Article
Thermodynamics
L. Syam Sundar, Solomon Mesfin, E. Venkata Raman, V. Punnaiah, Ali J. Chamkha, Antonio C. M. Sousa
Summary: The study demonstrates that using hybrid nanofluids with coiled wire inserts in a tube can significantly enhance heat transfer performance and reduce thermal entropy generation, thereby increasing the exergy efficiency of water flow.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
S. Shaheen, K. Maqbool, R. Ellahi, Sadiq M. Sait
Summary: This study investigates the impact of heat transfer on the flow of tangent hyperbolic nanofluid in a ciliated tube, exploring its benefits for embryology research and medical experts. It highlights the use of nanoparticles in removing cysts from the fallopian tube and the reduction of entropy generation due to ciliary movement. The research discusses the optimization of energy through heat transfer and the influence of various parameters on velocity, temperature, and entropy generation in the system.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Engineering, Multidisciplinary
Saeid Mir, Azher M. Abed, Omid Ali Akbari, Anoushiravan Mohammadian, Davood Toghraie, Ali Marzban, Sajad Mir, Farnaz Montazerifar, Reza Bemani, Ghassan Fadhil Smaisim
Summary: The heat transfer behavior and flow characteristics of Ag/water two-phase laminar nanofluid as a cooling fluid were simulated using the finite volume method. The simulations considered different volume fractions of nanoparticles and Reynolds numbers, as well as a tube with a curvature angle of 270 degrees. The results showed that the addition of solid nanoparticles resulted in periodic behavior in the axial velocity profile, with maximum and minimum values shifting every 60 degrees. The study also revealed that the local friction factor increased significantly after a curvature angle of 30 degrees, due to fluid motion, centrifugal forces, and hydrodynamic field.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Mehdi Bahiraei, Mohammad Naseri, Ali Monavari
Summary: The study reveals that nanoparticle shape has an impact on the entropy generation rate in a heat exchanger, with platelet-shaped nanoparticles showing the highest entropy production in the hot fluid and Os-shaped particles exhibiting the highest thermal and frictional entropy production in the cold fluid.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
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
Mathematics, Applied
Sajjad Sarvar-Ardeh, Roohollah Rafee, Saman Rashidi
Summary: When designing microscale heat exchangers, methods such as using nanofluids and convergent walls can help reduce energy dissipation and improve system performance. This study investigates the hydrothermal performance and entropy generation of alumina-silica/water hybrid nanofluid in a double-layer tapered microchannel using three-dimensional simulation. The results show that using a convergent microchannel can decrease surface temperature and temperature gradient, and changing the volumetric fraction of nanoparticles and tapered factor affects the thermal resistance and pumping power of the system.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2023)
Article
Thermodynamics
H. B. Marulasiddeshi, Praveen Kumar Kanti, S. B. Prakash, S. N. Sridhara
Summary: This research investigates the thermohydraulic behavior and thermodynamic irreversibility rate of water-based Al2O3 and Al2O3 + CuO hybrid nanofluid in a circular copper tube under a constant heat flux. The study analyzes the thermophysical characteristics, Nusselt number, entropy generation number, and friction factor of the nanofluids at different concentrations and Reynolds numbers. The findings demonstrate the potential of Al2O3 + CuO hybrid nanofluids as alternative cooling fluids for thermal systems.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Metallurgy & Metallurgical Engineering
Faraz Afshari, Adnan Sozen, Ataollah Khanlari, Azim Dogus Tuncer
Summary: The study successfully utilized nanofluid in a shell and tube heat exchanger, increasing thermal energy without adding significant pressure drop. The highest heat transfer rate enhancement of 19.1% was achieved using Fe2O3/water nanofluid with a volume fraction of 2%.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2021)
Article
Energy & Fuels
Nima Mazaheri, Mehdi Bahiraei
Summary: The study investigated the energy, exergy, and hydrodynamic characteristics of using boehmite alumina nanofluid in a spiral heat exchanger with five different nanoparticle shapes. It was found that higher volume fractions of nanofluid enhanced heat exchange amount, overall heat transfer coefficient (U), and effectiveness. Different nanoparticle shapes had varying effects on thermal efficiency and energy efficiency, with platelet-shaped nanoparticles performing best at constant Re and oblate spheroid-shaped nanoparticles being recommended for energy efficiency perspective.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2021)
Article
Engineering, Multidisciplinary
Dan Wang, Masood Ashraf Ali, Kamal Sharma, Sattam Fahad Almojil, As'ad Alizadeh, Abdulrhman Fahmi Alali, Abdulaziz Ibrahim Almohana
Summary: The research aims to improve the thermal performance of heat exchangers and simulate the operation of Al2O3-CuO-water nanofluid in a 3D shell-and-tube heat exchanger using computational fluid mechanics techniques. The results show that the nanofluid, turbulator, and high Reynolds number have a significant impact on increasing the thermal performance. The application of nanofluids can reduce environmental damage, energy consumption, and emissions.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Thermodynamics
Sumit Kr. Singh, Jahar Sarkar
Summary: Experimental studies show that the use of hybrid nanofluid and different shapes of twisted tape inserts can improve heat transfer and pressure drop characteristics, with Nusselt number and friction factor increasing with decreasing twisting ratio, increasing depth ratio, decreasing width ratio, and decreasing nanofluid inlet temperature.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Sangram Kumar Samal, Manoj Kumar Moharana
Summary: This study numerically investigates the thermo-hydraulic and entropy generation characteristics of water-based graphene-silver hybrid nanofluid in a recharging microchannel. The results show that using the hybrid nanofluid enhances heat transfer performance but also increases pressure drop and pumping power requirements.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Engineering, Chemical
B. Saleh, L. Syam Sundar
Summary: Experimental results show that the addition of nanodiamond+Fe3O4 hybrid nanofluids can significantly increase thermal conductivity and viscosity, thereby improving heat transfer efficiency. Under the conditions of 0.2% particle loading and 60 degrees Celsius, the entropy generation and exergy efficiency of the hybrid nanofluids are significantly increased.
