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, Mechanical
M. S. Aghighi, A. Ammar, H. Masoumi
Summary: This study investigates the double-diffusive natural convection of non-Newtonian Casson fluid in a square cavity and finds that yield stress plays a significant role in fluid behavior. The analysis of the governing parameters reveals that the Rayleigh number, yield number, buoyancy ratio number, and Lewis number have a significant impact on heat and mass transfer, the morphology of yielded/unyielded regions, and fluid flow.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Mechanical
Sadia Afsana, Md. Mamun Molla, Preetom Nag, Litan Kumar Saha, Sadia Siddiqa
Summary: The study investigates 2D laminar MHD natural convection flow of non-Newtonian ferrofluid in a wavy enclosure, focusing on heat transfer, streamlines, isotherms, and entropy generation. Numerical simulations reveal differences in behavior and properties of different fluid types under magnetic field influence, with significant effects on heat transfer and entropy generation.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Thermodynamics
Shantanu Dutta, Navneet Goswami, Sukumar Pati, Arup Kumar Biswas
Summary: This study investigates the natural convection heat transfer and entropy generation characteristics in a rhombic enclosure filled with a porous medium and inclined at 30 degrees. Results show significant influence of phase shift angle, Rayleigh number, and Darcy number on heat transfer rate, with entropy generation primarily induced by heat transfer and maximum entropy values varying with phase angle.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Darya S. Loenko, Aroon Shenoy, Mikhail A. Sheremet
Summary: This paper presents the computational analysis of unsteady natural convection of a non-Newtonian fluid in an enclosure, considering the time sinusoidal dependence of the wall temperature. The results show the impact of fluid properties and wall temperature oscillation frequency on convective heat and mass transfer.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Mathematics, Applied
P. G. Siddheshwar, C. Kanchana, L. M. Perez, D. Laroze
Summary: This study investigates the linear and nonlinear stability of axisymmetric convection of a viscous fluid in a cylindrical enclosure heated from below with different radius to height ratios. The use of a Maclaurin series representation for the eigenfunctions of the linear problem and its application in determining the solution with the convective mode is a novelty in this study. Furthermore, the influence of boundaries and the effect of throughflow on chaotic and periodic regimes of motion are studied.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2023)
Article
Physics, Multidisciplinary
Asia Yasmin, Kashif Ali, Muhammad Ashraf
Summary: This study investigates the flow and thermal characteristics of MHD Casson nanofluid in a square enclosure with non-uniform heat source using the Brinkman model. The impact of governing parameters on local Nusselt number, streamlines and isotherms is demonstrated, showing the increase in Raleigh number results in sharp temperature rise in the middle of the enclosure with steeper thermal distribution near the walls. High values of the Rayleigh number also highlight the effect of the magnetic field as a force of retardation.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Chemistry, Analytical
Vemula Rajesh, Mikhail Sheremet
Summary: This paper investigates the natural convection of a ternary hybrid nanosuspension in a closed cavity with a linearly warming side border. The motion and energy transfer of the hybrid nanosuspension are modeled using partial differential equations and the Boussinesq approximation. The impact of different factors on the flow and thermal patterns, as well as the Nusselt number, is analyzed using streamlines, isotherms, and other suitable patterns. The study shows that the addition of a third kind of nanomaterial enhances the energy transport within the closed cavity.
Article
Thermodynamics
Ali Raza, Kamel Al-Khaled, M. Ijaz Khan, Sami Ullah Khan, Saadia Farid, Absar Ul Haq, Taseer Muhammad
Summary: In this study, the unsteady natural convection flow of Maxwell fluid over an infinite plate was investigated using fractional derivatives, taking into account various factors such as slip conditions, Newtonian heating effect, MHD, and radiation. The use of CF fractional derivatives led to temperature and velocity profiles showing a declining trend compared to AB fractional derivatives. Moreover, the velocity and temperature fields decayed by adjusting the fractional parameters in both AB and CF cases.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Physics, Multidisciplinary
Amna Yasin, Naeem Ullah, S. Saleem, Sohail Nadeem, A. Al-Zubaidi
Summary: This article presents a numerical study on laminar natural convective flow in a porous rectangular cavity with two heated rods. The finite element method is used to obtain solutions for the partial differential equations, and the results show that non-uniform heating suppresses heat transfer rate compared to uniform heating, an increase in heated rod length strengthens the flow field, and greater permeability of the porous medium enhances velocity distribution and Nusselt number.
