Article
Mechanics
Sapna Jain, Surabhi Nishad, Rama Bhargava
Summary: This paper investigates the effect of double diffusion natural convection fluid flow inside a double wavy enclosure using the mesh-free method. The results show that the mass and heat transfer rates increase with an increase in the Rayleigh number and buoyancy ratio, while they decrease with an increase in the thermophoresis parameter, Lewis number, Brownian motion, and power-law index. Such enclosures have applications in heat exchanger devices, double-wall thermal insulation systems, and microelectronic devices.
Article
Thermodynamics
Fatin M. Azizul, Ammar Alsabery, Ishak Hashim, Ali J. Chamkha
Summary: The study analyzes the heatline visualization of mixed convection mechanism and heat transfer in a double lid-driven square cavity with a heated wavy bottom surface. Various factors such as Reynolds number, Richardson number, Prandtl number, and number of oscillations significantly influence the convection mode. The number of oscillations has the most significant impact on streamlines and temperature distributions, while higher Reynolds and Prandtl numbers lead to increased heat transfer efficiency.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Masih Shekaramiz, Shadi Fathi, Hamid Ataei Ataabadi, Hamed Kazemi-Varnamkhasti, Davood Toghraie
Summary: This study applied Buongiorno's model to solve the two-phase modeling problem in a triangular chamber with hot wavy walls containing iron oxide nanoparticles. The heat transfer rate is significantly affected by the undulation number. The Nusselt number is inversely related to the Rayleigh number, while the heat transfer rate is inversely related to total entropy generation.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
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
Multidisciplinary Sciences
Navid Alipour, Bahram Jafari, Kh. Hosseinzadeh
Summary: To address the challenge of thermal performance and heat loss in energy conversion systems, this study simulated a trapezoidal cavity with a wavy top wall containing water/ethylene glycol GO-Al2O3 nanofluid using the Galerkin finite element method. The effects of physical parameters, such as porosity, thermal radiation, magnetic field angle, Rayleigh number, and Hartmann number, on thermal performance and fluid flow were investigated. The optimized values for these parameters were determined to be 1214.46, 2.86, 0.63, 0.24, and 59.35, respectively. By applying RSM and Taguchi integration, the highest average Nusselt number of 3.07 was achieved, indicating improved thermal performance.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Aiman Alshare, Aissa Abderrahmane, Kamel Guedri, Obai Younis, Muhammed Fayz-Al-Asad, Hafiz Muhammed Ali, Wael Al-Kouz
Summary: This study investigates mixed convection in a lid-driven cavity and considers the effects of various parameters. The simulations show that heat transfer plays a major role in entropy generation, while the effects of friction and magnetic fields are minimal.
Article
Thermodynamics
Xiaobin Jiang, Mohammad Hatami, Aissa Abderrahmane, Obai Younis, Basim M. Makhdoum, Kamel Guedri
Summary: This study simulates the three-dimensional flow of Fe3O4/MWCNT-water hybrid nanofluid in a 3D cubic enclosure filled with a porous medium. The effects of various flow parameters and the presence of rotating cylinders and a wavy wall are investigated. The results show that higher angular speed of the cylinders and lower Hartmann number enhance heat transfer and Nusselt number, while entropy production is mainly due to heat transfer but is also influenced by fluid-friction and magneto effects.
APPLIED THERMAL ENGINEERING
(2023)
Article
Mathematics, Applied
Nepal Chandra Roy, Sherajum Monira
Summary: In this study, the natural convection of a chemically reacting hybrid nanofluid in a closed wavy-walled cavity embedded in a porous medium was investigated with an inclined magnetic field. The governing equations were transformed into dimensionless equations and solved using the finite difference method. The effects of various parameters on the streamlines, isotherms, and concentration isolines were discussed.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2023)
Article
Multidisciplinary Sciences
Zehba Raizah, Abdelraheem M. Aly, Noura Alsedais, Mohamed Ahmed Mansour
Summary: The study investigates the effects of magnetic fields on mixed convection flow within an undulating cavity filled with hybrid nanofluids and porous media. Numerical simulations show that the length and position of the heater significantly impact the movement and heat transfer of nanofluids within the wavy cavity. Changes in heat generation coefficient and thermal radiation parameter affect the isotherms of the solid phase under different parameters.
