Article
Engineering, Chemical
Ibrahim Elbadawy, Abdulaziz Alhajri, Mohammad Doust, Yousef Almulla, Mohamed Fayed, Ali Dinc, Mohamed Abouelela, Ibrahim Mahariq, Wael Al-Kouz
Summary: In this study, the fluid flow and heat transfer characteristics of different nanofluids and micro-channel heat sink configurations were numerically investigated. The results revealed that the heat transfer coefficient of Al2O3-H2O nanofluid was higher than other nanoparticles and pure water, with an improvement of 8.58% at Re=1500 and 7% concentration. It was also found that the triangular micro-channel heat sink had the highest heat transfer coefficient but the highest pressure drop due to its smallest hydraulic diameter.
Article
Thermodynamics
David O. Ariyo, Tunde Bello-Ochende
Summary: In this study, the constructal design of high heat flux two-stacked horizontal microchannel heat sinks for cooling of electronic devices was presented, utilizing ANSYS Computational Fluid Dynamics (CFD) code for subcooled nucleate boiling. The validation of the CFD code was done via comparison with experimental data, showing accurate prediction of subcooled flow boiling for microelectronic device cooling. The results indicate that optimal two-stacked microchannel heat sinks operating in subcooled flow boiling could be considered as a viable alternative in the cooling of electronics, with good CHF performance in counterflow and parallel flow arrangements.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Review
Energy & Fuels
Zabdur Rehman, Faraz Ahmad, Hafiz Ali Muhammad, Fahid Riaz, Hafiz Muhammad Uzair Ayub, Mudassir Hasan, Moonyong Lee
Summary: The sustainability and economic development are closely related to energy consumption and conversion processes. With the increasing demand for energy consumption and environmental concerns, the need for miniaturized light-weight heat exchangers with high efficiency and adequate heat transfer characteristics has become crucial. Traditional heat exchangers are not suitable anymore and there have been various researches to improve the performance of miniaturized heat exchangers.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Thermodynamics
Farzad Pourfattah, Lianping Wang, Wei-Mon Yan, Victoria Timchenko
Summary: Supercritical CO2 is a suitable coolant with favorable thermodynamic characteristics, but its thermohydraulic performance in high heat flux conditions depends on temperature and heat flux variations.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Thermodynamics
Jonathan Valentin-Reyes, Maria I. Leon, Tzayam Perez, Tatiana Romero-Castanon, Jose Beltran, Jose R. Flores-Hernandez, Jose Luis Nava
Summary: This short communication discusses the design of an interdigitated flow channel in a PEMFC and evaluates its performance using CFD simulations and experiments. The results show good agreement between experimental and simulated data at low current densities. This study provides valuable insights for the design and performance optimization of fuel cells.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Engineering, Environmental
Yorgos Stergiou, Kerstin Eckert, Karin Schwarzenberger
Summary: Hele-Shaw cells are commonly used in various fields, and the flow conditions near the inlet of a radial Hele-Shaw cell can significantly affect its technological applications. This study combines CFD and μPIV to explain the entrance phenomena in radial Hele-Shaw cells, providing valuable insights for future engineering applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Hongwei Li, Lei Wang, Changhe Du, Wenpeng Hong
Summary: Under the influence of static electricity, pulsed gas flow can improve the fluidization performance of particle beds by reducing particle agglomeration. Different frequencies and gas flow ratios have significant impacts on flow characteristics, with 2.5 Hz frequency showing the most obvious effect.
Article
Chemistry, Analytical
Heng Zhao, Honghua Ma, Xiang Yan, Huaqing Yu, Yongjun Xiao, Xiao Xiao, Hui Liu
Summary: This research paper investigates the laminar flow and heat transfer characteristics of a micro-channel heat sink with a variable geometry rectangular fin through computational fluid dynamics analysis. The results show that the heat sink with a variable geometry rectangular fin has better heat dissipation capacity but also larger pressure loss.
Article
Thermodynamics
Haluk Anil Kose, Alperen Yildizeli, Sertac Cadirci
Summary: This study numerically investigates laminar single-phase fluid flow and conjugate heat transfer for three different shapes of microchannel heat sinks using Computational Fluid Dynamics (CFD). The study reveals the optimal geometric design variables for efficient microchannel heat sink designs. The results show that the rectangular microchannel configuration has the highest thermal and hydrodynamic performance among the three configurations.
APPLIED THERMAL ENGINEERING
(2022)
Article
Chemistry, Analytical
Concepcion Paz, Eduardo Suarez, Adrian Cabarcos, Antonio Diaz
Summary: This paper investigates the pressure drop in an ORC shell-and-tubes boiler for a WHRS experiment using both experimental and computational methods, and achieves good agreement between the two.
