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
Thermodynamics
Milan K. K. Mondal, Nirmalendu Biswas, Aparesh Datta, Dipak Kumar Mandal, Nirmal K. K. Manna
Summary: An investigation is conducted to study the thermo-fluid flow behavior of Cu/Al2O3-water hybrid nanofluid in a porous enclosure with various half-sinusoidal heating conditions. The study reveals the significant parameters that affect heat transfer, such as frequency, amplitude, modified Rayleigh number, Darcy number, Hartmann number, porosity, and hybrid nanoparticle concentrations. The effect of cooler positions on energy transport is also explored, and the bottom-bottom configuration is found to be the most favorable. The study provides useful correlations for predicting heat transfer characteristics and guiding thermal devices design.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Thermodynamics
Zakaria Korei, Smail Benissaad, Farid Berrahil, Abdelkader Filali
Summary: In this study, the magneto-convection flow in a cavity driven by the lid was investigated using computational fluid dynamics (CFD) techniques. The numerical findings were validated and it was found that the magnetic field orientation, corners radius, and nanoparticle concentration have significant effects on the flow and heat transfer.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Multidisciplinary Sciences
S. E. Ahmed, M. A. Mansour, A. Mahdy
Summary: This study investigates the interaction between two models of heat transfer, surface thermal radiation and natural convection, in micropolar loaded with Al2O3 and Cu nanoparticles within a porous cavity in the presence of MHD of inclination J with entropy analysis. The 2-D steady-state flow governing equations are solved using the Alternating Direction Implicit (ADI) method based on the finite volume method concept. The results show that the average Nusselt number decreases with larger values of the vortex parameter k, while it increases due to the total solid volume fraction phi(phi(Al) + phi(Cu)). In addition, the radiation factor R-d leads to an increase in global entropy generation.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
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
Saeed Aghakhani, Ahmad Hajatzadeh Pordanjani, Masoud Afrand, Ayoob Khosravi Farsani, Nader Karimi, Mohsen Sharifpur
Summary: This paper presents a thermodynamic analysis of a mini circular heatsink, investigating different types of heatsinks and their performance. The results show that copper heatsinks have better cooling performance than aluminum heatsinks. Additionally, the study found that the addition of nanoparticles to the working fluid has a minimal impact on the thermodynamic performance of the system. Increasing the Reynolds number of the fluid flow reduces the exergy losses and improves the first and second law efficiencies.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
P. Gokulavani, M. Muthtamilselvan, Bahaaeldin Abdalla
Summary: The study investigates convection in a porous open enclosure with a center heated baffle, where water-based Cu-TiO2 hybrid nanofluid is used for cooling. The non-dimensional governing equation is solved numerically using finite difference method. The analysis shows that heat transfer dominates entropy generation, and suction process enhances buoyancy through Ra.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Mathematics
Aissa Abderrahmane, Naef A. A. Qasem, Obai Younis, Riadh Marzouki, Abed Mourad, Nehad Ali Shah, Jae Dong Chung
Summary: The study conducted numerical simulations of mixed convective heat transfer in a three-dimensional triangular enclosure with a revolving circular cylinder, and provided recommendations for parameter values to enhance heat transfer rates in this system.
Article
Thermodynamics
Nirmal K. Manna, Nirmalendu Biswas, Dipak Kumar Mandal, U. K. Sarkar, Hakan F. Oztop, Nidal Abu-Hamdeh
Summary: This study systematically assesses the impacts of heater and cooler positions in four different quadrantal cavities using hybrid nanofluid and oriented magnetic fields. The analysis considers heat transfer characteristics, entropy generation, and the effects of variables like Rayleigh number, Hartmann number, and volumetric concentration. The study reveals that the mutual exchange of heater-cooler positions does not affect the flow direction, but sidewall plays a role in the formation of circulation vortex. The Lorentz force moderates the heat transfer process, and thermal entropy production is the main driver of thermodynamic irreversibility.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2023)
Article
Thermodynamics
Rashmi Agrawal, Pradeep Kaswan
Summary: This paper examines the squeezing flow of hybrid nanofluid within two parallel disks. The study analyzes entropy generation by using the second law of thermodynamics and estimates the behavior of a porous medium using Darcy's model. The influences of viscous dissipation, Joule heating, and thermal radiation are also taken into account. The findings show that the hybrid nanofluid enhances heat transfer compared to nanofluid, and the average Nusselt number and entropy generation are affected by magnetic field, porosity, and Brinkman number. The study also demonstrates that the combination of silver and magnetite nanoparticles improves entropy generation performance in the water-ethylene glycol base fluid.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2023)
Article
Computer Science, Interdisciplinary Applications
M. Vijatha, P. Bala Anki Reddy
Summary: In this study, the effect of entropy generation on a Casson hybrid nanofluid over a stretching cylinder in the presence of linear thermal radiation and Cattaneo-Christov heat flux is investigated. Fe2O3 and Fe3O4 are assumed as nanoparticles suspended in the blood's basic fluid, which can improve the accuracy and efficiency of tumor therapy.