SCIENTIFIC REPORTS
(2021)
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
Thermodynamics
Ammar Alsabery, Mohammad Vaezi, Tahar Tayebi, Ishak Hashim, Mohammad Ghalambaz, Ali J. Chamkha
Summary: This study investigates mixed convection of nanofluid within a wavy lid-driven enclosure with a prominent heat source. A two-phase method is used for the nanoliquid, resulting in a non-homogeneous concentration field. The governing equations are solved using the finite element technique. The study examines the effects of adding nanoparticles, wave number and amplitude of the wavy walls, and the aspect ratio of the heat source on heat transfer rate.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Mathematics
Bengisen Pekmen Geridonmez, Hakan F. Oztop
Summary: This study numerically investigated the two-dimensional, time-independent conjugate natural convection flow and entropy generation in three different cases. By considering the influence of different parameters, the convective heat transfer and total entropy generation in the fluid part were obtained in each case.
Article
Engineering, Multidisciplinary
Rowsanara Akhter, Mohammad Mokaddes Ali, M. A. Alim
Summary: This investigation explores the fluid flow and temperature behaviors, as well as entropy generation, of hybrid nanofluid in a partially heated cavity saturated by porous medium in the presence of an external magnetic field. The results show that the magnetic field strength, amount of hybrid nanoparticles, and cavity permeability have a significant influence on the fluid flow, temperature, and local entropy generation.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Om Prakash, Prabir Barman, P. S. Rao, Ram Prakash Sharma
Summary: In this study, free convection in a partially open square cavity with a wavy cold wall was investigated. The results showed that an increase in nanoparticle volume fraction or Hartmann number reduced overall convection, while the waviness of the cold wall increased the average Nusselt number.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Mathematics, Interdisciplinary Applications
Md. Fayz-Al-Asad, Mehmet Yavuz, Md. Nur Alam, Md. Manirul Alam Sarker, Omar Bazighifan
Summary: The effects of combined magneto-convection heat exchange in a driven enclosure with vertical fin were numerically analyzed, revealing that the length of the fin significantly impacts flow structure and heat line sketches. The results show that increasing the fin length can enhance heat removal performance from the enclosure to the adjacent fluid.
FRACTAL AND FRACTIONAL
(2021)
Article
Engineering, Mechanical
S. Hussain, M. S. Pour, M. Jamal, T. Armaghani
Summary: This paper studies the Magneto hydrodynamics (MHD) mixed convection and entropy analysis by introducing a power law hybrid nanofluid in a wavy elbow-shaped cavity with a quarter circle hot block and a rotating cylinder. The thermal and hydrodynamics behavior of the cavity is investigated by comparing the Nusselt (Nu) numbers. The study shows that the Nu number increases with an increasing power law index, clockwise rotation enhances the heat transfer rate, and increasing the aspect ratio increases the heat transfer rate.
EXPERIMENTAL TECHNIQUES
(2023)
Review
Engineering, Mechanical
R. Ghasemiasl, S. Hashemi, T. Armaghani, T. Tayebi, M. S. Pour
Summary: Nanoparticles have been widely used in liquids due to their impact on heat transfer growth rate and solving issues of using particles larger than nano in various currents. This article reviews and analyzes the research conducted in forced heat transfer of nanofluids within channels and pipes. The study finds that the geometric properties of channels and pipes, insertion of obstacles in flow path, and defined boundary conditions have significant influence on heat transfer growth and system efficiency.
EXPERIMENTAL TECHNIQUES
(2023)
Article
Engineering, Multidisciplinary
Bushra Ishtiaq, Ahmed. M. Zidan, Sohail Nadeem, Mohammed Kbiri Alaoui
Summary: This article presents a comparative study of magnetohydrodynamics stagnant point flow in hybrid nanofluid using the extended versions of the Yamada-Ota model and Xue model. The study considers a time-dependent and thermally radiative two-dimensional flow with a stretchable/shrinking permeable sheet. The hybrid nanofluid is formulated by suspending Aluminum Oxide Al2O3 and Copper Cu nanoparticles in water. The nonlinear dimensionless system of ordinary differential equations is solved numerically using the bvp4c methodology. The study finds that the heat transfer rate is higher in the Yamada-Ota model compared to the Xue model, and increasing the stretching parameter enhances the velocity field but deteriorates the temperature distribution.
