Article
Mathematics, Interdisciplinary Applications
Mohammed Z. Swalmeh, Feras Shatat, Firas A. Alwawi, Mohd Asrul Hery Ibrahim, Ibrahim Mohammed Sulaiman, Nusayba Yaseen, Mohammad F. M. Naser
Summary: The micropolar liquid model can explain and predict the behavior of real fluids through studying the local structure and micromotions of liquid particles. In this study, the radiative heat transmission of micropolar fluid over a solid sphere is investigated, and it is found that the intensity of the magnetic field and the volume fraction of nanoparticles have effects on velocity and energy transport.
FRACTAL AND FRACTIONAL
(2022)
Article
Multidisciplinary Sciences
Fuzhang Wang, Shafiq Ahmad, Qasem Al Mdallal, Maha Alammari, Muhammad Naveed Khan, Aysha Rehman
Summary: This article mainly focuses on the influence of chemical reaction slip condition on the unsteady three-dimensional Maxwell bio-convective nanomaterial liquid flow towards an exponentially expanding surface. The study examines the changes in temperature, velocity, microorganism, and concentration field through numerical calculations and graphical evaluation. The results show that the involvement of unsteadiness parameter restricts the transition from laminar to turbulent flow, while the velocity slip parameter has a decreasing effect on velocity components.
SCIENTIFIC REPORTS
(2022)
Article
Thermodynamics
A. Sukhanovskii, A. Vasiliev
Summary: This study conducts numerical simulations of Rayleigh-Benard convection in a cubic cavity to examine the structure of the thermal boundary layer under mixed boundary conditions. The study aims to investigate the physical mechanism that leads to an increase in heat flux with spatial frequency of the conducting-adiabatic pattern. The results show that the temperature boundary layer at the bottom is highly non-uniform due to factors such as the conducting-adiabatic pattern, large-scale circulation, and small-scale motions over the conducting plates. The thickness of the thermal boundary layer strongly depends on the size of the conducting plates and can be significantly smaller than in classical Rayleigh-Benard convection, resulting in an increased heat flux.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Review
Thermodynamics
Zoljargal Narankhishig, Jeonggyun Ham, Hoseong Lee, Honghyun Cho
Summary: The review covers experimental and numerical investigations on the convective heat transfer of various nanofluids, especially hybrid nanofluids. Performance optimization of nanofluid heat and mass transfer is influenced by factors such as nanofluid characteristics, synthesis method, magnetic force, nanoparticle concentration and size, and Reynolds number. Studies have shown that the magnetic field in magnetic nanoparticles can significantly enhance the convective heat transfer performance of nanofluids.
APPLIED THERMAL ENGINEERING
(2021)
Article
Chemistry, Inorganic & Nuclear
Arthur Zakinyan, Stanislav Kunikin, Andrey Chernyshov, Vitali Aitov
Summary: This study focuses on the development and suppression of thermal convection in a flat vertical quasi-two-dimensional layer of magnetic nanofluid, demonstrating the effectiveness of applying external magnetic fields to regulate convective heat transfer. It shows that an external uniform stationary magnetic field perpendicular to the temperature gradient can suppress convection, leading to a slowdown in the heating and cooling processes of metal plates in a magnetic nanofluid. The results obtained provide insights into similar exchange processes in liquids under the influence of a magnetic field.
Article
Thermodynamics
K. Loganathan, K. Mohana, M. Mohanraj, P. Sakthivel, S. Rajan
Summary: The study utilized the CCHF model for heat transfer and entropy generation analysis, with consideration of different flow constants impact on fluid friction, heat, and mass transfer. Nonlinear PDE were simplified into a set of nonlinear ODE systems using similarity transformations, and the influence of flow constants on velocity, entropy generation, and temperature profiles were discussed.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Mathematics, Applied
Dipunja Gohain, Bijoy Krishna Taid, Nazibuddin Ahmed
Summary: In this study, the MHD water-based nanofluid flow past an impulsively started infinite vertical plate embedded in a porous medium is investigated, considering ramped velocity and concentration, as well as the presence of Hall effect, thermal radiation, chemical reaction, heat source/sink, and thermal diffusion. The governing equations are solved using the Laplace transform method, and the effects of various embedded parameters on velocity, temperature, and concentration profiles are analyzed through graphical interpretation. The variations of the Nusselt number, Sherwood number, and skin friction are also studied. It is found that higher nanoparticle volume fractions lead to reduced primary and secondary velocities and concentration, while increasing the temperature. Thermal diffusion increases the fluid concentration, and the rate of momentum transfer decreases with an increase in the Hall current parameter.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2023)
Article
Meteorology & Atmospheric Sciences
Velibor Zeli, Geert Brethouwer, Stefan Wallin, Arne V. Johansson
Summary: This study demonstrates that the explicit algebraic Reynolds-stress (EARS) model, when implemented in a single-column context, is able to accurately capture the main features of both stable and dry convective atmospheric boundary layers (ABL). By comparing results with large-eddy simulations, it is shown that the EARS model performs well and provides valuable insights into the counter-gradient heat flux in the upper part of the ABL. The study concludes that the EARS model, with the same formulation and calibration, can be applied to a wide range of stable and moderately unstable stratifications.