Article
Physics, Multidisciplinary
Amzad Hossain, Preetom Nag, Md Mamun Molla
Summary: This study investigates the numerical simulation of magnetohydrodynamic mixed convection with a non-uniformly heated plate using the GPU-based lattice Boltzmann method. The influence of parameters such as Richardson number, Hartmann number, power-law index, ferroparticles volume fraction, and magnetic field angle on the flow phenomena and entropy generation are studied. The results show the relationship between the influential parameters and the average Nusselt number, as well as the total entropy generation.
Article
Green & Sustainable Science & Technology
Shafqat Hussain, Muhammad Jamal, Zoubida Haddad, Muslum Arici
Summary: The influence of a magnetic field on thermosolutal free convective flow inside a porous enclosure is investigated in this study. The results show that the magnetic field decreases heat and mass transport, and the effects of different parameters on flow intensity and transfer rates vary.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Engineering, Chemical
Kourosh Javaherdeh, Habib Karimi, Abbas Khojasteh
Summary: This study investigates the heat transfer enhancement and pressure drop in a parallel channel partially filled with porous blocks and non-Newtonian nanofluid. Increasing the Reynolds number can improve heat transfer, and using a non-Newtonian nanofluid with a power-law index of 1.5 can achieve a higher Nusselt number compared to Newtonian fluids.
Article
Mathematics, Interdisciplinary Applications
Tarikul Islam, Mehmet Yavuz, Nazma Parveen, Md Fayz-Al-Asad
Summary: In this article, the unsteady free convective heat transport of copper-water nanofluid within a square-shaped enclosure with the dominance of non-uniform horizontal periodic magnetic effect is numerically investigated. The study explores the influence of various physical parameters on the temperature transport and fluid flow, and compares the performance of different nanofluids. The results show that the Fe3O4-water nanofluid exhibits the best heat transport performance, and the heat transportation rate increases with the addition of nanoparticles while decreasing with the increase of Hartmann number and diameter of particles. The study also demonstrates the significant impacts of non-uniform magnetic effect and nanoparticles' Brownian movement on the temperature transport and fluid flow.
FRACTAL AND FRACTIONAL
(2022)
Article
Engineering, Multidisciplinary
Babar Iftikhar, Muhammad Arshad Siddiqui, Tariq Javed
Summary: The study investigates the influence of a non-uniform magnetic field on heat transfer and entropy generation in the convection flow of ferrofluid. The governing equations are transformed into algebraic equations and solved using the Newton-Raphson method. Results show that increasing the magnetic number decreases fluid velocity and entropy generation. The intensity of streamlines decreases and velocity and temperature profiles increase with an increase in ferroparticle concentration.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Mathematics, Applied
Imran Siddique, Ali Akgul
Summary: In this study, a physical scheme called the blood liquor absorption model has been examined in its fractional form using the constant proportional Caputo (CPC) hybrid fractional operator. The logical solutions of the absorptions of liquor in stomach and blood have been explored using the Laplace transform technique and are presented in the forms of generalized G-functions and bivariate Mittage-Leffler functions. Furthermore, a detailed analysis, including numerical explanation and stability analysis, is presented.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2023)
Article
Mathematics, Applied
Abd Ullah, Aman Ullah, Shabir Ahmad, Imtiaz Ahmad, Ali Akgul
Summary: This paper investigates the complex population dynamical model under the fuzzy Caputo fractional derivative. By employing fuzzy Laplace transform and Adomian decomposition, general numerical results for the proposed model are obtained, and two examples are provided to support the proposed procedure.