INTERNATIONAL JOURNAL OF MODERN PHYSICS C
(2023)
Article
Engineering, Multidisciplinary
Amjad Salamah M. Aljaloud
Summary: The aim of this study is to investigate the effect of barrier temperature on hybrid nanofluid MHD mixed convection via LBM. By changing the blocking temperature, the share of heat transfer in entropy production can be reduced by about 14%. Increasing buoyancy forces leads to stronger convection currents inside the chamber. The application of a magnetic field reduces fluid flow speed and temperature gradient, weakening convection effects and buoyancy forces.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Physics, Multidisciplinary
P. Sudarsana Reddy, P. Sreedevi
Summary: In this study, numerical investigation was conducted on the entropy generation, flow, and heat transport features of a hybrid nanofluid, with copper and silver nanoparticles suspended in Ethylene Glycol as the common fluid. The study explored the effects of various parameters on the scatterings of isotherms, streamlines, and entropy generation through graphs, showing that silver nanoparticles have a lower temperature gradient than copper nanoparticles. The results also indicated different rates of heat transfer enhancement for silver and copper nanoparticles suspended in the base fluid.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Mechanics
Dipak Kumar Mandal, Nirmalendu Biswas, Nirmal K. Manna, Dilip Kumar Gayen, Rama Subba Reddy Gorla, Ali J. Chamkha
Summary: In this work, the numerical exploration of thermofluidic transport process in an M-shaped enclosure filled with permeable material and suspended with Al2O3-Cu hybrid nanoparticles is conducted. The impact of geometric parameters on thermal performance is analyzed, and an artificial neural network technique is implemented for prediction. The results reveal the importance of sidewall inclination and top triangular undulation in modulating thermo-flow physics.
Article
Thermodynamics
Raouf Khosravi, Saeed Rabiei, Mohammad Khaki, Mohammad Reza Safaei, Marjan Goodarzi
Summary: This study analyzes the performance of graphene-platinum/water hybrid nanofluid flow in a cylindrical microchannel heat sink using the second law of thermodynamics. Increasing factors such as wave amplitude, nanoparticle concentration, and Reynolds number leads to a decrease in thermal entropy generation rate while frictional entropy increases. The Bejan number was found to be greater than 0.98 in all cases, indicating that irreversibility mainly results from thermal entropy generation. Evidently, increasing input variables reduces the thermal entropy generation rate. Additionally, an artificial neural network model was developed to predict entropy generation based on factors like wave amplitude, nanofluid concentration, and Reynolds number.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Materials Science, Multidisciplinary
Deep Chatterjee, Nirmalendu Biswas, Nirmal K. Manna, Dipak Kumar Mandal, Ali J. Chamkha
Summary: This study investigates the effect of magnetic field and conducting cylindrical obstruction on heat transfer and entropy generation in a cylinder-embedded annular thermal system. It is found that the size of the obstruction significantly affects the thermal-flow behavior, and the distribution of heatlines and streamlines depends on the obstruction size and magnetic field orientation.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Mechanics
Joy Mandal, Deep Chatterjee, Sandip Sarkar
Summary: We numerically investigated the effect of electrohydrodynamics on a non-Newtonian droplet pair suspended in a Newtonian medium. The leaky dielectric model was used to study the response of emulsion drops in an externally applied electric field. The study found that the droplet deformation and net motion varied depending on the electrical permittivity ratios and different fluid behaviors of the drops. The results provide insights into the behavior of nonlinear fluids under an electric field.
