Article
Multidisciplinary Sciences
Najiyah Safwa Khashi'ie, Iskandar Waini, Norihan Md Arifin, Ioan Pop
Summary: The proficiency of Cu-Al2O3/water hybrid nanofluid as a heat transfer coolant was numerically analyzed using the bvp4c interface in Matlab software. The results indicated that the nanofluid can significantly enhance heat transfer performance, although an increase in squeezing parameter leads to a decrease in heat transfer coefficient and an increase in suction strength contributes to better heat transfer.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Multidisciplinary
Pascalin Tiam Kapen, Cedric Gervais Njingang Ketchate, Didier Fokwa, Ghislain Tchuen
Summary: This paper investigates the stability of a hybrid nanofluid flow between two parallel and stationary plates filled with a porous medium. Factors such as aspiration/injection, magnetic field, and particle density were found to affect the flow stability.
ALEXANDRIA ENGINEERING JOURNAL
(2021)
Article
Thermodynamics
Yuling Zhai, Peitao Yao, Xin Shen, Hua Wang
Summary: This study investigates the use of nanofluids and porous media in microchannels to reduce pressure drop and enhance heat transfer. Numerical simulations and analytical methods are used to evaluate the effects of porosity and hybrid nanofluids on flow and heat transfer. The results show that porous media can reduce pressure drop and enhance heat transfer, and nanoparticle migration affects heat transfer. The effect of thermophoretic diffusion is higher in micro-scale convective heat transfer.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Energy & Fuels
Kashif Ali, Sohail Ahmad, Kottakkaran Sooppy Nisar, Aftab Ahmed Faridi, Muhammad Ashraf
Summary: Hybrid nanoliquids exhibit improved physical strength, mechanical resistance, thermal conductivity, and chemical stability compared to individual nanoliquids. The study found that hybrid nanofluids have the potential to significantly increase shear stress levels, up to 57% in some cases. Caution must be exercised in using these fluids, particularly in applications where control over shear stress is necessary.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Man Yi Wong, Yihao Zhu, Yijun Zeng, Tsz Chung Ho, Yinchuang Yang, Huihe Qiu, Chi Yan Tso
Summary: This study introduced a novel thermal diode using hybrid nanofluids, showing improved thermal rectification performance. However, aggregation of nanoparticles deposited on the evaporation surface can negatively impact the efficiency. It is important to balance the thermal conductivity and stability of the hybrid nanofluids for long-term operation.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xiangcheng You
Summary: This study investigates the nanoparticle sphericity of Cu-Al2O3-H2O hybrid nanofluid flows in porous medium-filling inclined channels. It provides analytical solutions for the velocity and temperature fields, considering various parameters such as mixed convection variable, Peclet number, channel tilt angle, and nanoparticle sphericity and volume fractions. The findings show that the effective thermal conductivity increases with increasing temperature for the same nanoparticle volume fractions. Nanoparticles with smaller average sphericity size have a greater specific surface area and enhance internal heat transfer. Additionally, increasing nanoparticle volume fraction leads to a slower but still significant enhancement of heat transfer.
Article
Mathematics, Applied
Glory Mary Givi, B. Mahanthesh
Summary: The study investigates the time-dependent slip flow and heat transport of Cu-Al2O3 hybrid nanofluid through a vertical permeable plate with Hall current and variable suction. Results show that the exponential heat source increases the temperature profile, while the quadratic convection decreases it. The applied magnetic field and nonlinear convection aspects reduce the axial velocity field, while quadratic convection and exponential space-dependent heat source are favorable to friction factors. Additionally, global heat transfer is increased in the presence of an exponential space-dependent heat source and hybrid nanoparticles.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2021)
Article
Chemistry, Physical
Ming-yan Ma, Yu-ling Zhai, Zhou-hang Li, Pei-tao Yao, Hua Wang
Summary: This study investigated the impact of different sizes of nanoparticles on the rheological properties of hybrid nanofluids, revealing that volume fraction and nanoparticle size both play significant roles in determining viscosity. Synergistic effects in hybrid nanofluids were found to influence nanoparticle arrangement, allowing for the manipulation of viscosity by adjusting nanoparticle size at different volume fractions.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Mathematics
Majid Hussain, Akhtar Ali, Mustafa Inc, Ndolane Sene, Muhammad Hussan
Summary: The impacts of chemical reaction and suction/injection in Williamson fluid flow along a porous stretching wedge are discussed in this paper. The heat transport behavior of Williamson fluid due to a stretching porous wedge with suction or injection is studied using numerical methods.
JOURNAL OF MATHEMATICS
(2022)
Article
Energy & Fuels
Youngho Lee, Hyomin Jeong, Yonmo Sung
Summary: An experimental study was conducted on the thermal absorption performance of water-based carbon nanotubes (CNTs), Cu, and Al2O3 nanofluids for solar thermal harvesting. It was found that carbon-based nanofluids (CNTs) exhibited the highest thermal absorption performance, with increasing nanoparticle concentrations improving the overall performance. The 0.1 wt.% CNTs nanofluid was identified as the most cost-effective option, while higher concentrations showed better performance for Al2O3 and Cu nanofluids.
