance of alumina-multiwalled carbon nanotube/water hybrid nanofluids in a square cavity and found that the hybrid nanofluid with a volume concentration of 0.10 vol% exhibited the best heat transfer performance.
EXPERIMENTAL HEAT TRANSFER
(2022)
Article
Chemistry, Physical
Papori Seal, Aszad Alam, C. Borgohain, Nibedita Paul, P. D. Babu, J. P. Borah
Summary: The study aimed to explore the influence of surface modification at nanoscale on the biomedical applicability of multifunctional nanocomposites. Fe3O4 was synthesized and made into nanocomposites with PEG and Amine functionalized MWCNT. Various techniques such as XRD, FTIR, TGA, HRTEM, Rietveld analysis, and VSM were used to confirm the formation of the nanocomposites, characterize the interaction between components, and analyze their magnetic properties. The results showed promising magnetic behaviors and heat generation capabilities of the nanocomposites compared to bare Fe3O4.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Zafar Said, Prabhakar Sharma, L. Syam Sundar, Asif Afzal, Changhe Li
Summary: The study investigated the stability and thermophysical properties of water-based magnetite (Fe3O4) material coated on multiwalled carbon nanotubes hybrid nanofluids. Experimental validation was done using X-ray diffraction, vibrating sample magnetometer, and scanning electron microscopy. Neural network models were built to establish the relationship between input parameters and output properties, showing significant accuracy.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Multidisciplinary Sciences
Wael Al-Kouz, Abderrahmane Aissa, Aimad Koulali, Wasim Jamshed, Hazim Moria, Kottakkaran Sooppy Nisar, Abed Mourad, Abdel-Haleem Abdel-Aty, M. Motawi Khashan, I. S. Yahia
Summary: This study investigates MHD nanoliquid convective flow in an odd-shaped cavity filled with MWCNT-Fe3O4 hybrid nanofluid, analyzing the impact of various parameters on the flow and presenting results in the forms of streamlines, isotherms, and Nusselt number. The influence of multiple parameters on entropy generation rate is discussed under laminar and turbulent flow regimes.
SCIENTIFIC REPORTS
(2021)
Article
Thermodynamics
Sai Ravi Gupta Polasanapalli, Kameswararao Anupindi
Summary: In this study, a characteristic-based off-lattice Boltzmann method was used to investigate mixed convection heat transfer. The effects of rotation strength and direction on flow and heat transfer were analyzed. The results showed that forced convection always resulted in lower heat transfer rates, while natural convection could lead to higher heat transfer rates in certain cases. Different configurations of the cylinders resulted in different heat transfer rates.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Thermodynamics
Yuan Ma, M. M. Rashidi, Rasul Mohebbi, Zhigang Yang
Article
Thermodynamics
Yuan Ma, Mohammad Mehdi Rashidi, Rasul Mohebbi, Zhigang Yang
Summary: This study numerically investigates the natural convection heat transfer of hybrid nanofluid (Ag-TiO2/water) in a complex cavity named Shamse knot shape, considering the effects of magnetic field, Rayleigh number, nanoparticle volume fraction, and hollow side length. The results show that the magnetic field has a negative impact on thermal performance, while the nanoparticle volume fraction significantly influences heat transfer efficiency. This research provides insights into the fluid flow and heat transfer characteristics influenced by various parameters in a complex cavity configuration.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2021)
Article
Physics, Mathematical
Hasan Sajjadi, Amin Amiri Delouei, Rasul Mohebbi, Mohsen Izadi, Sauro Succi
Summary: In this study, a new double multi relaxation time (MRT) Lattice Boltzmann method (LBM) was used to analyze natural convection flow in a porous cavity with sinusoidal temperature distribution. The effects of different Darcy numbers, various Rayleigh numbers, and porosity on the heat transfer rate were studied. The results showed an increase in heat transfer rate with increasing Darcy number, porosity, Rayleigh number, volume fraction of nanoparticles, and phase deviation.
COMMUNICATIONS IN COMPUTATIONAL PHYSICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Rasul Mohebbi, Mohsen Babamir, Mohammad Mahdi Amooei, Yuan Ma
Summary: This paper investigates the natural convection of Ag-MgO/water micropolar hybrid nanofluid in a hollow hot square enclosure with four cold obstacles. The study uses the lattice Boltzmann method (LBM) to simulate the fluid flow and heat transfer performance under different Rayleigh numbers and nanoparticle volume fractions. The results show that the presence of secondary vortices is influenced by the aspect ratio, and the average Nusselt number increases with higher Rayleigh numbers, nanoparticle volume fractions, cold obstacle heights, and aspect ratios.
INTERNATIONAL JOURNAL OF MODERN PHYSICS C
(2022)
Article
Computer Science, Interdisciplinary Applications
Hanif Heidari, Rasul Mohebbi, Amir Kazemi
Summary: This paper numerically investigates the forced convection heat transfer of Ag-MgO/water hybrid micropolar nanofluid in a channel with a smooth top wall and a stairway-shaped bottom. The study shows that increasing the Reynolds number and solid volume fraction, while simultaneously decreasing the stairway aspect ratio, leads to an increase in the average Nusselt number.
