Article
Thermodynamics
Md Insiat Islam Rabby, Muhammad Ali Rob Sharif, Farzad Hossain
Summary: This study investigates heat transfer in corrugated pipes carrying hybrid nanofluid. The results show that the corrugations considerably enhance the heat transfer. As the Reynolds number and nanoparticle concentration increase, the heat transmission improves, and the pumping power also increases. The change in corrugation height and placement eccentricity significantly affects the heat transfer and pumping power.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Munawar Abbas, Nargis Khan, M. S. Hashmi, Jihad Younis
Summary: This study investigates the thermal energy characteristics of hybrid nanofluid flow over an infinite disc in a permeable medium with variable thermal conductivity and viscosity. The mathematical model considers the impacts of activation energy, heat source, thermophoretic particle deposition, and microorganisms. The findings show that the Marangoni convection parameter has a significant influence on various flow characteristics.
SCIENTIFIC REPORTS
(2023)
Article
Thermodynamics
Misagh Tafakhori, Davood Kalantari, Pourya Biparva, S. M. Peyghambarzadeh
Summary: Research shows that under a concentration of 0.1 vol%, the heat exchange performance of the car radiator is improved by approximately 21%, which is the optimal working condition, while increasing the nanoparticle concentration leads to heat transfer deterioration.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Amin Shahsavar, Seyed Saman Alimohammadi, Ighball Baniasad Askari, Hafiz Muhammad Ali
Summary: The numerical investigation of force convection flow of non-Newtonian water/CMC-CuO NF in three wavy channels and a straight channel was conducted. The study found that the influence of Re and nanoparticle concentration phi on pressure drop, Nu, and global entropy generation rates differed. Increasing Re and decreasing phi resulted in higher Nu values for all four channels, with the sinusoidal channel having the highest Nu. The trapezoidal channel had the highest pressure drop and total global entropy generation rate.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(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
Thermodynamics
Amir Hossein Shiravi, Mojtaba Shafiee, Mohammad Firoozzadeh, Hadis Bostani, Maryam Bozorgmehrian
Summary: The study investigates the main influencing factors of increasing the convective heat transfer coefficient, including flow rate and nanofluid concentration. Experiments conducted in the turbulent range showed that increasing the Reynolds number leads to an increase in CHTC and a decrease in the friction factor. Additionally, it was found that carbon nanofluid at a concentration of 0.21 mass% has significantly higher CHTC compared to pure water.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Review
Green & Sustainable Science & Technology
Mehmet Gurdal, Kamil Arslan, Engin Gedik, Alina Adriana Minea
Summary: Recent studies in thermal engineering found that there is little research on employing nanofluid as a working fluid in a specific channel while considering both turbulators and magnetic field effect. This review focuses on the single and combined effects of nanofluid type, volume fraction, channel and turbulator geometry, magnetic field type, and flow regime on the heat transfer enhancement of these systems.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Engineering, Mechanical
Si-Liang Sun, Dong Liu, Ying-Ze Wang, Yuan-Li Qi, Hyoung-Bum Kim
Summary: This study numerically investigates the flow behavior and heat transfer properties of iron oxide microparticle suspension in a coaxial cylindrical annular gap with a magnetic field. The results show that increasing the Reynolds number and Hartmann number enhances the heat transfer capability of the Taylor vortex flow, with a maximum improvement of 8.09%. The magnetic field causes anisotropic velocity and temperature distributions, and the Lorentz force promotes particle motion and facilitates energy exchange. This research provides a new means to enhance heat transfer in Taylor-Couette flow using magnetic fields.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Thermodynamics
Rabia Rehman, Hafiz Abdul Wahab, Umar Khan
Summary: A porous rotating disk was used to investigate the relationship between electrically conducting, incompressible gamma-alumina nanofluids and the second law of thermodynamics. The viscosity and thermal conductivity models of alumina nanofluids were obtained experimentally. Different velocity profiles were observed, and the influence of nanofluid type on fluid properties was studied.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
T. Hayat, Inayatullah, S. Momani, K. Muhammad
Summary: This analysis focuses on the unsteady Darcy-Forchheimer flow and heat transfer of nanomaterial on a stretching sheet, taking into account nonlinear mixed convection, Brownian motion, thermophoresis diffusion, magnetic field, and viscous dissipation. The dimensionless PDEs are solved using a finite difference scheme, and various parameters such as entropy generation, skin friction, mass transfer rate, and heat transfer rate are discussed. Velocity and temperature of the fluid are shown to be affected by buoyancy, Forchheimer number, time, Eckert number, and nonlinear convection parameter. High values of Schmidt number lead to concentration decay but intensify with thermophoretic diffusion and time. Entropy production rate is influenced by Prandtl and Eckert numbers, as well as temperature ratio and volume ratio parameters.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Engineering, Environmental
Marzena Iwaniszyn, Przemyslaw J. Jodlowski, Katarzyna Sindera, Anna Gancarczyk, Mateusz Korpys, Roman J. Jedrzejczyk, Andrzej Kolodziej
Summary: Experimental study showed that shortening the channels can greatly enhance transfer intensity, with results generally in good agreement with literature solutions but some unexplainable deviations observed.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Mechanics
Mahanthesh Basavarajappa, Dambaru Bhatta
Summary: The cone-disk apparatus is used to study the three-dimensional flow of nanofluids and investigate the flow, mass, and heat transport features under different physical configurations.
