Article
Thermodynamics
Haoyu Ding, Jin Zhao, Zhenyu Zhang, Kai Xu, Luxin Fu, Xu He
Summary: The factors influencing the formation of impinged spray are analyzed using computational fluid dynamics (CFD) modeling. Free spray and impinging sprays with three impinging distances are simulated using the Eulerian-Lagrangian multiphase method. The results are validated with experimental data. The impact of air flow, generated by gas entrainment of spray, also influences the spray.
Article
Thermodynamics
Jorge Duarte Benther, Vrushub Bhatt, Juan Diego Pelaez Restrepo, Cameron Stanley, Gary Rosengarten
Summary: High heat generation in the electronics industry hampers further innovations. Spray cooling is a promising technique for cooling high-temperature objects. This study investigates the fluid dynamics and heat transfer of multiple droplet impingement, providing insights for future spray cooling system design and optimization.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Review
Thermodynamics
J. D. Benther, J. D. Pelaez-Restrepo, C. Stanley, G. Rosengarten
Summary: This article discusses the application of spray cooling and multiple droplet impingement heat transfer technology in improving spray cooling efficiency. Research shows that enhanced surfaces can enhance the outcome of spray cooling, but further studies are still needed to investigate the effects under different conditions.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Environmental Sciences
Tine Seljak, Urban Zvar Baskovic, Ziga Rosec, Tomaz Katrasnik
Summary: This paper presents a novel approach for combustion control in gas turbines and burners by injecting inert components in the spray core. The method can reduce NO and PM emissions and improve fuel flexibility. Experimental results show significant advantages compared to traditional methods.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Metallurgy & Metallurgical Engineering
Petr Kotrbacek, Hana Bellerova, Tomas Luks, Miroslav Raudensky
Summary: The research presented in this paper focuses on spray cooling of hot surfaces, specifically in the context of continuous casting. A correlation for Heat Transfer Coefficient (HTC) is proposed, taking into account both water impingement density and impact pressure. The study demonstrates that equations based solely on water impingement density cannot accurately predict HTC.
STEEL RESEARCH INTERNATIONAL
(2021)
Article
Engineering, Chemical
Yu Wang, Lin Ruan
Summary: The CCSSECAC system combines spray evaporative cooling and air cooling to enhance the cooling performance of an air-cooled electric machine. By using ultrasonic atomization to produce tiny droplets, the system's effectiveness in reducing temperature was verified through experimental results for horizontal machines.
Article
Thermodynamics
Hyundo Park, Jiwon Roh, Kwang Cheol Oh, Hyungtae Cho, Junghwan Kim
Summary: In this study, a CFD model was developed to determine the optimal amount of water sprayed in a water mist system for air-cooled heat exchangers (ACHEs). The cooling effect and water evaporation ratio were calculated based on the amount of water sprayed and ambient air temperature. The results showed that the required amount of water to achieve the target cooling effect and complete water evaporation were 3.364 kg/h and 7.928 kg/h at different ambient air temperatures. This study is significant for optimizing the water mist system in commercial processes.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Construction & Building Technology
Elisa Di Giuseppe, Giulia Ulpiani, Claudia Cancellieri, Costanzo Di Perna, Marco D'Orazio, Michele Zinzi
Summary: This study simulated a misting system in Rome using a 3D microclimatic model in ENVI-met, revealing the impact of key design parameters on the cooling effect. The results showed that significant thermal drops tended to occur close but out of the misted perimeter following the wind direction, with cooling effects further stretched for tens of meters.
ENERGY AND BUILDINGS
(2021)
Article
Materials Science, Multidisciplinary
Jan Bohacek, Miroslav Raudensky, Petr Kotrbacek
Summary: A novel method of cooling rolls in hot rolling using a combination of vanes and nozzles has been proposed, showing similar cooling efficiency and broad application potential in various technological processes.
Article
Energy & Fuels
Dongfang Wang, Zhongjie Shi, Ziming Yang, Haiyan Chen, Manlin Wang, Yikai Li
Summary: The heat transfer between the wall and spray has a significant impact on the ignition characteristics of diesel engines. The interaction between the spray and wall leads to smaller droplet size and more small and large droplets compared to free spray. This interaction increases the total surface area of the droplets and promotes heat transfer, which is beneficial for the ignition process. However, when the wall temperature is low, the spray is cooled by the wall, inhibiting ignition.
Article
Chemistry, Physical
Sijie Wang, Pei Xu, Yongzhi Zhou, Huamei Duan, Dengfu Chen, Mujun Long
Summary: The mold structure and cooling parameters greatly affect the heat transfer capacity of high-speed continuous casting molds of billets. By establishing a three-dimensional fluid flow and heat transfer model of a 160 mm x 160 mm billet mold and verifying its accuracy, the characteristics of heat transfer and the influences of mold structure and cooling parameters on heat transfer in the high-speed continuous casting billet mold region were revealed. It was found that extending the effective length of the mold is the most valuable method to improve its heat transfer capability and achieve high-speed continuous casting. Increasing the fillet radius can enhance the uniformity of heat transfer in the mold. The optimal fillet radius of the mold was determined to be R = 10 mm considering the loss of material.
Article
Thermodynamics
P. Kotrbacek, M. Chabicovsky, J. Kominek, O. Resl, H. Bellerova
Summary: This paper investigates the influence of water temperature on spray cooling and provides correlations and transformation functions to extend existing correlations. It fills the research gap by presenting generalized results.
APPLIED THERMAL ENGINEERING
(2022)
Review
Thermodynamics
Sameer Khandekar, Gopinath Sahu, K. Muralidhar, Elizaveta Ya Gatapova, Oleg A. Kabov, Run Hu, Xiaobing Luo, Liang Zhao
Summary: LEDs are popular for their wide applicability, but high-power LEDs bring challenges in heat management. