Article
Engineering, Multidisciplinary
Haiying Zhang, Xiujun Nie, Dmitry Olegovich Bokov, Davood Toghraie, Omid Ali Akbari, Farnaz Montazerifar, Farzad Pourfattah, Yousof Esmaeili, Roohollah Khodaparast
Summary: In this study, laminar mixed convection of water/Ag nanofluid with different volume fractions of nanoparticles was simulated. The results show that adding a higher volume fraction of nanoparticles at lower Richardson numbers enhances heat transfer and Nusselt number. The streamlines in the cavity are influenced by lid-driven motion and fluid viscosity, which contribute to achieving uniform temperature distribution in the cavity.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Apichit Maneengam, Tarek Bouzennada, Aissa Abderrahmane, Kamel Guedri, Wajaree Weera, Obai Younis, Belgacem Bouallegue
Summary: This study investigates the influence of the lid-driven top wall and the waviness of the side walls on the mixed convection heat transfer, flow behavior, and entropy generation of a hybrid nanofluid. The results show that the magnetic force plays a significant role in the thermal and flow behavior of the working fluid, and the undulation number of the wavy side walls has a strong impact on the heat transfer rate and irreversibility.
Article
Thermodynamics
Eren Colak, Ozgur Ekici, Hakan F. Oztop
Summary: This study investigates the lid-driven cavity problem under mixed convection conditions using Finite Volume Method (FVM). It is found that the Darcy number can control vortex formation and decrease in Darcy number can drastically increase the average Nusselt number. Heater orientation can be used to control heat transfer effectiveness, vortex shape and size, and can increase the average Nusselt number by 324%. Both heater location and orientation exhibit non-monotonic behavior for different flow parameters.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Multidisciplinary
M. M. Rashidi, M. Sadri, M. A. Sheremet
Summary: This study simulated the energy transference of a hybrid nanosuspension under the influence of a magnetic field, showing that the solid volume fraction of nanoparticles in the hybrid nanofluid has a significant impact on heat transfer efficiency. Proper selection of flow parameters like Richardson number and Hartmann number can enhance the heat transmission rate.
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
Thermodynamics
Mohammed Azeez Alomari, Khaled Al-Farhany, Nejla Mahjoub Said, Mujtaba A. Flayyih
Summary: This paper numerically studied the double-diffusive mixed convection of MWCNT/water in a curvilinear cavity with split lid-driven and hot ellipses. The heat and mass transfers were found to be greatly enhanced with the increase of Reynolds number in the case of low Richardson number. However, the effect of Reynolds number becomes unnoticeable with a high Richardson number. Furthermore, Lewis number has a positive effect on heat and mass transfer, and this effect increases with increasing Richardson number.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
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
Mathematics, Applied
An-Yang Wang, Hang Xu
Summary: The classic problem of mixed convection flow within an inclined square lid-driven cavity is extended to the case of hybrid nanofluid. The proposed Coiflet wavelet-homotopy method is used to study the governed partial differential equations with non-homogeneous boundary conditions. Highly accurate solutions with clear vortex structures are obtained. The results show that the proposed approach is more effective and accurate in dealing with complicated nonlinear problems compared to the traditional methods. Additionally, the study examines the physical properties of hybrid nanofluid behaviors and finds that they offer better heat transfer enhancement than traditional heat transfer fluids, but are also easier and cheaper.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2022)
Article
Mechanics
Aneela Bibi, Hang Xu
Summary: This article investigates fluid dynamics and heat transfer properties in a trapezoidal enclosure containing a heated cylindrical object. It explores the interaction of multiple physical processes and analyzes the governing equations numerically. The findings demonstrate the various factors influencing the thermal and mass transfer in the enclosure, and the effectiveness of the multiple expression programming (MEP) technique in predicting heat transfer behavior.
Article
Multidisciplinary Sciences
Ammar I. Alsabery, Tahar Tayebi, Hakim T. Kadhim, Mohammad Ghalambaz, Ishak Hashim, Ali J. Chamkha
Summary: The study investigates the influence of a two-phase hybrid nanofluid approach on mixed convection characteristics, considering factors such as nanoparticle migration and the presence of solid obstacles. The analysis of non-dimensional parameters using the finite element technique reveals that temperature gradient can lead to significant concentration variations within the enclosure.