AIN SHAMS ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Wajad Ulfat, Ayesha Mohyuddin, Muhammad Amjad, Tonni Agustiono Kurniawan, Beenish Mujahid, Sohail Nadeem, Mohsin Javed, Adnan Amjad, Abdul Qayyum Ashraf, Mohd Hafiz Dzarfan Othman, Sadaful Hassan, Muhammad Arif
Summary: This study developed a thermal insulation composite material using buffing dust-laden tanning waste mixed with polystyrene and a blowing agent, aiming to promote resource recovery and a circular economy. The composite material exhibited good thermal conductivity, compression strength, density, and water absorption compared to conventional insulation panels. The addition of buffing dust reduced the thermal conductivity of polystyrene by 10%. The composite material also showed thermal stability and the presence of functional groups. Overall, this work not only solved energy consumption issues but also contributed to environmental protection and air pollution reduction through recycling and reusing buffing dust waste as thermal insulation material.
Article
Energy & Fuels
Salah M. Salih, Ammar I. Alsabery, Ahmed K. Hussein, Muneer A. Ismael, Mohammad Ghalambaz, Ishak Hashim
Summary: The paper investigates the forced fluid flow within a horizontal channel containing two semi-cylinders and two flexible baffles. The melting of phase change material, convective and conductive heat transfers, and fluid-structure interaction are considered. The influential parameters are dimensionless time, elasticity modulus of the baffles, and Reynolds number. The results show that increasing Reynolds number and decreasing elasticity modulus lead to a decrease and increase, respectively, in the melting volume fraction.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Mehdi A. Fteiti, Mohammad Ghalambaz, Obai Younis, Mikhail Sheremet, Muneer Ismael
Summary: The impact of different foam shapes and configurations on the thermal energy storage rate was investigated for the first time in this study. A partial layer of metal foam was applied to enhance heat transfer in a channel-shaped latent heat thermal energy storage unit. The placement of the metal foam layer was varied to examine its effect on thermal energy storage power. The results demonstrated that changing the shape of the metal foam layer could significantly affect the storage power, with an approximately 60% variation observed for a fixed amount of metal foam. Therefore, careful selection of the metal foam layer's shape is crucial for design optimization.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Mathematics
Jana Shafi, Mikhail Sheremet, Mehdi Fteiti, Abdulkafi Mohammed Saeed, Mohammad Ghalambaz
Summary: The heat transfer during phase change in a heatsink filled with nano-enhanced phase change materials (NePCMs) was studied. The NePCM consisted of 1-Tetradecanol graphite nanoplatelets. The heatsink had an annular shape and experienced convective cooling on its outer surface and constant heat flux on its inner surface. The governing equations for momentum and heat transfer were solved using the finite element method. An artificial neural network (ANN) was used to establish the relationship between anisotropic angle, nanoparticle fractions, and melting volume fraction. The trained ANN showed high prediction accuracy and was used to generate melting fraction maps for design parameters. It was found that spreading the metal foam fins improved cooling performance without increasing weight, and nanoparticles had a negative effect on thermal energy storage capacity.
Article
Green & Sustainable Science & Technology
Naseer Abboodi Madlool, Mohammed J. Alshukri, Ammar I. Alsabery, Adel A. Eidan, Ishak Hashim
Summary: This paper investigates the convective heat transfer of laminar forced convection in a wavy channel. Numerical simulations using the finite element method are performed to obtain the 3D steady flow and heat transfer characteristics of Newtonian fluid. The study analyzes the effects of Reynolds number (10 < Re < 1000), number of oscillations (0 < N < 5), and wall amplitude (0.05 < A < 0.2) on the heat transfer. The results show that the average Nusselt number increases with the Reynolds number, and the number of oscillations and wall amplitude also affect the heat transfer.
