Article
Thermodynamics
Sohail Nadeem, Rabia Salma, Naeem Ullah, Jehad Alzabut, Hassan Ali Ghazwani
Summary: This study numerically investigates the steady mixed convection flow in a square wavy cavity containing heated corrugated rods. The results show that the temperature and streamlines are influenced by different Rayleigh numbers, Hartmann numbers, and numbers of undulations and amplitudes of the wavy wall and corrugated rod. Additionally, this study has important implications for various practical applications.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Babar Iftikhar, Tariq Javed, Muhammad Siddiqui
Summary: This study analyzed the magnetohydrodynamic (MHD) natural convection flow of couple-stress fluid and entropy generation inside a cavity with a heated fin using the Galerkin finite element method. The results showed that the flow intensity and heatlines decreased with increasing the couple-stress parameter. It was also found that the entropy generation and heat transfer rate increased with increasing the fin height.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Thermodynamics
Zafar Hayat Khan, Waqar Ahmad Khan, Muhammad Hamid
Summary: This study numerically investigates the heat transfer characteristics of free convection of Casson fluid inside a square cavity with Y-shaped fin, demonstrating that the presence of Y-shaped fin can enhance heat transfer efficiency along the bottom surface.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Mechanics
Vimal Kishor, Suneet Singh, Atul Srivastava
Summary: Non-intrusive investigation was conducted on the dependence of buoyancy-driven flow instabilities on the orientation angle of a differentially heated cavity with an aspect ratio of three. Spectral analysis revealed that changing the cavity orientation angle led to different flow instabilities. The study utilized interferometric measurements and smoke visualization to map the convective flow field and explain the dependency of flow instabilities on cavity orientation angle.
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
Physics, Multidisciplinary
Y. Khan, Rashid Mahmood, Afraz Hussain Majeed, Sadia Irshad, A. Alameer, N. Faraz
Summary: This article numerically investigates the combined convection flows in a cavity with a square cylinder at the center, examining the impact of different parameters on the flow characteristics.
FRONTIERS IN PHYSICS
(2022)
Article
Thermodynamics
Yang Liu, Shuaikun Zhang
Summary: The flow and heat transfer in a differentially heated convective cavity with a conducting thin fin are investigated using numerical simulations. The results show that plume flow separates intermittently from the fin and causes strong oscillations in the vertical thermal boundary layer. The origin and development of the plume flow, as well as the interaction between the plume and the vertical boundary layer, are influenced by the Rayleigh number and fin length. Heat transfer across the cavity increases with fin length, but heat transfer through the heated sidewall is depressed compared to a non-finned cavity.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Naeem Ullah, Sohail Nadeem, Arif Ullah Khan
Summary: Numerical simulations were conducted to investigate natural convection in a rectangular cavity containing CuO-water nanofluid. The results showed that thermal distribution and flow field became stronger with increasing Rayleigh numbers and wavelength numbers. The increase in nanoparticle volume fraction was found to enhance heat transfer rate due to dominant convection.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
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
Thermodynamics
Muhammad Usman, Muhammad Hamid, Zafar Hayat Khan, Rizwan Ul Haq, Waqar Ahmed Khan
Summary: The study demonstrates that both horizontal and vertical velocity components increase with the length of the heating element, while the dimensionless temperature decreases in the heating domain. It is observed that a 10% increase in the volume fraction of ferroparticles increases Nusselt number by more than 12%, and a 20% increase leads to over 30% enhancement, depending on the length of the heating element. This study highlights the importance of magnetic nanoparticles in enhancing heat transfer rate in a triangular cavity.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2021)
Article
Engineering, Multidisciplinary
Imtiaz Ali Shah, Sardar Bilal, Ali Akgul, Mohamed Omri, Jamel Bouslimi, Noor Zeb Khan
Summary: The selection of appropriate geometrical characteristics of enclosure has a significant impact on the performance of thermal engineering processes and devices. This study investigates the thermal characteristics of power-law liquids and analyzes the influence of physical parameters on heat transfer.
