Article
Thermodynamics
Shuvra Chowdhury, Partha Pratim Roy, Md. Hossain Raj, Sumon Saha
Summary: This study numerically investigates the flow characteristics and heat transfer performance of pure mixed convective power-law fluid in a lid-driven square chamber with a discrete thermal source at the bottom surface. The study considers different cases by changing the direction of the moving walls, Grashof and Reynolds numbers, power-law index, and non-dimensional thermal source length. The results show that smaller heat sources lead to higher heat transfer rates, with the smallest heat source exhibiting a 76% improvement compared to the largest heat source. The opposite sidewall motion yields significantly higher heat transmission efficiency compared to downward or upward wall motion, and the heat transfer performance is affected by the power-law index.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
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
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
Noor Zeb Khan, Rashid Mahmood, Sardar Bilal, Ali Akgul, Sherzod Abdullaev, Emad E. Mahmoud, Ibrahim S. Yahia, Choonkil Park
Summary: The study focuses on the simultaneous effects of external forcing mechanisms and internal volumetric forces on non-Newtonian liquid in a square enclosure. The upper lid is assumed to have a constant magnitude of slip velocity, while thermal equilibrium is disturbed by uniform temperature at the lower boundary and cold walls. The formulation is initially obtained in dimensional form and then converted into a dimensionless representation. Numerical solutions are obtained through Galerkin finite element discretization. The results are validated by comparison with existing studies and grid independence tests. The study shows the variations in flow distributions, kinetic energy, and local heat flux for different heating situations.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
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
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
Thermodynamics
S. Saqib Shah, Rizwan Ul Haq, Wael Al-Kouz
Summary: This study explores the thermal performance of nanofluid enclosed by a split lid-driven trapezoidal cavity with an elliptic shaped obstacle. Various parameters such as Richardson number, Lewis number, Reynolds number, and buoyancy ratio are analyzed for their effects on velocity, temperature, and concentration profiles. The findings indicate that Lewis number has a significant impact on isotherms and concentration, while smaller buoyancy ratios result in maximum heat transfer near the lid walls.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
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
Thermodynamics
Mohammed Azeez Alomari, Khaled Al-Farhany, Nejla Mahjoub Said, Mujtaba A. Flayyih
Summary: This paper numerically studied the double-diffusive mixed convection of MWCNT/water in a curvilinear cavity with split lid-driven and hot ellipses. The heat and mass transfers were found to be greatly enhanced with the increase of Reynolds number in the case of low Richardson number. However, the effect of Reynolds number becomes unnoticeable with a high Richardson number. Furthermore, Lewis number has a positive effect on heat and mass transfer, and this effect increases with increasing Richardson number.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
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
S. Gupta, A. Chauhan, C. Sasmal
Summary: This study investigates the influence of adding solid polymers on mixed convective heat transfer phenomena. The results show that the addition of polymers can induce elastic instability and elastic turbulence, leading to an increase in heat transfer rate.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Mechanics
Aneela Bibi, Hang Xu
Summary: This article investigates fluid dynamics and heat transfer properties in a trapezoidal enclosure containing a heated cylindrical object. It explores the interaction of multiple physical processes and analyzes the governing equations numerically. The findings demonstrate the various factors influencing the thermal and mass transfer in the enclosure, and the effectiveness of the multiple expression programming (MEP) technique in predicting heat transfer behavior.
Article
Physics, Multidisciplinary
I. R. Ali, A. I. Alsabery, M. Mohamad, M. G. Kamardan, N. A. Bakar, R. Roslan
Summary: This study numerically investigates mixed convection in a rectangular double lid-driven cavity filled with hybrid nanofluid. The results show that the rate of heat transfer is improved by increasing the volume fraction of hybrid nanoparticles and the amplitude ratio. Non-uniform heating at the cavity walls tends to provide higher heat transfer rate, and the heat transfer rate increases with the Reynolds number.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2022)
Article
Multidisciplinary Sciences
Md. Jisan Mahmud, Ahmed Imtiaz Rais, Md. Rakib Hossain, Sumon Saha
Summary: This study investigates conjugate mixed convection heat transmission in a square enclosure with internal heat generation. The results show that the thermal performance of the system is less dependent on the rotational speed and direction of the solid cylinder, and heat transfer is enhanced with increasing Reynolds and Grashof numbers.
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, Mechanical
L. Ben Said, L. Kolsi, N. Ben Khedher, F. Alshammari, E. H. Malekshah, A. K. Hussein
Summary: This study numerically investigates the fluid-structure interaction during CNT-water nanofluid mixed convection in a micro-channel with elastic fins. The results show that fin oscillations can reduce drag and lift forces, improve heat transfer and cooling, and the dispersion of CNT nanoparticles in water-based fluid significantly enhances the convection process.