Article
Thermodynamics
Guoqiang Xu, Youzhi Huang, Yongkai Quan, Qiuyang Yin, Jieming Chai, Jianyu Liu
Summary: This study investigates the effect of thin-film heat flux sensors on local flow and heat transfer. The results show that heat transfer can be significantly enhanced by the presence of the sensor, particularly when its height is within 2% of the flow boundary layer.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Engineering, Mechanical
Priyajit Mondal, T. R. Mahapatra
Summary: This study investigates the double diffusive, MHD, mixed convection flow of Al2O3-water nanofluid in a trapezoidal enclosure, considering various inclination angles and aspect ratios. The research focuses on entropy generation related to heat transfer and mass transfer, finding that lower Richardson numbers lead to reduced entropy generation.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Mechanics
U. K. Sarkar, Nirmalendu Biswas, Hakan F. Oztop
Summary: The study investigates the steady natural convection in a bottom-heated semi-elliptical enclosure using the finite volume method for different geometric and flow configurations. It is found that for aspect ratios A =1, 0.75, and 0.5, multiple steady solutions with counter-rotating convection cells appear when the Rayleigh number exceeds a critical value; however, such multiplicity is not observed for A = 0.25.
Article
Chemistry, Multidisciplinary
Abbas Mokhtari-Farsani, Masoud Hasany, Iseult Lynch, Mehdi Mehrali
Summary: This paper summarizes recent progress and important research in the biodegradation of carbon-based nanomaterials (CBNs), explores the potential impact of biomolecular corona (BMC) on CBN biodegradation, and points out the issue of overlooking BMC effects in current studies in the field.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Thermodynamics
Chung-Yu Yeh, K. J. F. Boonk, Gholamabbas Sadeghi, Mohammad Mehrali, Mina Shahi, Gerrit Brem, Amirhoushang Mahmoudi
Summary: This study explores a compact design of storage-integrated solar thermal collector and investigates the use of a shape stabilized phase change material (PCM) to improve the energy efficiency of a typical solar domestic water heating system. Experimental testing and numerical modeling were conducted to analyze the thermal properties of the developed PCM. The results show that optimizing the collector design can significantly extend the discharging period and improve the charging rate.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Sahand Rahemipoor, Mohammad Kohestanian, Ali Pourjavadi, Hossein Heidarzadeh Vazifehkhorani, Mehdi Mehrali
Summary: Multistimuli-responsive hyperbranched polymers were successfully synthesized in one step using RAFT-SCVP, showing controlled properties for potential sensor applications.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Energy & Fuels
Gholamabbas Sadeghi, Mohammad Mehrali, Mina Shahi, Gerrit Brem, Amirhoushang Mahmoudi
Summary: Investigations into the design of compact PCM-solar systems have shown that integrated flat plate storage systems are predominantly used for space heating, while concentrating solar collectors are primarily utilized in industrial applications, employing different phase change materials to provide varying temperature levels.
Review
Chemistry, Multidisciplinary
Aziz Maleki, Matineh Ghomi, Nasser Nikfarjam, Mahsa Akbari, Esmaeel Sharifi, Mohammad-Ali Shahbazi, Mehraneh Kermanian, Mohammed Seyedhamzeh, Ehsan Nazarzadeh Zare, Mehdi Mehrali, Omid Moradi, Farshid Sefat, Virgilio Mattoli, Pooyan Makvandi, Yu Chen
Summary: MXenes, as a new subclass of 2D materials, have shown great potential in biomedical applications, especially in drug delivery, tissue engineering, and biosensors. The integration of MXenes into hydrogels can enhance the electrical conductivity and mechanical properties of scaffolds, making it significant for biomedical engineering.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Amir Reza Akhiani, Hendrik Simon Cornelis Metselaar, Bee Chin Ang, Mehdi Mehrali, Mohammad Mehrali
Summary: This study introduces a new approach for facile assembly of graphene nanoplatelet (GNP) to overcome the practical application issues of phase change materials (PCMs) in solar-thermal technology. The embedded GNP enhances the loading of paraffin wax and transition enthalpy, resulting in excellent solar-thermal storage efficiency.