NUMERICAL METHODS FOR PARTIAL DIFFERENTIAL EQUATIONS
(2023)
Article
Multidisciplinary Sciences
Umar Farooq, Hassan Waqas, Nahid Fatima, Muhammad Imran, Sobia Noreen, Abdul Bariq, Ali Akgul, Ahmed M. Galal
Summary: The dominant characteristics of hybrid nanofluids, such as rapid heat transfer rates, superior electrical and thermal conductivity, and low cost, have attracted the interest of researchers worldwide. This study investigates the effects of a silver and cobalt ferrite-based hybrid nanofluid with MHD between a rotating disk and a cone. By utilizing similarity transformations, the set of partial differential equations is transformed into a set of ordinary differential equations. The volume proportion of nanoparticles and the temperature distribution profile are found to increase, making this hybrid nanofluid more efficient for metallurgical, medicinal, and electrical applications. Additionally, the antibacterial properties of silver nanoparticles can be utilized for bacteria growth inhibition.
SCIENTIFIC REPORTS
(2023)
Article
Multidisciplinary Sciences
Khalid Abdulkhaliq M. Alharbi, Adnan, Mutasem Z. Bani-Fwaz, Sayed Eldin, Ali Akgul
Summary: Annular fin is a mechanical setup used in applied thermal engineering to enhance heat transfer efficiency by increasing the surface area in contact with the surrounding fluid. It is widely used in radiators, power plant heat exchangers, and sustainable energy technologies. This study introduces an efficient annular fin energy model influenced by thermal radiation, magnetic forces, coefficient of thermal conductivity, and heating source, and validates the results with existing data.
SCIENTIFIC REPORTS
(2023)
Article
Multidisciplinary Sciences
Serkan Onar, Kostaq Hila, Sina Etemad, Ali Akguel, Manuel De la sen, Shahram Rezapour
Summary: The aim of this study is to generalize prime vague Gamma-ideals in Gamma-rings by introducing non-symmetric 2-absorbing vague weakly complete Gamma-ideals of commutative Gamma-rings. A novel algebraic structure of a primary vague Gamma-ideal of a commutative Gamma-ring is presented by 2-absorbing weakly complete primary ideal theory. The approach of non-symmetric 2-absorbing K-vague Gamma-ideals of Gamma-rings are examined and the relation between a level subset of 2-absorbing vague weakly complete Gamma-ideals and 2-absorbing Gamma-ideals is given.
Article
Multidisciplinary Sciences
Ali Hasan, Ali Akgul, Muhammad Farman, Faryal Chaudhry, Muhammad Sultan, Manuel De la sen
Summary: This study presents a mathematical model of non-integer order using the fractal fractional Caputo operator to determine the development of Ebola virus infections. The model is constructed and analyzed using incidence data of Ebola virus cases. The study confirms the existence and uniqueness of solutions for Ebola virus infections using the fractional order model, as well as the stability and effects of the virus.
Article
Engineering, Multidisciplinary
Mubashir Qayyum, Amna Khan, Syed Tauseef Saeed, Ali Akgul, Muhammad Bilal Riaz
Summary: Parabolic equations are widely used in various fields such as chemical engineering, vibration theory, particle diffusion, and heat conduction. This article proposes a residual power series algorithm for higher order parabolic equations with variable coefficients in multiple dimensions, which provides closed-form solutions without linearization or perturbation. The algorithm has been tested on homogeneous and non-homogeneous parabolic models, demonstrating its validity and effectiveness for complex scenarios in engineering and sciences.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Physics, Applied
Farrah Ashraf, Romana Ashraf, Ali Akgul
Summary: This paper obtains new exact traveling wave solutions using the Hirota-Ramani equation. It presents many complex solutions for various types of nonlinear partial differential equations (NPDEs) using modified extended direct algebraic approach and new extended direct algebraic method. The analysis focuses on demonstrating the impact of model parameters on soliton behavior.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Computer Science, Artificial Intelligence
Adnan Khan, Muhammad Farman, Ali Akgul
Summary: This research article presents the concept of strong and complete Pythagorean fuzzy soft graphs (PFSGs) and analyzes the various operations associated with them. It also discusses the properties related to these operations and explores the application of PFSGs in decision making.