ALEXANDRIA ENGINEERING JOURNAL
(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
A. Chauhan, P. M. Sahu, C. Sasmal
Summary: This study investigates the influence of adding polymer molecules into a Newtonian solvent on natural convection heat transfer in a differentially heated square cavity. The results show that the Nusselt number is related to the Weissenberg number, polymer extensibility parameter, and polymer viscosity ratio, with different behaviors observed at low and high Rayleigh numbers. The study also presents a simple correlation for the average Nusselt number, which can be applied to interpolate results in new applications.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
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
Physics, Multidisciplinary
Ferhat Koca, T. Burak Guder
Summary: The fact that modern computers transmit excessive information leads to heat concentration, damaging processors and reducing performance. This study examines the impact of circular, square, and triangular fins on heat transfer performance. The results indicate that the circular finned model performs best at Reynolds numbers between 5000 and 6500.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Engineering, Multidisciplinary
Mian Muhammad Farooq, Muhammad Mohsin, Muhammad Farman, Ali Akgul, Muhammad Umer Saleem
Summary: This paper introduces a nested modeling method for complex nested structures. By generalizing the method of generating continuous distribution, various special distributions can be generated, providing solutions for complex systems. Additionally, new distributions are developed and their important properties are discussed.
INTERNATIONAL JOURNAL OF NONLINEAR SCIENCES AND NUMERICAL SIMULATION
(2023)
Article
Engineering, Electrical & Electronic
Zeric Tabekoueng Njitacke, Jan Awrejcewicz, Adelaide Nicole Kengnou Telem, Theophile Fonzin Fozin, Jacques Kengne
Summary: In this study, a new configuration involving the coupling of a 2D Fitzhugh-Nagumo (FN) neuron with a 3D Hindmarsh-Rose (HR) neuron via a memristive synapse is investigated. The self-excited dynamics of the coupled neurons is revealed after analyzing the equilibria of the model. Resting activity, periodic spikes, periodic and chaotic bursts are found during the numerical investigation of the model. The coupled neurons display the rare phenomenon of homogeneous extreme multistability, where an infinite number of firing activities of the same nature but located at different levels in the phase space coexist. The selection of desired electrical activity dynamics is also emphasized through a noninvasive control scheme. An electronic circuit of the coupled neuron is designed and investigated to support the obtained results.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Engineering, Electrical & Electronic
Shafiq Ahmad, Salman, Aman Ullah, Shabir Ahmad, Ali Akgul
Summary: This paper focuses on new optical soliton solutions of a nonlinear Schrodinger equation with self-frequency shift and Kerr nonlinearity terms. The extended version of the modified tanh expansion technique associated with new Riccati solutions is utilized. Optical soliton solutions such as dark and bright optical solitons, breathers type, periodic and hybrid type optical soliton solutions are extracted. All the solutions are displayed with the help of Mathematica in 2D and 3D graphs.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Mathematics, Interdisciplinary Applications
Larysa Dzyubak, Oleksandr Dzyubak, Jan Awrejcewicz
Summary: This study generalized a model for non-linear multi-scale diffusion cancer invasion to incorporate response delay in biological systems. The model was based on the Masing-Bouc-Wen framework with additional state variables to simulate memory. Chaotic attractors were quantified using wandering trajectories analysis. A comparison of the conditions leading to cancer invasion for the generalized model with and without memory is presented.
CHAOS SOLITONS & FRACTALS
(2023)
Article
Physics, Applied
M. A. Basit, Madeeha Tahir, Ayesha Riasat, S. A. Khan, Muhammad Imran, Ali Akguel
Summary: Nanofluids have diverse applications and effective thermal properties, making them valuable in heat transfer, energy production, and biomedicine. This study developed a mathematical model to understand the heat and mass transport behavior of swimming motile organisms in the presence of various factors. The model was solved using MATLAB and the results were compared with a Newtonian fluid. The effects of different parameters on the governing equations were discussed and visualized graphically.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Multidisciplinary Sciences
Sobia Noreen, Umar Farooq, Hassan Waqas, Nahid Fatima, M. S. Alqurashi, Muhammad Imran, Ali Akguel, Abdul Bariq
Summary: Heat and mass transfer play important roles in various technical and commercial operations. This research focuses on using the Cattaneo-Christov heat flux model to study the flow of ternary hybrid nanofluid through double discs. The heat source and magnetic field are included in the mathematical model, which is solved using computational techniques. The results show the effects of key factors on velocity, temperature, and nanoparticles concentration.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Multidisciplinary
Mubashir Qayyum, Qursam Fatima, Syed Tauseef Saeed, Ali Akgul, Wajaree Weera, Wedad R. Alharbi
Summary: In this paper, an extended residual power series method (RPSM) is proposed to solve ordinary differential equations with boundary conditions. The reliability of the proposed methodology is tested by comparing the results with other schemes for different boundary value problems (BVPs). The analysis shows that the extended approach can handle BVPs easily and provide a convergent series solution without the need for discretization, perturbation, or linearization. Therefore, RPSM is a better choice for scientists and researchers working in various fields of engineering and sciences.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Mathematics, Interdisciplinary Applications
Basem Al Alwan, Muhammad Abu Bakar, Waqas Ali Faridi, Antoniu-Claudiu Turcu, Ali Akgul, Mohammed Sallah
Summary: This paper examines and analyzes the generalized Calogero-Bogoyavlenskii-Schiff equation (GCBSE). The equation has several applications in plasma physics and soliton theory, providing forecasts for soliton wave propagation profiles. By transforming the model into an ordinary differential equation using the next traveling wave transformation, analytically exact solitons are obtained. The new extended direct algebraic technique and modified auxiliary equation method are applied to the GCBSE to obtain novel and generalized analytical wave solutions, including various soliton families. The propagation of the soliton solution is graphically presented in contour, 2D, and 3D visualization to demonstrate the impact of the wave number on the obtained traveling wave structures.