JOURNAL OF ADVANCED RESEARCH
(2021)
Article
Physics, Applied
M. Rajarathinam, M. Ijaz Khan, N. Nithyadevi, Mohammed Jameel, Kamel Guedri, Ahmed M. Galal
Summary: In this study, heat transfer enhancement using nanofluid in a porous cavity with a solid block is investigated numerically. The results show that the direction of moving walls plays a crucial role on the heat transfer, with the opposite direction yielding the highest rate. Additionally, the length of the solid block also has a significant influence on the heat transfer.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2022)
Article
Multidisciplinary Sciences
Sattar Aljabair, Ali L. Ekaid, Sahira Hasan Ibrahim, Israa Alesbe
Summary: In this study, mixed convection heat transfer of Cu-water nanofluid in an arc cavity with non-uniform heating was numerically investigated. The results showed that the local and average heat transfer rates increase with increased volume fraction, Reynolds number, or Rayleigh number. Correlation equations of the average Nusselt number from numerical results were also presented.
Article
Physics, Multidisciplinary
Bader Alshuraiaan, Ioan Pop
Summary: The numerical analysis of mixed convection in a lid-driven trapezoidal cavity with a flexible bottom wall filled with a hybrid nanofluid shows that both Reynolds number and volume fraction of nanoparticles significantly affect flow and heat transfer characteristics. The Fluid-Structure-Interface (FSI) model has a profound effect on heat transfer compared to a rigid wall model, and FSI is more feasible to enhance heat transfer compared to the addition of nanoparticles. This study confirms the promising applications of FSI model in enhancing heat transfer characteristics.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Thermodynamics
Nouari Soufiane, Ait Hssain Mustapha, Lafdaili Zakaria, El-hamdani Sakina, Doghmi Hicham
Summary: This study investigates the effect of lid movement on heat transfer and cooling of blocks in a cubic enclosure filled with a Cu-water nanofluid. The results show that decreasing the Richardson number enhances the heat transfer coefficient. Longitudinal movement provides better block cooling compared to transverse movement. Changing the block height from L/4 to 3L/4 reduces heat transfer inside the cavity and over the blocks.
ASME JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Mathematics
Obai Younis, Sameh E. Ahmed, Aissa Abderrahmane, Abdulaziz Alenazi, Ahmed M. Hassan
Summary: This article presents a numerical investigation of the magnetohydrodynamics of a mixed convection of nanoenhanced phase change material (NEPCM) within a triangular chamber containing an elliptical heat source. Forced convection is induced by the movement of the upper cavity, while free convection is due to the temperature difference between the heat source and inclined sidewalls. The impacts of various parameters on the heat transfer rate are discussed, including the Reynolds number, inclination angle of the heat source, nanoparticles volume fraction, and the movement directions of the upper wall.
