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
Mathematics
Sardar Bilal, Imtiaz Ali Shah, Kaouther Ghachem, Abdelkarim Aydi, Lioua Kolsi
Summary: Fluids with high hydrothermal characteristics, known as nanofluids, have been developed by adding dispersed nanoparticles to base fluids. Among these, multi-walled carbon nanotubes (MWCNTs) are considered the best option due to their significant enhancement of thermophysical properties and solution stability. This study analyzes the heat transfer characteristics of MWCNT-water nanofluid in a star-shaped cavity with a hot rectangular baffle. Numerical simulations are conducted using COMSOL and PARADISO software, and the effects of governing parameters on velocity and temperature fields are presented through streamlines and isotherms.
Article
Thermodynamics
Oktay Cicek, Mikhail A. Sheremet, A. Cihat Baytas
Summary: The migration and deposition of MWCNT-Fe3O4 nanocomposite particles in a square enclosure for natural convection hybrid nanofluid flow were analyzed numerically using the Eulerian-Lagrangian model with one-way coupling. The influences of Rayleigh number and nanoparticle volume fraction on the thermal and flow behaviors of the system were presented. The simulations of Lagrangian particle tracking demonstrated that the thermophoresis force played a more significant role in small particle deposition than the Brownian random force.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
Sumant Kumar, B. V. Rathish Kumar, S. V. S. S. N. V. G. Krishna Murthy, Deepika Parmar
Summary: In this numerical study, the convective flow of a hybrid nanofluid in an inverted T-shaped porous media was investigated. The effects of various parameters on the heat and mass transport were studied using a penalty finite element approach. The results showed that increasing the Rayleigh number enhanced the convective heat and mass transfer efficiency.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Computer Science, Information Systems
Zehba A. S. Raizah, Abdelraheem M. Aly
Summary: This study simulated natural convection flow in an H-shaped enclosure filled with a nanofluid using ISPH method. The research found that increasing the length of the heated partitions enhances the velocity field and temperature distributions, while a higher Rayleigh number increases fluid velocity and heat transfer. The presence of a porous layer on the right side causes a high resistance force.
CMC-COMPUTERS MATERIALS & CONTINUA
(2021)
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)
Article
Thermodynamics
Ammar Abdulkadhim, Isam Mejbel Abed, Nejla Mahjoub Said
Summary: This study experimentally investigates the natural convection heat transfer in a three-dimensional I-shaped enclosure with wavy-walled and inner circular pipe. One layer is filled with Al2O3-water nanofluid while the other layer is filled with nanofluid/porous medium. The thermophysical properties of the nanofluid are measured, including thermal conductivity, viscosity, and density. The experimental results show good agreement with the calculated properties based on theoretical models within the studied nanofluid concentrations. Thermocouples are installed to measure the temperature, and magnetic fields are applied to observe the slight increase in temperature. It is also found that increasing the hot side wavy-walled temperature leads to an increase in the temperature difference in the nanofluid-porous region and the nanofluid region.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Multidisciplinary Sciences
Zahir Shah, Anwar Saeed, Imran Khan, Mahmoud M. Selim, Ikramullah, Poom Kumam
Summary: The study investigates the magnetized non-Darcy flow of free convective hybrid nanofluid over a porous cylinder, numerically solved using the control volume finite element method. The results show that increasing medium porosity enhances thermal energy flow, while raising the magnetic field drastically increases the temperature of the inner wall.