FRACTAL AND FRACTIONAL
(2023)
Article
Mathematics, Interdisciplinary Applications
Mubashir Qayyum, Aneeza Tahir, Syed Tauseef Saeed, Ali Akguel
Summary: The field of fuzzy calculus is a powerful mathematical tool for dealing with uncertainties and impressions in real-world situations. This study focuses on the analysis of (������ + 1)-dimensional fractional Fisher equations (FFEs) in a fuzzy environment, providing semi-analytical solutions by considering the Caputo-gH fractional derivative. The obtained results are validated and shown to be improved compared to existing literature.
CHAOS SOLITONS & FRACTALS
(2023)
Article
Chemistry, Physical
Zeric Tabekoueng Njitacke, Gokul Sriram, Karthikeyan Rajagopal, Anitha Karthikeyan, Jan Awrejcewicz
Summary: In order to reduce the cost of implementing the traditional 2D FHN neuron circuit, a pair of diodes connected in an anti-parallel direction was used instead of the usual cubic nonlinearity implemented with two multipliers. The stability of the model justifies the generation of self-excited firing patterns. Utilizing the Helmholtz theorem, a Hamilton function is provided to estimate the energy released during each electrical activity of the model. The investigation of the 1D evolution of the maxima of the membrane potential of the model reveals a period of doubling bifurcation followed by a crisis that increases the volume of the attractor. The obtained results are validated through the realization of a neural circuit without analog multipliers.
EUROPEAN PHYSICAL JOURNAL E
(2023)
Article
Physics, Multidisciplinary
Nasser A. Saeed, Jan Awrejcewicz, Osama M. Omara, Lei Hou, Mohamed Sharaf
Summary: This study investigates static bifurcation control and vibration reduction of a two-degree-of-freedom dynamical system. A novel control strategy combining two first-order filters effectively eliminates dangerous bifurcation characteristics and induces the nonlinear rotor to exhibit a response like a linear system with minimal vibration amplitudes. The findings are important for enhancing the stability of rotating machinery and suppressing undesirable vibrations.
Article
Materials Science, Multidisciplinary
Aizaz Khan, Emad E. Mahmoud, Iftikhar Ahmad, Sayed M. El Din, Bakht Amin Bacha, Ali Akgul
Summary: In this manuscript, the Goos-Hanchen shift of the transmitted and reflected probe beam is controlled and modified by introducing the position and orbital angular momentum dependency in the Rabi frequencies of the control fields. The system parameters and azimuthal quantum number are used to control and modify the G-H shift as well as the topological regions. Crater and peak type topological regions are reported in the G-H shift of the reflected and transmitted beam. The modified results might have significant applications in optical waveguide switches and sensors.
RESULTS IN PHYSICS
(2023)
Article
Multidisciplinary Sciences
Boubekeur Gasmi, Alaaeddin Moussa, Yazid Mati, Lama Alhakim, Ali Akguel
Summary: This paper presents a new method called the Cham method for solving nonlinear partial differential equations (NLPDEs), which can generate eight families of solutions. It is successfully applied to solve the (2+1)-dimensional Bogoyavlenskii's breaking soliton equations. The dynamic behavior of these equations and the bifurcation of traveling waves are discussed, and graphical solutions corresponding to different coefficient values are depicted.
JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Wenjie Lu, Umar Farooq, Muhammad Imran, Wathek Chammam, Sayed M. El Din, Ali Akgul
Summary: Hybrid nanofluids, which combine nanoparticles with base fluids, outperform traditional nanofluids in heat transmission and have a wide range of applications in bioengineering and electricity. This study investigates the numerical simulation of water-based dual nature nanofluid flow and heat transfer, using silver and copper oxide nanoparticles. The results show that hybrid nanofluid has superior thermal characteristics and its performance can be influenced by various parameters such as Darcy-Forchheimer and curvature.
NANOTECHNOLOGY REVIEWS
(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)