Article
Mathematics, Applied
Darya S. Loenko, Aroon Shenoy, Mikhail A. Sheremet
Summary: This research focuses on the numerical analysis of natural convection in a cavity filled with a non-Newtonian nanosuspension under the influence of a heat-generating wall section. The study shows that adding nanosized particles to heat transfer liquids can enhance heat removal from heated elements in electronic devices, and different boundary conditions result in different temperature patterns.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2023)
Article
Thermodynamics
Syed Saqib Shah, Hakan F. Oztop, Rizwan Ul-Haq, Nidal Abu-Hamdeh
Summary: This paper analyzes the buoyancy flow, mass and heat transfer in a coaxial duct under the Soret and Dufour effect. The combined effects of various parameters on natural convection are studied using a numerical approach. The results show that the Lewis number has a significant impact on mass transfer, while the buoyancy ratio parameter decreases the average rate of heat flow and increases mass transfer.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2023)
Article
Thermodynamics
Ahmad H. Milyani, Mohammed N. Ajour, Hesham A. Alhumade, Nidal H. Abu-Hamdeh
Summary: This article numerically simulates the heat transfer between air and a battery pack in a duct using Comsol software. The results show that the battery temperature in the duct changes over time and eventually stabilizes. Calculations indicate that 13.83% of the required thermal energy can be supplied by the batteries.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Engineering, Multidisciplinary
Ammar A. Melaibari, Ahmad S. Alamoudi, Mohamed E. Mostafa, Nidal H. Abu-Hamdeh
Summary: The treatment of industrial wastewaters, especially petroleum wastewaters, is of high environmental importance. Recycling wastewater is doubly important in water scarce countries. Refineries, being heavy water consumers, can cause surface and underground water contamination if environmental preservation is not prioritized. Therefore, it is necessary to use appropriate methods to remove toxic substances like phenol from wastewater.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Thermodynamics
Z. Li, Jiaxuan Leng, Nidal H. Abu-Hamdeh, Khaled O. Daqrouq, Awad Musa, Osama K. Nusier
Summary: The effects of lateral injection from the circular strut on the fuel mixing and distributions in a scramjet engine for high-speed flight are comprehensively investigated using computational fluid dynamics (CFD). The results show that the circulation factor is reduced and the mixing performance is improved when the single cross jet is replaced by the lateral injection system or when the strut height of lateral injection is increased. Furthermore, replacing the single normal injection with a lateral nozzle located on a circular strut significantly improves the mixing performance behind the injector.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
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
Multidisciplinary Sciences
Hakan F. Oztop, Omer Akbal, Fatih Selimefendigil, Nidal H. Abu-Hamdeh
Summary: Three-dimensional computational analysis investigates the melting time of PCM in a sinusoidal pipe inserted into another pipe. The study aims to control melting time through passive techniques by adjusting the geometrical parameter without extra energy consumption.
Review
Chemistry, Multidisciplinary
Muhammad Mohsin, Tehmeena Ishaq, Ijaz Ahmad Bhatti, Maryam, Asim Jilani, Ammar A. Melaibari, Nidal H. Abu-Hamdeh
Summary: This article discusses the application of nanomaterials in photocatalytic hydrogen production. Nanomaterials are attractive due to their high specific surface area, morphology, and light absorption. Hydrogen, as a clean and green energy source, can help mitigate the existing energy crisis and environmental pollution caused by fossil fuels. The article summarizes various techniques to enhance hydrogen production, including the thermochemical process, electrocatalytic process, and direct solar water splitting. It also reviews modification strategies such as band gap engineering, semiconductor alloys, and multiphoton photocatalysts. This review can serve as a reference for researchers and encourage the development of new materials for hydrogen generation.
Article
Energy & Fuels
Fatih Selimefendigil, Furkan Dilbaz, Hakan F. Oztop
Summary: The thermal management of lithium-ion batteries is crucial for improving their performance and lifespan. This study proposes a novel cooling system using an inner cylinder and different-shaped nanoparticles as the cooling medium. Numerical analysis shows that both cooling media reduce the highest temperature and homogenize the temperatures in the battery as the Reynolds number increases. The utilization of a nanofluid containing cylindrical-shaped nanoparticles and a cylinder in the mini-channel proves to be an effective cooling system for battery thermal management.