MATERIALS TODAY ENERGY
(2022)
Article
Construction & Building Technology
Ahmed Mahmoud Alnahhal, U. Johnson Alengaram, Muhammad Shazril Idris Ibrahim, Sumiani Yusoff, Hendrik Simon Cornelis Metselaar, Petrina Gabriela Johnson
Summary: This study investigated the influence of sand to binder ratio and various by-product materials on the structural grade geopolymer foamed concrete. The use of fine sand was found to improve the mechanical and micro-structural characteristics of the geopolymer foamed concrete. The results showed that the geopolymer foamed concrete had compressive strengths ranging from 27 to 39 MPa. Non-uniform distribution of voids and the formation of calcium aluminosilicate hydrates were also observed.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Thermodynamics
Gholamabbas Sadeghi, Mohammad Mehrali, Mina Shahi, Gerrit Brem, Amirhoushang Mahmoudi
Summary: This study addresses the issue of storage tank requirement in solar water heaters by experimentally applying a shape-stabilized phase change material (PCM) to a tankless solar collector. The research found that the thermal efficiency of the collector-storage system was significantly improved, showing potential for energy storage. Changing the flow rate had a limited impact on heat gain, but high flow rates reduced the discharge efficiency. Furthermore, the proposed system showed promising results in terms of cost savings and reduction in CO2 emissions.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Mechanics
Mohammed Abdul Qadeer Siddiqui, Emad Sadeghinezhad, Klaus Regenauer-Lieb, Hamid Roshan
Summary: Wettability is the key factor controlling fluid flow in an electrically neutral partially saturated micro-channel. This study investigates the movement of KCl electrolytes with different concentrations in an electrically charged micro-channel, and reveals the importance of both electro-osmosis and electrocapillary flow in partially saturated electrically charged micro-channels.
Article
Construction & Building Technology
Navid Ranjbar, Carsten Kuenzel, Carsten Gundlach, Paul Kempen, Mehdi Mehrali
Summary: This study investigates the role of halloysite nanotube as a mineral-based thixotropic admixture to 3D printable geopolymer mortar. The first part of the study focuses on the thermal evolution of halloysite at different temperatures. The second part examines how calcination and concentration of halloysite affect the properties of 3D-printable geopolymer mortar. It was found that the addition of 1-2 wt% halloysite significantly improves the rheological properties and buildability of the mortars without compromising their mechanical strength.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Green & Sustainable Science & Technology
Sahand Rahemipoor, Masoud Hasany, Mohammad Mehrali, Kristoffer Almdal, Navid Ranjbar, Mehdi Mehrali
Summary: The advent of 3D printing revolutionizes conventional construction by providing a cost-effective and fast method for constructing complex structures. This study presents an environmentally friendly approach by integrating Macroencapsulated Phase Change Materials (MEPCM) into a 3D printable geopolymer paste (GPP) derived from fly ashes, promoting sustainable buildings and reducing energy consumption.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Thermodynamics
Faezeh Rostamian, Nasrin Etesami, Mehdi Mehrali
Summary: In this study, microencapsulation of phase change materials (PCMs) was conducted for temperature management of satellite electronic boards. The synthesized microcapsules showed stability and a significant delay in reaching critical temperature, indicating the effectiveness of microencapsulated PCMs (MPCMs) in temperature management. The results demonstrate that MPCMs are a promising approach for managing the temperature of satellite electronic boards.
APPLIED THERMAL ENGINEERING
(2024)
Article
Materials Science, Multidisciplinary
Sahand Rahemipoor, Mohammad Kohestanian, Ali Pourjavadi, Hossein Heidarzadeh Vazifehkhorani, Mehdi Mehrali
Summary: In this study, multistimuli-responsive hyperbranched polymers were successfully synthesized in one step using the RAFT-SCVP method, allowing for control of molecular weights and degree of branching. These smart hyperbranched polymers exhibit responses to various stimuli such as UV-vis or sunlight, pH changes, and temperature changes.
ACS APPLIED POLYMER MATERIALS
(2022)