EXPERIMENTAL TECHNIQUES
(2023)
Article
Environmental Sciences
M. E. H. Attia, A. K. Hussein, H. J. Abdul-Ammer, M. Arici, M. B. Ben Hamida, O. Younis, A. Abidi
Summary: A single slope solar distiller with a tilt angle of 32.5 degrees was tested in Al-Hilla city, Iraq. Two types of distillers, including a modified one with twenty-five salt balls, were examined along with different water depths. The results showed that using salt balls increased the productivity of the modified solar distiller. The modified solar distiller with a water depth of 1.5 cm and salt balls achieved the highest productivity.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Thermodynamics
Emad Hasani Malekshah, Ahmed Kadhim Hussein, Lioua Kolsi
Summary: The purpose of this study is to address the cooling issue of electronic packages by simulating the convective heat transfer of nanofluid flow over dissipating fins using a numerical approach and evaluating the properties of nanofluid based on experimental measurements.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2023)
Article
Chemistry, Multidisciplinary
Milad Alizadeh, Amin Fazlollahtabar, Ahmed Kadhim Hussein, Hussein Ali Ameen, D. D. Ganji, Uddhaba Biswal, Bagh Ali
Summary: The interaction between magneto-hydrodynamic buoyant convection and radiation in a hexagonal enclosed space filled with SWCNTs/water nanoliquid was studied for the first time. The research examined the effects of various parameters on the fluid flow and heat transfer, including Rayleigh number, heated region length, internal hexagonal body conditions, solid volume fraction, and radiation parameter. The results showed that the Nusselt number along the heated bottom wall increased with increasing Rayleigh number, while the stream function and Nu(out) decreased as the Hartmann number increased. The profiles of stream function, temperature, and velocity were highest in the heated condition, followed by the adiabatic condition, and lowest in the cold condition.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Energy & Fuels
Ahmed Kadhim Hussein, Mohammed El Hadi Attia, Husham Jassim Abdul-Ammer, Muesluem Arici, Mohamed Bechir Ben Hamida, Obai Younis, Raad Z. Homod, Awatef Abidi
Summary: In this research, low-cost energy storage materials were used to enhance the performance of single-slope solar distillers. The conventional distiller was modified by adding salt balls and sponges to the basin at different water depths. The findings showed that using these energy storage materials significantly increased the productivity of the modified solar distillers.
Article
Energy & Fuels
Mohammed El Hadi Attia, Ahmed Kadhim Hussein, Ganesh Radhakrishnan, Sivakumar Vaithilingam, Obai Younis, Nevzat Akkurt
Summary: This study conducted experimental research on the impact of reflective aluminum foils, metal sheets, and phosphate granules on the productivity and efficiency of hemispherical solar stills under solar conditions in El-Oued, Algeria. The results showed that the modified solar still with reflective aluminum foil, zinc metal sheets, and copper sheets demonstrated improved productivity compared to traditional solar stills. The addition of these materials increased radiation reflection and energy storage, leading to higher temperatures in the saltwater basin. In another experiment, it was found that the modified solar still with aluminum foil and phosphate granules exhibited the highest improvement rate in productivity compared to those with zinc metal sheets and phosphate granules, and copper metal sheets and phosphate granules.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Construction & Building Technology
Raad Z. Homod, Zaher Mundher Yaseen, Ahmed Kadhim Hussein, Amjad Almusaed, Omer A. Alawi, Mayadah W. Falah, Ali H. Abdelrazek, Waqar Ahmed, Mahmoud Eltaweel
Summary: Chillers account for almost half of the energy demand in buildings, making control systems for multi-chiller crucial for achieving optimal balance between indoor thermal comfort and energy efficiency. The proposed DCCMARL algorithm combines deep clustering and cooperative multi-agent reinforcement learning to effectively control the system and achieve significant energy savings. The results demonstrate that the agents' ability to manipulate the behavior of the building can improve indoor thermal conditions and save up to 44.5% energy compared to conventional methods.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Mathematics
Lioua Kolsi, Ahmed Kadhim Hussein, Walid Hassen, Lotfi Ben Said, Badreddine Ayadi, Wajdi Rajhi, Taher Labidi, Ali Shawabkeh, Katta Ramesh
Summary: A numerical investigation was conducted on a PCM energy storage tank using CNT-water nanofluid, under actual climatic conditions of Ha'il region, Saudi Arabia. It was found that using CNT-nanofluid led to a reduction in charging time and improved performance. An increase in flow rate accelerated the melting process. The use of baffles had no beneficial effects on the melting process.