Article
Thermodynamics
Fatih Selimefendigil, Hakan F. oeztop
Summary: The design of a cooling system for a curved conductive panel is developed using nano-enhanced multiple jet impingement. The study shows that the type of panel and operating parameters affect cooling performance and entropy generation. Adjustments in operating parameters can improve cooling effectiveness and reduce entropy generation.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Thermodynamics
Hakan F. Oztop, Fatih Selimefendigil, Hakan Cosanay, Nidal Abu-Hamdeh
Summary: In this study, the phase change process and convection inside an open cavity equipped with two different phase change materials (PCMs) were analyzed using the finite volume method with ANSYS Fluent. The analysis was conducted for different Grashof number values and it was found that the PC becomes faster when the object is closer to the exit in the fully open case. The partly open case results in higher thermal performance improvements, with a 94.5% increase in the average Nusselt number for PCM-18.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Energy & Fuels
Hakan F. F. Oztop, Elanur Baki Sezgin
Summary: The use of containers with streamlined corners reduces the melting time of phase change materials (PCMs) under the same boundary conditions, serving as a passive control method to improve energy efficiency.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2023)
Article
Thermodynamics
Burak Kiyak, Hakan F. Oztop, I. Gokhan Aksoy
Summary: This study investigated the melting performance of phase change materials in a disk-shaped container with partial circular heating. The results showed that in partial heating cases, increasing the aspect ratio extended the melting time and decreased the liquid fraction.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Thermodynamics
Sudhanshu Kumar, Krunal M. Gangawane, Hakan F. Oztop, Sibasish Panda
Summary: This research work presents a numerical investigation of magnetohydrodynamics (MHD) characteristics near-wall blockage due to double-diffusive convection (DDC) in a rectangular cavity. The results show that as the separation distance increases, heat and mass transfer rates enhance, while the increase in Hartmann number (Ha) results in a monotonic decrease in heat and mass transfer rates.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Thermodynamics
Mahsa Taghavi, Swapnil Sharma, Vemuri Balakotaiah
Summary: This study investigates the natural convection effects in the insulation layers of spherical storage tanks and their impact on the tanks' performance. The permeability and Rayleigh number of the insulation material are considered as key factors. The results show that as the Rayleigh number increases, new convective cells emerge and cause the cold boundary to approach the external hot boundary. In the case of large temperature differences, multiple solutions may coexist.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyang Xu, Fangjun Hong, Chaoyang Zhang
Summary: This study introduces a self-induced jet impingement device for enhancing pool boiling performance in high power electronic cooling. Through visualization and parametric investigations, the effects of this device on pool boiling performance are studied, revealing the promotion of additional liquid supply and vapor exhausting. The flow rate of the liquid jet is found to positively impact boiling performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Wenchao Ke, Yuan Liu, Fissha Biruke Teshome, Zhi Zeng
Summary: Underwater wet laser welding (UWLW) is a promising and labor-saving repair technique. A thermal multi-phase flow model was developed to study the heat transfer, fluid dynamics, and phase transitions during UWLW. The results show that UWLW creates a water keyhole, making the welding environment similar to in air laser welding.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Xingrong Lian, Lin Tian, Zengyao Li, Xinpeng Zhao
Summary: This study investigates the heat transfer mechanisms in natural fiber-derived porous structures and finds that thermal radiation has a significant impact on the thermal conductivity in low-density regions, while natural convection rarely occurs. Insulation materials derived from micron-sized natural fibers can achieve minimum thermal conductivity at specific densities. Strategies to lower the thermal conductivity include increasing porosity and incorporating nanoscale pores using nanosize fibers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Yasir A. Malik, Kilian Koebschall, Stephan Bansmer, Cameron Tropea, Jeanette Hussong, Philippe Villedieu
Summary: Ice crystal icing is a significant hazard in aviation, and accurate modeling of sticking efficiency is essential. In this study, icing wind tunnel experiments were conducted to quantify the volumetric liquid water fraction, sticking efficiency, and maximum thickness of ice layers. Two measurement techniques, calorimetry and capacitive measurements, were used to measure the liquid water content and distribution in the ice layers. The experiments showed that increasing wet bulb temperatures and substrate heat flux significantly increased sticking efficiency and maximum ice layer thickness.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinqi Hu, Tongtong Geng, Kun Wang, Yuanhong Fan, Chunhua Min, Hsien Chin Su