Article
Thermodynamics
Ahmed K. Abu-Nab, Ali F. Abu-Bakr
Summary: This paper investigates the nonlinear multibubble model with bubble-bubble interaction in Cu Al2O3/water hybrid nanofluid, and its influence on the growth process of bubbles in the nanofluid.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Hussein Togun, Raad Z. Homod, Zaher Mundher Yaseen, Azher M. Abed, Jameel M. Dhabab, Raed Khalid Ibrahem, Sami Dhahbi, Mohammad Mehdi Rashidi, Goodarz Ahmadi, Wahiba Yaici, Jasim M. Mahdi
Summary: This study investigates the heat transfer enhancement of hybrid Al2O3-Cu/water nanofluids flowing in a two-dimensional channel with semicircle ribs. The simulation results showed that the presence of ribs enhanced the heat transfer in the passage.
Article
Engineering, Chemical
Thanh Truc Nguyen Hoang, Yu-Shih Lin, Thi Nhu Huynh Le, Tien Khoa Le, Thi Kieu Xuan Huynh, De-Hao Tsai
Summary: A facile approach was demonstrated for the fabrication of Cu-ZnO-based hybrid nanostructures for the catalytic CO2 conversion to methanol. The presence of Al2O3 was found to enhance the performance of the Cu-ZnO nanocatalyst.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Chemistry, Physical
Abdul Rehman, Sana Yaqub, Majid Ali, Hassan Nazir, Nadia Shahzad, Sehar Shakir, Rabia Liaquat, Zafar Said
Summary: This study investigates the influence of eight surfactants on the properties of hybrid nanofluids containing Aluminum oxide (Al2O3) and Titanium dioxide (TiO2). The results show that polyvinylpyrrolidone (PVP) exhibits the highest stability among all surfactants, while polyethylene glycol (PEG) shows the highest viscosity enhancement. Additionally, all the nanofluids exhibit Newtonian behavior. The study emphasizes the potential of PVP as a surfactant for long-term heat transfer applications.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Najiyah Safwa Khashi'ie, Iskandar Waini, Mohd Fariduddin Mukhtar, Nurul Amira Zainal, Khairum Bin Hamzah, Norihan Md Arifin, Ioan Pop
Summary: This study numerically and statistically analyzed the mixed convection flow characteristics of a water-based Cu-Al2O3 hybrid nanofluid on a vertical and permeable wedge. The results show that enhancing the controlling parameters can improve the flow and thermal progresses. Additionally, the statistical analysis using response surface methodology highlights the significant impact of the wedge parameter and nanoparticle concentration.
Article
Computer Science, Interdisciplinary Applications
Assad Ayub, Zulqurnain Sabir, Hafiz A. Wahab, Mohammed Balubaid, S. R. Mahmoud, Mohamed R. Ali, R. Sadat
Summary: Control of energy transport using external forces, particularly magnetic force, is a crucial topic in applied mathematics. This study focuses on the impact of variable thermal conductivity and Lorentz's force on unsteady flow of Cross nanofluid, specifically in contracting/extracting cylinder. The effects of physical parameters on fluid behavior and mass transport in different regions and geometries were comprehensively investigated using numerical methods. The obtained numerical solutions were compared and presented through figures and tables.
ENGINEERING WITH COMPUTERS
(2023)
Correction
Computer Science, Interdisciplinary Applications
Assad Ayub, Zulqurnain Sabir, Hafiz A. Wahab, Mohammed Balubaid, S. R. Mahmoud, Mohamed R. Ali, R. Sadat
ENGINEERING WITH COMPUTERS
(2023)
Article
Engineering, Mechanical
Basharat Ullah, Hafiz Abdul Wahab, Umar Khan, Saira Bhatti
Summary: This research study investigates the effects of magnetohydrodynamic and mass suction on the flow and heat transfer of nanofluids over curved stretching/shrinking surfaces. The partial differential equations are transformed into ordinary differential equations using similarity transformation for numerical analysis. The critical values of certain characteristics, such as stretching/shrinking, suction, and curvature, decrease as the volume fractions of nanoparticles increase, indicating an increase in stability.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2023)
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
Physics, Multidisciplinary
Zafar Mahmood, Umar Khan
Summary: The study evaluates the effects of nanoparticle aggregation on mixed convective stagnation point flow and porous media utilizing a permeable stretched vertical Riga plate. The aggregation of nanoparticles was evaluated with modified versions of the Krieger-Dougherty and Maxwell-Bruggeman models. Numerical solutions were obtained using the Runge-Kutta (RK-IV) with shooting technique in Mathematica. The results showed that aggregation models provided more accurate velocity and skin fraction profiles than homogeneous models.
Article
Mathematics, Applied
Basharat Ullah, Salman A. A. Al Qahtani, Mostafa Dahshan, Hafiz Abdul Wahab, Umar Khan
Summary: In this study, the behavior of micropolar fluids on a curved stretching surface was investigated. The impact of cross-diffusion gradients on velocities, temperatures, and concentrations was examined by integrating thermo-diffusion and diffusion-thermo effects into the equations. The resulting nonlinear ordinary differential equations were solved using practical similarity transformations and the Runge-Kutta numerical procedure. The findings regarding velocity, concentration, temperature profiles, and the fluctuations of skin friction coefficient, Nusselt and Sherwood numbers have important implications for engineering and industry.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2023)
Article
Chemistry, Multidisciplinary
Basim M. Makhdoum, Zafar Mahmood, Bandar M. Fadhl, Musaad S. Aldhabani, Umar Khan, Sayed M. Eldin
Summary: This study investigates the effect of nanoparticle aggregation on the thermal conductivity of nanofluids. Experimental measurements of velocity, temperature, and entropy production are performed with and without nanoparticle aggregation. The results show that nanoparticle aggregation improves the thermal conductivity and increases the velocity, temperature, and entropy generation.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Umar Khan, Zafar Mahmood, Sayed M. Eldin, Basim M. Makhdoum, Bandar M. Fadhl, Ahmed Alshehri
Summary: In order to prevent reaction explosions, chemical engineers and scientists analyze the kinetics and activation energies of chemical reactions involving binary chemical mixtures. Nanofluids with Arrhenius kinetics are important for various industrial uses. This study focuses on how thermal radiation affects heat and mass transfer during convective flow across a vertical plate with a binary chemical reaction. The mathematical model was solved using the Runge-Kutta method, and the results showed the effects of various factors on temperature, velocity, concentration, and skin friction. Comparisons with previous research confirmed the accuracy of the findings.
Article
Engineering, Multidisciplinary
Adil Darvesh, Hafiz Abdul Wahab, Weerachai Sarakorn, Manuel Sanchez-Chero, Oscar Apaza Apaza, Susana Soledad Chinchay Villarreyes, Aurelia Zavala Palacios
Summary: This paper presents the effects of cross fluid model on entropy generation and melt process. The Cross-fluid viscosity model based on the infinite shear rate effect is used with Riga plate. A system of partial differential equations (PDEs) is obtained through physical interpretation and further transformed into a system of ordinary differential equations (ODEs) using similarity variables. Numerical experiments using the Keller Box approach are conducted and the obtained results show that the melt process loses temperature while the entropy generation increases temperature visibility.
RESULTS IN ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Saeed Ullah Jan, Umar Khan, Saeed Islam, Muhammad Ayaz
Summary: The article investigates the flow of a ternary hybrid nanofluid with cylindrical shape nanoparticles over a stretching surface, considering the impact of variable thermal conductivity. Mathematical modeling and numerical solution techniques are used to solve the resulting system of ordinary differential equations. The study examines how physical quantities, such as magnetic field, injection/suction, nanoparticles volume fraction, and variable thermal conductivity, affect the velocity, skin friction, temperature, and local Nusselt number.
Article
Materials Science, Multidisciplinary
Khadija Rafique, Zafar Mahmood, Umar Khan
Summary: There are various real-world uses for hybrid nanofluids, including microfluidics, dynamic sealing, and heat dissipation. The use of hybrid nanofluids in MHD flow over a stretching surface with varying viscosity can enhance heat transfer rates in industries such as electronics cooling, aerospace thermal management, and energy systems. However, further studies are needed to explore the properties of hybrid nanofluids in boundary layer flow and heat transfer rates under different physical assumptions.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Khadija Rafique, Zafar Mahmood, Aisha M. Alqahtani, Awatif M. A. Elsiddieg, Umar Khan, Wejdan Deebani, Meshal Shutaywi
Summary: Interest in nanofluids with nanoparticle-induced aggregation effects, such as solar-powered energy and crossflow heat transfer, is growing in the modern industrial sector. This research focuses on the impact of nonlinear radiation, changes in viscosity, and aggregation on the flow of ethylene glycol-based nanofluids in three dimensions. Non-axisymmetric stagnation point flows on stretching sheets are considered. The study utilizes modeling, numerical solutions, and graphical analysis to investigate the effects of various parameters on heat transmission and friction coefficient.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Engineering, Multidisciplinary
Salma Khan, Muhammad Gulistan, Nasreen Kausar, Dragan Pamucar, Tzung-Pei Hong, Hafiz Abdul Wahab
Summary: In this paper, a decision-making problem with a q-rung orthopair fuzzy hypersoft environment is developed, and two operators of ordered weighted average and induced ordered weighted average are developed. Several fundamental features are also derived. The induced ordered weighted average operator is essential in a q-ROFH environment as the induced ordered aggregation operators are special cases of the existing aggregation operators that already exist in q-ROFH environments. The main function of these operators is to help decision-makers gain a complete understanding of uncertain facts. The proposed aggregation operator is applied to a decision-making problem, with the aim of selecting the most promising real estate project for investment.
CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES
(2023)