Article
Engineering, Multidisciplinary
Arif Ullah Khan, Naeem Ullah, Abdou Al-Zubaidi, Sohail Nadeem
Summary: This article investigates the natural convection nanofluid flow in a hexagon shaped enclosure with a heated cylinder, considering the influence of a porous medium and inclined magnetic field. The finite element method is used to solve the physical model, and the results are presented using contour plots and line graphs to show the effects of flow controlling parameters.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Engineering, Mechanical
Krishno D. Goswami, Anirban Chattopadhyay, Swapan K. Pandit
Summary: This study presents a numerical simulation of steady thermogravitational convection of Cu-Al2O3 water-hybrid magneto-nanofluid in a novel shaped enclosure. The results show that the combination of heater locations and geometry has a significant impact on the transport phenomena, and Cu-Al2O3 hybrid nanoparticles play a crucial role in enhancing heat transfer.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Thermodynamics
Mohamed Dhia Massoudi, Mohamed Bechir Ben Hamida, Mohammed A. Almeshaal, Yahya Ali Rothan, Khalil Hajlaoui
Summary: The study focuses on investigating the magnetohydrodynamic free convection and thermal radiation heat transfer of single walled carbon nanotubes-water nanofluid within T-inverted shaped corrugated cavity. The findings suggest that increasing Rayleigh and Darcy numbers, as well as the radiation parameter, enhance convection heat flow, while increasing corrugation height can also increase convection flow but it decreases with the multiplication of corrugation height. The use of a flat cavity is more efficient than a corrugated one.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2022)
Article
Computer Science, Interdisciplinary Applications
Mohammad Hemmat Esfe, Saeed Esfandeh, Mehdi Bahiraei
Summary: This contribution examines the free convection attributes of a water-based nanofluid containing CuO nanoparticles within a perturbed cavity filled by porous medium using the two-phase mixture model. The results show that the Nusselt number increases with concentration and is greater in the perturbed region. The isotherms become less parallel with increasing Rayleigh numbers due to buoyancy force augmentation. The maximum horizontal velocity increases with the Rayleigh number increment. The Nusselt number decreases significantly with the increase of the Darcy number, but slightly increases after a certain range. More rotational cores are formed in the vicinity of the perturbed side in the cases with the porous medium. Porosity has a more significant effect on the Nusselt number compared to the Rayleigh number and nanoparticle fraction.
ENGINEERING WITH COMPUTERS
(2022)
Article
Engineering, Multidisciplinary
Abed Mourad, Abderrahmane Aissa, Azher M. Abed, Davood Toghraie, Omid Ali Akbari, Kamel Guedri, Obai Younis, Riadh Marzouki
Summary: This work numerically investigates the MHD natural convection and entropy generation characteristics of water-based hybrid nanofluid in a porous annulus. The influence of parameters such as nanoparticle volume fraction, Rayleigh number, Hartman number, Darcy number, and the position of the Koch snowflake on the flow and heat transfer is examined. Applying a Lorentz force affects the flow velocity and facilitates fluid circulation in the cavity.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Imtiaz Ali Shah, S. Bilal, Taseer Muhammad, Sayed M. Eldin
Summary: The prime motive of this case study is to investigate the enhancement in flow and thermal properties of water by adding carbon nanotubes and ferrite particles. A hexagonal enclosure with fillets at boundaries is considered for its physical significance in multiple heat exchange systems. The physical impact of a horizontal magnetic field and the adjustment of a heat circular cylinder are employed. The problem is formulated with necessary assumptions and boundary constraints in a dimensionless format. Thermophysical relations are utilized to explain the behavior of the distributions. Finite Element Method (FEM) is used to solve the modelled problem and the results are presented through snapshots and tables. The comparison of single and muti walled carbon nanotubes shows the rising trend of the velocity field in the hydrodynamic case compared to the hydromagnetic case. The heat transfer rate is found to be higher in the Fe3O4/MWCNT/water hybrid nanofluid. Results and code validation tests are conducted to ensure the credibility of the work.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Sumant Kumar, B. V. Rathish Kumar, S. V. S. S. N. V. G. Krishna Murthy
Summary: This study numerically investigates the influence of Soret and Dufour parameters on the double-diffusive convective flow of a hybrid nanofluid within an inverted T-shaped porous enclosure. The results show that a smaller value of Rayleigh number has little effect on the convective flow, while a higher value reinforces the convective strength. The impact of Darcy number, porosity value, Lewis number, and buoyancy ratio on heat and solute transport activity is significant, while the influence of Soret and Dufour parameters is relatively less.
ASME JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Physics, Multidisciplinary
Sajjad Keykhah, Ehsanolah Assareh, Rahim Moltames, Mohsen Izadi, Hafiz Muhammad Ali
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2020)
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
Morteza Mansouri, Ali Mir, Ali Farmani, Mohsen Izadi
Summary: A tunable, ultra-sensitive and wide-range plasmonic pressure sensor based on nanostructure gratings is proposed in this study, allowing for precise pressure detection by adjusting the coupling state through changes in the metal grating surface. The sensor offers many advantages including nanoscale size, integrability, tunability, low power consumption, low cost, and wide pressure range, showcasing its potential for advanced applications.
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)
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.