Summary: This study experimentally examined the heat dissipation of vibrating fans and demonstrated its inherent mechanism through numerical simulation. The results showed that the flow fields induced by the vibrating blades exhibited pulsating features and formed large-scale and small-scale vortical structures, significantly improving heat dissipation. The study also identified the impacts of different blade structures and developed a trapezoidal-folding blade, which effectively reduced the maximum temperature of the heat source and alleviated high-temperature failure crisis.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Dan-Dan Su, Xiao-Bin Li, Hong-Na Zhang, Feng-Chen Li
Summary: The boiling heat transfer of low-boiling-point working fluid is a common heat dissipation technology in electronic equipment cooling. This study analyzed the interfacial boiling behavior of R134a under different conditions and found that factors such as the initial thickness of the liquid film, solid-liquid interaction force, and initial temperature significantly affect the boiling mode and thermal resistance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyi Wu, Dongke Sun, Wei Chen, Zhenhua Chai
Summary: A unified lattice Boltzmann-phase field scheme is proposed to simulate dendrite growth of binary alloys in the presence of melt convection. The effects of various factors on the growth are investigated numerically, and the model is validated through comparisons and examinations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shaokun Ge, Ya Ni, Fubao Zhou, Wangzhaonan Shen, Jia Li, Fengqi Guo, Bobo Shi
Summary: This study investigated the temperature distribution of main cables in a suspension bridge during fire scenarios and proposed a prediction model for the maximum temperature of cables in different lane fires. The results showed that vehicle fires in the emergency lane posed a greater thermal threat to the cables.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shuang-Ying Wu, Shi-Yao Zhou, Lan Xiao, Jia Luo
Summary: This paper investigates the two-phase flow and heat transfer characteristics of low-velocity jet impacting on a cylindrical surface. The study reveals that the heat transfer regimes are non-phase transition and nucleate boiling with the increase of heat transfer rate. The effects of jet impact height and outlet velocity on local surface temperatures are pronounced at the non-phase transition stage. The growth rates of heat transfer rate and liquid loss rate increase significantly from the non-phase transition to nucleate boiling stage.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Emad Hasani Malekshah, Wlodzimierz Wlodzimierz, Miros law Majkut
Summary: Cavitation has significant practical importance and can be controlled by air injection. This study investigates the natural to ventilated cavitation process around a hydrofoil through numerical and experimental methods. The results show that the location and rate of air injection have a meaningful impact on the characteristics of cavitation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Feriel Yahiat, Pascale Bouvier, Antoine Beauvillier, Serge Russeil, Christophe Andre, Daniel Bougeard
Summary: This study explores the enhancement of mixing performance in laminar flow equipment by investigating the generation of chaotic advection using wall deformations in annular geometries. The findings demonstrate that the combined geometry can achieve perfect mixing at various Reynolds numbers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Hui He, Ning Lyu, Caihua Liang, Feng Wang, Xiaosong Zhang
Summary: This study investigates the condensation, frosting, and defrosting processes on superhydrophobic surfaces with millimeter-scale structures. The results reveal that the structures can influence the growth and removal of frost crystals, with the bottom grooves creating a frost-free zone and conical edges promoting higher frost crystal heights. Two effective methods for defrosting are observed: hand-lifting the groove and airfoil retraction contraction on protruding structures. This research provides valuable insights into frost formation and defrosting on millimeter-structured superhydrophobic surfaces, with potential applications in anti-frost engineering.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Thiwanka Arepolage, Christophe Verdy, Thibaut Sylvestre, Aymeric Leray, Sebastien Euphrasie
Summary: This study developed two thermal concentrators, one with a 2D design of uniform thickness and another with a 3D design, using the coordinate transformation technique and metamaterials. By structuring the thermal conductor, the desired local density-heat capacity product and anisotropic thermal conductivities were achieved. The homogenized thermal conductivities were obtained from finite element simulations and cylindrical symmetry consideration. A 3D concentrator was fabricated using 3D metal printing and characterized using a thermal camera. Compared to devices that solely consider anisotropic conductivities, the time evolution characteristics of the metadevice designed with coordinate transformation were closer to those of an ideal concentrator.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Liangyuan Cheng, Qingyang Wang, Jinliang Xu
Summary: In this study, we investigated the supercritical heat transfer of CO2 in a horizontal tube with a diameter of 10.0 mm, covering a wide range of pressures, mass fluxes, and heat fluxes. The study revealed a non-monotonic increase in wall temperatures along the flow direction and observed both positive and negative wall temperature differences between the bottom and top tube. The findings were explained by the thermal conduction in the solid wall interacting with the stratified-wavy flow in the tube.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)