INTERNATIONAL JOURNAL OF MODERN PHYSICS C
(2021)
Article
Thermodynamics
Yuan Ma, Rasul Mohebbi, Zhigang Yang, Mikhail Sheremet
Summary: This research numerically analyzes the nanofluid natural convection inside a square enclosure with two L-shaped heaters using the lattice Boltzmann method. The study finds that the CGNP/water nanofluid is an efficient coolant and the Nusselt number increases with nanoparticle concentration and Rayleigh numbers. The flow pattern inside the enclosure is not affected by nanoparticle concentration, but is significantly influenced by Rayleigh number and heaters configuration.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2022)
Article
Physics, Multidisciplinary
Yuan Ma, Rasul Mohebbi
Summary: This study investigates natural convection of nanofluid inside a 2D cavity with different types of cold walls using Buongiorno's two-phase model. The equations are solved using a homemade hybrid Lattice Boltzmann-Finite Difference (LBM-FD) code. It is found that although the nanoparticle concentration is nearly uniform inside the cavity, there are apparent differences around the walls and vortices. The nanoparticles tend to have higher concentrations near the cold wall and lower concentrations adjacent to the hot wall. Additionally, the configuration of the cold walls significantly affects the flow pattern and temperature distribution.
WAVES IN RANDOM AND COMPLEX MEDIA
(2022)
Article
Thermodynamics
Peyman Soleymani, Yuan Ma, Ehsan Saffarifard, Rasul Mohebbi, Meisam Babaie, Nader Karimi, Seyfolah Saedodin
Summary: This paper numerically investigates the forced convection and entropy generation of Fe3O4 water nanofluid inside a cylindrical tube with porous hemisphere media. The effects of different parameters such as Reynolds number, porosity, solid volume fraction of nanofluid, friction factor, and entropy generation are discussed and analyzed. The results show that as the Reynolds number increases, the effect of inertial forces becomes more dominant, adding nanoparticles is more effective in enhancing heat transfer than increasing Hartmann's number, adding a magnetic field increases the friction factor, and adding nanoparticles reduces entropy generation.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Engineering, Multidisciplinary
Yuan Ma, Rasul Mohebbi, Mikhail Sheremet
Summary: This study investigates the liquid motion and energy transfer structures around a starfish-inspired cylinder by numerical simulations. The results show that the circulation patterns and energy transport characteristics are influenced by the tuber length, angle of attack, and Reynolds number.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Computer Science, Interdisciplinary Applications
Rasul Mohebbi, Yuan Ma, Mohamad Hosein Shakeri
Summary: This study investigates the flow pattern and heat transfer characteristics inside an Islamic knot-shaped cavity using numerical simulation. The height and length of the obstacle are varied to analyze their effects. The results reveal that changes in the obstacle's dimensions significantly impact the flow and temperature fields. The small gap inside the cavity has minimal influence on the flow motion, while a small gap between the cold and hot surfaces enhances conduction heat transport. Two distinct flow and heat transfer situations are observed depending on the obstacle dimensions and Reynolds number. The second situation exhibits superior heat transfer performance, especially at higher Reynolds numbers.
INTERNATIONAL JOURNAL OF MODERN PHYSICS C
(2023)
Article
Engineering, Mechanical
H. R. Davarzani, A. Ganjali, H. Sadeghi, R. Mohebbi
Summary: Storage tanks in refinery plants are arranged in group formations and wind is treated as a critical lateral load. This study investigates the impact of tank adjacency on wind pressure fluctuations. Wind tunnel tests were conducted for corrugated-plate tanks of varying rise-to-span ratios, and compared to numerical calculations using computational fluid dynamics. The adjacency effect of tanks in transverse and longitudinal directions were evaluated, and compared to non-adjacency scenarios. Results showed that the adjacency effect was below 10% at distances three and four times the diameter, respectively. Corrugated-plate tanks had smaller negative pressure coefficients compared to simple-plate tanks.
EXPERIMENTAL TECHNIQUES
(2023)
Article
Thermodynamics
Rasul Mohebbi, Yuan Ma
Summary: This research investigates the flow and heat transfer characteristics past three hot obstacles in a sudden expansion and contraction channel. The use of MWCNT-Fe3O4 Water hybrid nanofluid is employed to enhance heat transfer. The study explores the effects of Reynolds number, nanoparticle volume fraction, and different arrangements of discrete heat sources on flow pattern, temperature distribution, and heat transfer. Simulation is conducted using the lattice Boltzmann method.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Thermodynamics
Molka El Maghraoui, Rasul Mohebbi, Mikhail Sheremet, Majdi Hazami
Summary: In this study, the simulation of laminar mixed convection heat transfer in a 2-D inclined channel with conductive fins was conducted using the lattice Boltzmann method (LBM). The effects of inclination angle, geometrical parameters, and Richardson numbers on heat transfer and flow structure were investigated. The numerical model was validated by benchmark problems, and the results were analyzed in terms of isotherms, streamlines, average Nusselt number, and average temperature. The findings showed that the number, height, and width of fins had an impact on the heat transfer rate, and the Richardson number and inclination angle enhanced the average Nusselt number.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Review
Engineering, Chemical
Zahra Hashemi, Abdolmajid Zamanifard, Maysam Gholampour, Jane-Sunn Liaw, Chi-Chuan Wang
Summary: This study comprehensively reviews recent advancements in fill media technology and explores the effects of different fill media configurations and materials on cooling tower performance. Through analysis and evaluation, the effects of various fill media on heat transfer efficiency, water cooling capacity, and energy consumption are summarized. The insights provided in this study can help engineers and designers make rational decisions to optimize cooling tower performance.
Article
Thermodynamics
Monireh Asadi Abchouyeh, Mohammed El Ganaoui, Rasul Mohebbi, Mohammad Reza Zarrabi, Omid Solaymani Fard, Rachid Bennacer
Summary: This study utilized the lattice Boltzmann method to investigate fluid-flow and forced convection heat transfer within a 2-D horizontal channel with and without obstacles. Results showed that adjusting obstacle arrangements can enhance heat transfer, particularly when using hybrid nanofluids. Furthermore, the study highlighted the significant impact of obstacle arrangements and nanofluid types on flow field characteristics and heat transfer within the channel.