Article
Engineering, Mechanical
Amin Shahsavar, Peyman Farhadi, Cagatay Yildiz, Matin Moradi, Muslum Arici
Summary: This study explores the entropy generation characteristics of different nanoparticle shapes in a nanofluid-cooled helical heat sink system. In turbulent flow, the thermal entropy generation decreases with increasing particle volume fraction, while the frictional entropy generation increases. Spherical particles have the smallest impact on entropy generation.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Thermodynamics
Pongjet Promvonge, Sompol Skullong
Summary: This study investigates the thermohydraulic performance, flow friction, and entropy generation analysis of a heated tube with louvered winglet tape inserts. The results show that different louver angles and pitch ratios have a significant impact on heat transfer rates and friction losses. Decreasing Reynolds number, pitch ratio, and louver angle can reduce entropy generation.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Review
Energy & Fuels
Fateh Mebarek-Oudina, Ines Chabani
Summary: Phase change materials (PCMs) have attracted the attention of scientists due to their value in minimizing energy consumption and expanding heat storage, but several challenges have hindered research in this area. This paper summarizes the use of nano-enhanced PCMs to overcome these constraints, discussing their motivation, advantages, applications, and impact on thermal management and storage equipment. Recent studies have shown that nanoparticles can greatly improve the thermo-physical properties of PCMs, leading to significant positive effects in terms of thermal concepts at various levels. Nano-enhanced PCMs are now capable of storing and releasing large amounts of heat in short periods of time, benefiting thermal storage systems and increasing overall efficiency in various applications.
Article
Chemistry, Multidisciplinary
G. Dharmaiah, Fateh Mebarek-Oudina, M. Sreenivasa Kumar, K. Chandra Kala
Summary: This paper investigates the impact of non-linear thermal radiation, Brownian motion, and thermophoresis on an MHD through a wedge for Jeffrey fluid. The study also includes heat transport analysis. The originality of this work lies in the formulation of the Jeffrey fluid, as well as the consideration of nonlinear thermal radiation, Brownian motion, and thermophoresis. Using boundary layer approximations and similarity transformations, the governing equations are transformed into ordinary differential form. The outcomes of velocity, concentration, and temperature fields are determined using the BVP4C numerical method, and the results are analyzed graphically and tabularly. The comparison with previously published data shows a good agreement. The research mainly focuses on modeling flow in a nuclear reactor, where the boundary layer flow caused by a wedge surface is crucial for geothermal and heat exchanger systems.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2023)
Article
Physics, Applied
F. Mebarek-Oudina, Preeti, A. S. Sabu, H. Vaidya, R. W. Lewis, S. Areekara, A. Mathew, A. I. Ismail
Summary: This study numerically evaluates the hydromagnetic flow of a magnetite-water nanofluid induced by a rotating stretchable disk. The Buongiorno model is used to model the nanofluid flow, considering the volume fraction-dependent effective properties and slip mechanisms. Experimentally obtained functions of effective viscosity and thermal conductivity are also employed. The transformed first-order ODEs are solved using the Runge-Kutta algorithm and the shooting technique. The impact of relevant terms on the nanoliquid temperature and concentration is explained using graphs. The findings have important applications in various fields such as spin coating, rotating disk reactors, storage devices, food processing, and heat exchangers.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Thermodynamics
Asgar Ali, Fateh Mebarek-Oudina, Alok Barman, Sanatan Das, A. I. Ismail
Summary: The research aims to investigate the phenomena of the electric double layer (EDL) near the peristaltic wall and its impact on the peristaltic transport of ionized non-Newtonian blood infused with hybridized copper and gold nanoparticles in a ciliated micro-vessel, under the influence of buoyancy and Lorentz forces. The study utilizes the homotopy perturbation approach to obtain optimal series solutions for the flow equations and analyzes the changes in hemodynamic characteristics using graphical designs. The findings indicate that a higher electric body force and thinner EDL significantly impede the blood flow near the ciliated micro-vessel wall, and the heat exchange rate is evaluated for different types of hybrid nano-blood. The simulation can contribute to the design of electro-osmotic blood pumps, diagnostic devices, and pharmacological systems.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Acoustics
Shelly Priyanka, Shelly Arora, Fateh Mebrek-Oudina, Saroj Sahani
Summary: An improved collocation technique is proposed for discretizing the fourth-order multi-parameter non-linear Kuramoto-Sivashinsky (K-S) equation. Quintic Hermite splines are used to discretize the spatial direction, while a weighted finite difference scheme is used to discretize the temporal direction. The fourth-order equation in space direction is decomposed into second-order using space splitting, and the proposed equation is analyzed on a uniform grid in both space and time directions. Error bounds are established for general order Hermite splines, and stability analysis is discussed in detail. Periodic and non-periodic problems of K-S equation type are studied, and error growth is addressed by computing L2-norm and L∞-norm.