BOUNDARY-LAYER METEOROLOGY
(2021)
Article
Thermodynamics
Somayeh Davoodabadi Farahani, Mohammad Amiri, Behnam Kazemi Majd, Amir Mosavi
Summary: This research aims to evaluate the impact of porous media, nanofluid, and magnetic field on heat transfer in a circular channel, considering different porous arrangements and parameter variations. The results show that the heat transfer rate is higher in the central arrangement compared to the boundary arrangement, increasing nanofluid and magnetic field intensity can enhance heat transfer rate, and modifying the shape of the porous media affects heat transfer rate.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Bo Zhao, Kaiyong Li, Yipeng Wang, Ziyu Wang
Summary: The study focuses on convective heat transfer mechanism on porous structures in turbulent flows, establishing energy balance relationships and analyzing the effects of injection and suction on turbulent convective heat transfer. It proposes a new calculation formula for convective heat transfer and reveals the turbulence characteristics of convective heat transfer with uniform injection and suction.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Thermodynamics
Areum Lee, Yongseok Jeon, Veerakumar Chinnasamy, Honghyun Cho
Summary: The experimental results show that the convective heat transfer properties of cobalt-zinc ferrite nanofluids are significantly affected by magnetic field, with the CHT coefficient increasing with the concentration of nanofluids and the presence of a magnetic field.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Multidisciplinary Sciences
Arshad Khan, Anwar Saeed, Asifa Tassaddiq, Taza Gul, Poom Kumam, Ishtiaq Ali, Wiyada Kumam
Summary: This study investigates the thermal behavior of bio-convective hybrid nanofluid flowing on a moving needle, considering the effects of chemical reactions, viscous dissipation, and microorganisms. The results show that as the bioconvection Rayleigh number, buoyancy ratio, and volume fraction of nanoparticles increase, fluid flow decreases while thermal flow increases. The comparison with existing literature shows agreement on variations in needle thickness.
SCIENTIFIC REPORTS
(2021)
Article
Thermodynamics
Zia Ullah, Mohammed Alkinidri
Summary: This study investigates the magnetic flux and heat transmission in an electrically-conducting fluid over a stretchable cylinder with convective boundary conditions. The research reveals a prominent slip effect in temperatures and suggests that surface heat flux has an impact on the intensity of the magnetic field.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Sadique Rehman, Wasim Jamshed, Mohamed R. Eid, Kashif Irshad, Amjad Ali Pasha, Salem Algarni, Sayed M. El Din, Talal Alqahtani
Summary: Mineral oil plays a crucial role in various manufacturing, technological, and industrial processes. This study focuses on the exact solution of unsteady convective flow of a Maxwell nanofluid with radiation and uniform heat flux. Nanoparticles of Al2O3 are suspended in mineral oil to form a homogeneous nanofluid solution. The governing equations are transformed into dimensionless form, and the Laplace transform method is used to obtain the solutions for energy and momentum profiles. The effects of different dimensionless variables and parameters on the solutions are analyzed, and a comparison between Newtonian and Maxwell fluids is presented.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Bo Zhao, Wei Long, Rong Zhou
Summary: This study formulates two-dimensional convective heat fluxes for turbulent thermal boundary layer flow over a flat plate. The analysis reveals the interdependent relationship between different heat flux components and the division of turbulent thermal boundary layer into laminar sublayer and turbulent layer. The proposed analytical expressions for convective turbulent heat transfer coefficients are validated for air and water, providing insights into the turbulent structure on flat plates.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Thermodynamics
Hai Zhao, Puzhen Gao, Xiaochang Li, Ruifeng Tian, Hongyang Wei, Sichao Tan
Summary: This study numerically investigates the interaction between flow-induced vibration and forced convection heat transfer in a tube bundle. The results show that the impact of flow-induced vibration on heat transfer varies in different flow velocity regions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rohit Chintala, Jon Winkler, Sugirdhalakshmi Ramaraj, Xin Jin
Summary: The current state of fault detection and diagnosis for residential air-conditioning systems is expensive and not suitable for widespread implementation. This paper proposes a cost-effective solution by introducing an automated fault detection algorithm as a screening step before more expensive tests can be conducted. The algorithm uses home thermostats and local weather information to identify thermodynamic parameters and detect high-impact air-conditioning faults.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
A. Azimi, N. Basiri, M. Eslami
Summary: This paper presents a novel optimization algorithm for improving the water-film cooling system of photovoltaic panels, resulting in a significant increase in net energy generation.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Duc-Thuan Phung, Chin-Hsiang Cheng
Summary: In this study, a novel CFDMD model is used to analyze and investigate the behavior of thermal-lag engines (TLE). The study shows that the CFDMD model effectively captures the thermodynamic behavior of the working gas and the dynamic behavior of the engine mechanism. Additionally, the study explores the temporal evolution of engine speed and the influence of various parameters on shaft power and brake thermal efficiency. The research also reveals the existence of a thermal-lag phenomenon in TLE.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Haiying Yang, Yinjie Shen, Lin Li, Yichen Pan, Ping Yang
Summary: The purpose of this article is to find a measure to improve the interfacial thermal transfer of graphene/silicon heterojunction. Through molecular dynamics simulation, it is found that surface modification can significantly reduce the thermal resistance, thereby improving the thermal conductivity of the graphene/silicon interface.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Qiong Wu, Yancheng Wang, Haonan Zhou, Xingye Qiu, Deqing Mei
Summary: This article introduces a visible methanol steam reforming microreactor, which uses an optical crystal as an observation window and measures the reaction temperature in real-time using infrared thermography. The results show that under lower oxygen to carbon ratio conditions, the microreactor has a higher heating rate and a stable gradient in temperature distribution.