INTERNATIONAL JOURNAL OF UNCERTAINTY FUZZINESS AND KNOWLEDGE-BASED SYSTEMS
(2023)
Article
Materials Science, Multidisciplinary
Tahir Shahzad, Muhammad Zafarullah Baber, Muhammad Ozair Ahmad, Nauman Ahmed, Ali Akgul, Syed Mansoor Ali, Mubasher Ali, Sayed M. El Din
Summary: The current study investigates a predator-prey model with Holling type II functional response, incorporating prey refuge and diffusion. Such equations are relevant in various fields including biomathematics, biophysics, polymer rheology, agriculture, thermodynamics, blood flow phenomena, aerodynamics, capacitor theory, electrical circuits, electron-analytical chemistry, control theory, and fitting of experimental data. The model is analytically analyzed using a technique called the new extended direct algebraic method (NEDAM). Shock, complex solitary-shock, shock singular, and periodic-singular forms of single and combined wave solutions are observed, and rational solutions emerge during the derivation. The stability of the model is discussed, and unique physical problems are addressed. 3D, 2D, and line graphs are plotted for different parameter values.
RESULTS IN PHYSICS
(2023)
Article
Physics, Multidisciplinary
Kanza Rafaqat, Muhammad Naeem, Ali Akgul, Ahmed M. Hassan, Farah Aini Abdullah, Umair Ali
Summary: This study solves the 2D fractional-order diffusion-wave equation using non-local fractional derivatives and demonstrates its feasibility and practicality through a numerical example.
FRONTIERS IN PHYSICS
(2023)
Article
Mathematics, Applied
Bawar Mohammed Faraj, Shnyar Karim Rahman, Deni Adnan Mohammed, Hozan Dlshad Hilmi, Ali Akgul
Summary: This study presents numerical solutions for initial boundary value problems of Helmholtz equations using difference schemes. The stability of these methods is analyzed, ensuring their reliability and convergence. The proposed schemes' robustness and applicability are demonstrated through examples, confirming their effectiveness and efficiency.
CONTEMPORARY MATHEMATICS
(2023)
Article
Engineering, Multidisciplinary
Romana Ashraf, Farrah Ashraf, Ali Akguel, Saher Ashraf, B. Alshahrani, Mona Mahmoud, Wajaree Weera
Summary: This article obtains solutions of the (3 + 1)-dimensional generalized KdV-ZK equation using the improved modified extended tanh expansion method, and investigates the influence of the magnetic field on weak nonlinear ion-acoustic waves in the field of plasma. The results show that the parameters have different effects on soliton behavior depending on the soliton type.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Mathematics, Interdisciplinary Applications
Nauman Ahmed, Tahira sumbal Shaikh, Muhammed Rafiq, Sayed M. Eldin, Abdul hamid Ganie, Mubasher Ali, Ali Raza, Ilyas Khan, M. I. Khan
Summary: This paper presents the numerical solution of the reaction-diffusion Ebola epidemic model. The inclusion of diffusion in the model allows for a more comprehensive study of disease dynamics. The numerical schemes used aim to preserve the positivity of the solution. Two different techniques, explicit nonstandard finite difference operator splitting (ENSFD-OS) and implicit nonstandard finite difference operator splitting (INSFD-OS), are employed. These schemes maintain the physical features of the state variables and uphold the positivity of the solution. The stability of the steady states in the epidemic model is retained by the suggested approaches. A numerical example and simulations are conducted to validate the proposed techniques.
FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY
(2023)
Article
Mathematics, Applied
Rashid Ali, Ali Akgul
Summary: This study introduces and analyzes a new generalized accelerated overrelaxation method (NGAOR) for solving linear complementarity problems (LCPs), and proves the convergence of the method under certain conditions. Numerical experiments demonstrate the effectiveness and efficiency of the proposed method.
APPLIED MATHEMATICS AND COMPUTATION
(2024)
Article
Engineering, Multidisciplinary
Zia Ullah, Hasan Saeed Qazi, Ahmad Alferidi, Mohammed Alsolami, Badr Lami, Hany M. Hasanien
Summary: This study presents a novel method for optimizing energy trading within microgrids by using a hybrid of particle swarm optimization and gravitational search algorithms. The proposed approach promotes cooperative energy trading among microgrids and the main grid, considering network constraints and the uncertainty of renewable energy. Simulation results show that this method maximizes renewable energy utilization, reduces load burden on the main grid, and significantly decreases energy costs.
ALEXANDRIA ENGINEERING JOURNAL
(2024)
Article
Engineering, Multidisciplinary
Chin Joo Tan
Summary: In this study, the effect of mesh sensitivity on the hole-flanging process was investigated by varying the mesh layouts and punch surface meshing techniques. The results showed that the punch displacement and mesh parameters have significant effects on the wall thickness distributions and forming load profiles. Additionally, calibrating the simulation model's stiffness with the experimental peak load through matching the simulated peak load with the experimental peak under stability conditions was recommended.
ALEXANDRIA ENGINEERING JOURNAL
(2024)
Article
Engineering, Multidisciplinary
Wei-Chao Yang, Lun Zhao, E. Deng, Yi-Qing Ni, Wen Zhao, Yi-Kang Liu, De-Hui Ouyang
Summary: This paper establishes a three-dimensional coupled train-subgrade-wind dynamics model, and investigates the aerodynamic load variation and flow field mechanisms when high-speed trains transit different types of subgrade-cutting transition sections in crosswind conditions. The results indicate that the aerodynamic performance of the train deteriorates in these transition sections, and the aerodynamic load of the head car varies in different operating scenarios.
ALEXANDRIA ENGINEERING JOURNAL
(2024)
Article
Engineering, Multidisciplinary
Shashi Bhushan, Anoop Kumar, Eslam Hussam, Manahil SidAhmed Mustafa, Mohammed Zakarya, Wedad R. Alharbi
Summary: In the sample survey theory, accurate estimation of parameters is essential for survey practitioners. This paper suggests optimal classes of estimators by modifying conventional estimators under stratified ranked set sampling (SRSS). The suggested estimators have been shown to outperform traditional estimators, particularly regression (BLU) estimators, both theoretically and experimentally.
ALEXANDRIA ENGINEERING JOURNAL
(2024)
Article
Engineering, Multidisciplinary
Laila A. Al-Essa, Ahmed A. Soliman, Gamal A. Abd-Elmougod, Huda M. Alshanbari
Summary: In this study, the class of lifetime distributions with bathtub-shaped failure rate functions is examined. Statistical inference methods are used to estimate the parameters of the model, and the Bayesian approach is compared with classical methods. The study also discusses the evaluation of product relative merits based on lifetime duration under a hybrid censoring scheme.
ALEXANDRIA ENGINEERING JOURNAL
(2024)
Article
Engineering, Multidisciplinary
Mohammad Partohaghighi, Marzieh Mortezaee, Ali Akguel, Ahmed M. Hassan, Necibullah Sakar
Summary: The study introduces a new variant of the fractal-fractional diffusion equation using the fractal-fractional operator. It proposes a novel operational matrix technique to solve the equation, transforming it into an algebraic system. The study presents graphical and tabular representations of exact and approximated solutions, along with corresponding errors, and conducts comparative analysis of solutions at specific time points.
ALEXANDRIA ENGINEERING JOURNAL
(2024)