Article
Mathematics
A. I. Ismail, T. S. Amer, W. S. Amer
Summary: This paper focuses on modifying the large parameter approach for estimating the periodic solutions of two degrees-of-freedom quasi-linear systems with a first integral, and compares it with previous approaches.
Article
Nanoscience & Nanotechnology
N. Ghoudi, F. Mebarek-Oudina, M. Bouabid, R. Choudhari, M. Magherbi
Summary: This study examines the heat transport and entropy production of non-Newtonian fluid flow, and investigates the influence of various factors on entropy production. By solving the governing equations using COMSOL software, it is found that the parameters have a significant impact on entropy production. Thermal entropy generation is maximized at low power law index and high Reynolds number, while the effect of Reynolds number becomes insignificant at relatively high power law index.
JOURNAL OF NANOFLUIDS
(2023)
Article
Acoustics
T. S. Amer, A. I. Ismail, W. S. Amer
Summary: This work analytically studies a two DOF dynamical system using the MSA. Solvability requirements and resonance states are obtained, and stability and instability states are identified using RH criteria. The curves of resonance and system behavior during motion are plotted and analyzed. Numerical solutions using the Runge-Kutta fourth-order method are compared with analytical solutions, proving the accuracy of the MSA. Stability zones are studied to determine the positive effects of different parameters on motion.
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2023)
Article
Acoustics
A. I. Ismail, T. S. Amer, W. S. Amer
Summary: This study investigates the motion of Lagrange's gyro around its fixed point under the influence of perturbed torque, gyroscopic torque, and varied restoring torque. The gyro equations for motion are formulated as a two-degrees-of-freedom autonomous system, assuming small angular velocity components and a greater restoring torque compared to the perturbing torque. The study explores periodic solutions and geometric interpretation of the motion using a large parameter. Numerical analysis is conducted to evaluate the techniques used and examine the impact of changing motion parameters on gyro behavior.
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2023)
Article
Acoustics
Abdelaziz I. Ismail, Tarek S. Amer, Wael S. Amer
Summary: In this study, advanced investigations and treatments for the problem of a restricted vibrating motion of a connected gyrostat with a spring are presented. The gyrostat is assumed to spin slowly about the minor or major principal axis of the inertia ellipsoid and is acted upon by a gyrostatic couple vector. The approach of the large parameter is applied to obtain periodic solutions for the equations of motion. A geometric illustration using Euler angles is given to evaluate and analyze the gyrostatic motion, and numerical data and computer programs are used for analysis. The novelty of this work lies in the imposition of a new initial condition and the use of the large parameter technique to obtain solutions in a new domain.
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2023)
Article
Chemistry, Physical
G. Dharmaiah, Fateh Mebarek-Oudina, J. L. Rama Prasad, Ch. Baby Rani
Summary: Research in the fields of thermal and process engineering is growing due to the broad relevance and dynamic applications of nanoparticles. Nanomaterials, with their exceptional thermal and physical characteristics, have the potential to make remarkable contributions in various areas. The combination of nanoparticles and microbes in a solution can significantly improve the thermal efficiency of heat transfer phenomena. Nanofluid flow has numerous potential uses, including electronic device storage, industrial framework cooling and heating, and pharmaceutical governance.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Acoustics
I Abdulaziz, Aya Ismail, Omar Abdulaziz
Summary: This article studies a rotary motion and discusses several examples of this motion. It proposes approximate and high-frequency analytic solutions for the slow rotational motion of a high-frequency disc. The application of this motion in gyroscope dynamics, industrial engineering, astrophysics, and other fields is explored.
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2023)