APPLIED THERMAL ENGINEERING
(2024)
Review
Thermodynamics
Giulia Manco, Umberto Tesio, Elisa Guelpa, Vittorio Verda
Summary: In the past decade, there has been a growing interest in studying energy systems for the combined management of power vectors. Most of the published works focus on finding the optimal design and operations of Multi Energy Systems (MES). However, for newcomers to this field, understanding how to achieve the desired optimization details while controlling computational expenses can be challenging and time-consuming. This paper presents a novel approach to analyzing the existing literature on MES, with the aim of guiding practical development of MES optimization. Through the discussion of six case studies, the authors provide a mathematical formulation as a reference for building the model and emphasize the impact of different aspects on the problem nature and solver selection. In addition, the paper also discusses the different approaches used in the literature for incorporating thermal networks and storage in the optimization of multi-energy systems.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xuepeng Yuan, Caiman Yan, Yunxian Huang, Yong Tang, Shiwei Zhang, Gong Chen
Summary: In this study, a multi-scale microgroove wick (MSMGW) was developed by laser irradiation, which demonstrated superior capillary performance. The surface morphology and performance of the wick were affected by laser scan pitch, laser power, repetition frequency, and scanning speed. The MSMGW showed optimal capillary performance in alumina material and DI water as the working fluid.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Maofei Mei, Feng Hu, Chong Han
Summary: This paper proposes an effective local search method based on detection of droplet boundaries for understanding the dynamic process of droplet growth during dropwise condensation. The method is validated by comparing with experimental data. The present simulation provides an effective approach to more accurately predict the nucleation site density in future studies.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rahul Kumar Sharma, Ashish Kumar, Dibakar Rakshit
Summary: The study explores the use of phase change materials (PCM) as a retrofit with Heating Ventilation and Air-conditioning systems (HVAC) to reduce energy consumption and improve air quality. By incorporating PCM with specific thickness and fin configurations, significant energy savings can be achieved in comparison to standard HVAC systems utilizing R134a. This research provides policymakers with energy-efficient and sustainable solutions for HVAC systems to combat climate change.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Zhenhua Ren, Xiangjin Meng, Xingang Qi, Hui Jin, Yunan Chen, Bin Chen, Liejin Guo
Summary: This paper investigates the heat transfer mechanism and factors influencing thermal radiation in the process of supercritical water gasification (SCWG) of coal, and proposes a comprehensive numerical model to simulate the process. Experimental validation results show that thermal radiation accounts for a significant proportion of the total heat exchange in the reactor and a large amount of radiant energy exists in the important spectral range of supercritical water. Enhancing radiative heat transfer can effectively increase the temperature of the reaction medium and the gasification rate.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Mauro Abela, Mauro Mameli, Sauro Filippeschi, Brent S. Taft
Summary: Pulsating Heat Pipes (PHP) are passive two-phase heat transfer devices with a simple structure and high heat transfer capabilities. The actual unpredictability of their dynamic behavior during startup and thermal crisis hinders their large-scale application. An experimental apparatus is designed to investigate these phenomena systematically. The results show that increasing the number of evaporator sections and condenser temperature improves the performance of PHP. The condenser temperature also affects the initial liquid phase distribution and startup time.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Ke Gan, Ruilian Li, Yi Zheng, Hui Xu, Ying Gao, Jiajie Qian, Ziming Wei, Bin Kong, Hong Zhang
Summary: A 3-dimensional enhanced heat pipe radiator has been developed to improve heat dissipation and temperature uniformity in cooling high-power electronic components. Experimental results show that the radiator has superior heat transfer performance compared to a conventional aluminum fin radiator under different heating powers and wind speed conditions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xinyi Zhang, Shuzhong Wang, Daihui Jiang, Zhiqiang Wu
Summary: This study focuses on recovering waste heat from blast furnace slag using dry centrifugal pelletizing technology. A comprehensive two-dimensional model was developed to analyze heat transfer dynamics and investigate factors influencing heat exchange efficiency. The findings have important implications for optimizing waste heat recovery and ensuring safe operations.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xincheng Wu, An Zou, Qiang Zhang, Zhaoguang Wang
Summary: The boosting heat generation rate of high-performance processors is challenging traditional cooling techniques. This study proposes a combined design of active jet intermittency and passive surface modification to enhance heat transfer.
APPLIED THERMAL ENGINEERING
(2024)