Article
Mathematics
Bagh Ali, Anum Shafiq, Meznah M. M. Alanazi, Awatif A. A. Hendi, Ahmed Kadhim Hussein, Nehad Ali Shah
Summary: This study investigates the importance of varying the radius D-p of Copper nanoparticles for microgravity-modulated mixed convection in micropolar nanofluid flux under an inclined surface subject to a magnetic field and heat source. The results show that the size of nanoparticles greatly influences the flow and temperature of the nanofluid. Various parameters, such as D-p, modulation amplitude epsilon, material parameter beta, mixed convection parameter lambda, inclination angle gamma, and magnetic parameter M, significantly affect the Nusselt number, couple stress, and skin friction coefficient. These findings have important implications for space transportation and materials' performance.
Article
Mathematics
Meznah M. Alanazi, Awatif A. Hendi, Bagh Ali, Sonia Majeed, Ahmed Kadhim Hussein, Nehad Ali Shah
Summary: The study investigates the time-independent performance of a micropolar nanofluid on a stretching sheet influenced by magneto hydrodynamics and the presence of a porous medium. Nano-sized particles were added to the base fluid due to their extraordinary heat-enhancing ability, which plays a crucial role in various applications. The effects of Brownian motion and thermophoresis were considered, and a numerical approach using the bvp4c method in MATLAB was implemented to analyze the influence of different parameters on velocity, micro-rotation, concentration, and temperature profiles.
Article
Engineering, Chemical
Aravind Samraj, Debabrata Barik, Metta Laxmi Deepak Bhatlu, Sachindra Kumar Rout, Badreddine Ayadi, Walid Aich, Ahmed Kadhim Hussein, Lioua Kolsi
Summary: Using a blend of LFWCO and DEE as fuel in a diesel engine can improve performance and reduce emissions, with LFWCO+15-DEE blend showing the best results in various parameters.
Review
Energy & Fuels
Farhan Lafta Rashid, Nabeel S. Dhaidan, Ahmed Kadhim Hussein, Fadhel Noraldeen Al-Mousawi, Obai Younis
Summary: Ground heat exchangers (GHEs) have been proven to be an effective and reliable method for utilizing geothermal energy. This review summarizes the analytical, numerical, and experimental investigations on the thermal performance of different types of vertical and horizontal GHEs. The review also introduces recent advances in hybrid combinations of GHEs and discusses the economic analysis of applying GHEs.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Raad Z. Homod, Ghazwan Noori Saad Jreou, Hayder Ibrahim Mohammed, Amjad Almusaed, Ahmed Kadhim Hussein, Wael Al-Kouz, Hussein Togun, Muneer A. Ismael, Hussein Alawai Ibrahim Al-Saaidi, Omer A. Alawi, Zaher Mundher Yaseen
Summary: Due to the influence of nonlinearities and high delay time, a hybrid model combining white-box and black-box approaches is developed to handle the behavior of a complex oil field system in Iraq. This model effectively represents the large data sets and achieves optimal fitness to measured values. The conversion of fuzzy rules into a multilayer perceptron network and the use of clustering technique and Gauss-Newton regression enhance the predictive performance of the hybrid model.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Thermodynamics
Bhose Ganga, Sekar Charles, Abdul Kaffoor Abdul Hakeem, Manoj Kumar Nayak, Taseer Muhammad, Naura Albogami, Sivanandam Sivasankaran
Summary: The convective 3-D MHD boundary-layer transport of Casson liquid is studied in this research. The study takes into account the presence of an unsteady stretchable sheet, a permeable medium, and variable thermal conductivity. Conservation laws are transformed into ordinary differential equations (ODEs) and solved using the fourth-order Runge-Kutta integration scheme in conjunction with the shooting procedure. The obtained numerical results for a specific case show good agreement with existing results.
Article
Mathematics, Interdisciplinary Applications
Vinodh Srinivasa Reddy, Jagan Kandasamy, Sivasankaran Sivanandam
Summary: This study used a novel Casson model to investigate the flow of hybrid Al2O3-Cu/ethylene glycol nanofluid over a moving thin needle under MHD, Dufour-Soret effects, and thermal radiation. The governing partial differential equations were transformed into ordinary differential equations using appropriate transformations, and these equations were solved analytically using HAM. The study analyzed the effects of various parameters on velocity, temperature, and concentration profiles, and also discussed the impacts of the Casson parameter and the inclusion of nanoparticles on skin friction coefficient and heat transfer rate. The article also entangled local skin friction, a local Nusselt number, and a local Sherwood number for multiple parameters.
MATHEMATICAL AND COMPUTATIONAL APPLICATIONS
(2023)