INTERNATIONAL JOURNAL OF RENEWABLE ENERGY DEVELOPMENT-IJRED
(2023)
Article
Physics, Multidisciplinary
Mirza Naveed Jahangeer Baig, Nadeem Salamat, Faisal Z. Duraihem, Salman Akhtar, Sohail Nadeem, Jehad Alzabut, Salman Saleem
Summary: This study mathematically models the stagnation point flow over a heated stretching cylinder using the phase flow approach. The interaction between impinging stagnation flow and flow due to the stretching surface of the cylinder is thoroughly interpreted. Exact analytical solutions are computed and evaluated graphically. Heat transport analysis and Nusselt number interpretation are incorporated. The results show a dominant impinging stagnation flow for higher oncoming flow pressure and lower stretching velocity of the cylinder.
CHINESE JOURNAL OF PHYSICS
(2023)
Article
Thermodynamics
Mehdi Ghalambaz, Mutabe Aljaghtham, Ali J. Chamkha, Abdelkader Abdullah, Umar Alqsair, Mohammad Ghalambaz
Summary: A new design of fast charging latent heat thermal energy storage is proposed, which utilizes pressurized and heated liquid PCM to accelerate the charging process. Two layers of metal foam are added to further enhance the thermal charging process. The study investigates the impact of foam porosity, foam ratio, and layer placement on the design, and finds that high porosity metal foam can significantly reduce the charging time by forming a liquid PCM film between the inlet and outlet ports.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Materials Science, Characterization & Testing
M. Seyf Pour, S. Falahat, M. Mazinani, M. Kashefi, S. Ghanei
Summary: Eddy current (EC) is a non-destructive method widely used in metal industries for quality inspection purposes. This study utilizes the EC method to detect microstructural changes during annealing of a cold rolled steel plate and compares the electromagnetic results with hardness measurements and microstructure observations. The comparison demonstrates the ability of the EC method to differentiate recovery and recrystallization stages and extract valuable information from microstructural changes at various recrystallization levels.
NONDESTRUCTIVE TESTING AND EVALUATION
(2023)
Article
Environmental Sciences
Hamid Kazemi Moghadam, Seyed Soheil Mousavi Ajarostaghi, Mohsen Saffari Pour, Mohsen Akbary
Summary: The gas pressure in the transmission lines is reduced from 700-1000 psi to 250 psi as it enters the city, causing a drop in temperature and the possibility of freezing. To prevent freezing, heaters are used to preheat the gas. However, the high fuel consumption of these heaters is a major challenge.
Article
Energy & Fuels
Mehdi Fteiti, Mehdi Ghalambaz, Mikhail Sheremet, Mohammad Ghalambaz
Summary: The goal of this study is to investigate the use of phase change material (PCM) embedded with a high thermal conductive solid structure (metal foam). The inclusion of metal foam is aimed at enhancing effective heat conductivity and speeding up the storage process. The study finds that a random porous medium can provide a lower rate of PCM melting compared to a uniform porous medium, even with similar average porosity.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Multidisciplinary
Amir Momeni Dolatabadi, Mohsen Saffari Pour, Seyed Soheil Mousavi Ajarostaghi, Sebastien Poncet, Christopher Hulme-Smith
Summary: In this study, a modified profile for the stationary cascade blades of a 200 MW steam turbine is predicted by help of the Computational Fluid Dynamics (CFD) according to a cost-saving approach. The modified blade model exhibits reductions in erosion rate, entropy generation, and exergy destruction, as well as significant cost savings in maintenance.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Construction & Building Technology
Ali Lamrani Alaoui, Abdel-Illah Amrani, Seyed Soheil Mousavi Ajarostaghi, Mohsen Saffari Pour, Jamal-Eddine Salhi, Abdelkarim Daoudia, Mohammed Halimi
Summary: This paper conducts a thermal performance assessment of traditional building constructions in different climates of Morocco. The findings show that double brick structures are more energy-efficient, reducing the yearly energy requirement by 22% to 25%. Additionally, adjusting the roof pitch and improving insulation design can further decrease energy consumption and enhance thermal comfort.