Article
Engineering, Mechanical
Rosaria Del Toro, Maria Laura De Bellis, Marcello Vasta, Andrea Bacigalupo
Summary: This article presents a multifield asymptotic homogenization scheme for analyzing Bloch wave propagation in non-standard thermoelastic periodic materials. The proposed method derives microscale field equations, solves recursive differential problems within the unit cell, establishes a down-scaling relation, and obtains average field equations. The effectiveness of this approach is validated by comparing dispersion curves with those from the Floquet-Bloch theory.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Yue Bao, Zhengcheng Yao, Yue Zhang, Xueman Hu, Xiandong Liu, Yingchun Shan, Tian He
Summary: This paper proposes a novel triple-gradient phononic acoustic black hole (ABH) beam that strategically manipulates multiple gradients to enhance its performance. The study reveals that the ABH effect is not solely brought about by the thickness gradient, but also extends to the power-law gradients in density and modulus. The synergistic development of three different gradient effects leads to more pronounced and broader bandgaps in PCs.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Matthias Ryser, Jason Steffen, Bekim Berisha, Markus Bambach
Summary: This study investigates the feasibility of replacing complex experiments with multiple simpler ones to determine the anisotropic yielding behavior of sheet metal. The results show that parameter identifiability and accuracy can be achieved by combining multiple specimen geometries and orientations, enhancing the understanding of the yield behavior.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Wenjun Li, Pengfei Zhang, Siyong Yang, Shenling Cai, Kai Feng
Summary: This study presents a novel two-dimensional non-contact platform based on Near-field Acoustic Levitation (NFAL), which can realize both one-dimensional and two-dimensional transportation. Numerical and experimental results prove the feasibility and ease of this method.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Shuo Liu, Lu Che, Guodong Fang, Jun Liang
Summary: This study presents a novel lamina conjugated bond-based peridynamic (BB-PD) model that overcomes the limitations of material properties and is applicable to composite laminates with different stacking sequences. The accuracy and applicability of the model are validated through simulations of elastic deformation and progressive damage behavior, providing an explanation of the damage modes and failure mechanisms of laminated composite materials subjected to uniaxial loading.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Omar El-Khatib, S. Kumar, Wesley J. Cantwell, Andreas Schiffer
Summary: Sandwich-structured honeycombs (SSHCs) are hierarchical structures with enhanced mass-specific properties. A model capable of predicting the elastic properties of hexagonal SSHCs is presented, showing superior in-plane elastic and shear moduli compared to traditional honeycombs, while the out-of-plane shear moduli are reduced.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Zhi-Jian Li, Hong-Liang Dai, Yuan Yao, Jing-Ling Liu
Summary: This paper proposes a process-performance prediction model for estimating the yield strength and ultimate tensile strength of metallic parts fabricated by powder bed fusion additive manufacturing. The effect of main process variables on the mechanical performance of printed metallic parts is analyzed and the results can serve as a guideline for improvement. The accuracy of the proposed model is validated by comparison with literature.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Saman A. Bapir, Kawa M. A. Manmi, Rostam K. Saeed, Abdolrahman Dadvand
Summary: This study numerically investigates the behavior of an ultrasonically driven gas bubble between two parallel rigid circular walls with a cylindrical micro-indentation in one wall. The primary objective is to determine the conditions that facilitate the removal of particulate contamination from the indentation using the bubble jet. The study found that the bubble jet can effectively remove contamination from the indentation for certain ranges of indentation diameter, but becomes less effective for larger indentation diameters.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
E. Polyzos, E. Vereroudakis, S. Malefaki, D. Vlassopoulos, D. Van Hemelrijck, L. Pyl
Summary: This research investigates the elastic and damage characteristics of individual composite beads used in 3D printed composites. A new analytical probabilistic progressive damage model (PPDM) is introduced to capture the elastic and damage attributes of these beads. Experimental results show strong agreement with the model in terms of elastic behavior and ultimate strength and strain.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