Article
Nuclear Science & Technology
Shuang Xia, Xuhua Zhou, Gaojie Hu, Xiaxin Cao
Summary: This study aims to analyze the thermal-hydraulic behavior of a rectangular fuel assembly with 80% blockage in one subchannel using STAR-CCM software. It is found that single-side blockage redistributes mass flow rate and causes local vortices, leading to slightly increased damage as the blockage height rises.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2021)
Article
Thermodynamics
Javad Mohammadpour, Fatemeh Salehi, Ann Lee
Summary: This study analyzes the hydrodynamic and heat transfer performance of the nano encapsulated phase change material (NEPCM) slurry in a microchannel heat sink equipped with two circular synthetic jets. The results show that parameters such as NEPCM concentration, frequency, and amplitude have a significant impact on energy efficiency, and changes in these parameters can improve convective heat transfer performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Multidisciplinary Sciences
Tahir Abbas Jauhar, Muhammad Imtiaz Hussain, Tayybah Kiren, Waseem Arif, Sajjad Miran, Gwi Hyun Lee
Summary: Power augmentation in a small-scale horizontal axis wind turbine with a flanged diffuser was studied. The power output of the wind turbine depends on the diffuser design and resulting back pressure. Numerical investigation was conducted to analyze the local configuration inside the diffuser by varying diffuser angles and wind speeds. Experimental validation was performed at two wind speeds, showing a wind speed improvement of up to 1.68 times compared to the baseline configuration. The optimal flange height was found to be 250mm and the dimensionless location of the wind turbine varied with divergence angle.
Article
Engineering, Electrical & Electronic
Vanessa Mendes Renno, Jose Candido Silveira Santos Filho
Summary: In this study, a unified simulation method is proposed for α-μ, η-μ, and κ-μ fading models. The method can accommodate full-range values of all fading parameters and accurately match the first-order statistics while approximating the second-order statistics well. Analytical expressions and optimized simulation parameters are derived to improve the match for the second-order statistics. Useful series representations and asymptotic expressions for essential first- and second-order statistics are obtained. The results are fully validated through Monte Carlo simulation.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Chemical
Krystian Jedrzejczak, Arkadiusz Antonowicz, Lukasz Makowski, Wojciech Orciuch, Krzysztof Wojtas, Michal Kozlowski
Summary: We aimed to verify the relationship between blood vessel shape and hemolysis risk by using a blood rheological model that considers physiological processes related to blood flow. The model predicted red blood cell concentration and agglomerate size, important factors affecting blood rheology and hemolysis. We compared computational fluid dynamics simulation results with experimental measurements to establish a correlation function between vessel shape, flow rate, and maximum shear stress, which governs hemolysis. This study successfully applied chemical engineering methodology to analyze biological systems and has the potential to be implemented in medical practice for quickly assessing hemolysis risk.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Review
Engineering, Electrical & Electronic
S. K. Singh, H. S. Mali
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2019)
Article
Materials Science, Composites
Rachit Omer, Harlal Singh Mali, Siddhartha Kumar Singh
PLASTICS RUBBER AND COMPOSITES
(2020)
Article
Engineering, Chemical
Siddhartha Kumar Singh, Harlal Singh Mali, Deepak Rajendra Unune, Szymon Wojciechowski, Dominik Wilczynski
Summary: In this study, two distinct nonparametric models (GRNN and GPR) were developed to predict the responses of micro-electric discharge machining (μ-EDM) process, and it was found that GPR outperforms GRNN. This research paves the way for the implementation of GPR in modeling and predicting the outputs of complex hybrid machining processes.
Review
Engineering, Multidisciplinary
P. S. Sourav, Shashank Singh, Anup Malik
Summary: The electrochemical discharge machining (ECDM) process combines electric discharge machining and electrochemical machining to overcome the limitations of other machining technologies on non-conducting materials. This review article discusses the effects of input parameters on machining performance, with different levels of applied voltage and electrolyte concentration resulting in varying machining rates and quality. Optimum process parameters for material removal rate and surface quality are also explored, as well as the various modifications and applications of the ECDM technique.
ENGINEERING RESEARCH EXPRESS
(2023)
Review
Thermodynamics
Shashank Singh, Anup Malik, Harlal Singh Mali
Summary: This article critically examines the research on modifications in geometry of channels for thermo-hydraulic performance enhancement and aims to determine the best channel configuration with optimal parameters. It explores various designs and their influencing parameters, as well as presents conclusions and potential recommendations for future research.
APPLIED THERMAL ENGINEERING
(2023)
Article
Multidisciplinary Sciences
S. K. Singh, H. S. Mali
Summary: This study experimentally evaluates the effect of vibration-assisted hybridization process on different materials and models the process outputs using Gaussian Process Regression. The results show that the effect of vibration is highly material specific, mainly reducing machining time, and leads to different surface morphologies for different materials.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
Proceedings Paper
Computer Science, Artificial Intelligence
H. S. Mali, Vivek Baghela, Siddhartha Kr Singh
ADVANCES IN SIMULATION, PRODUCT DESIGN AND DEVELOPMENT
(2020)
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)
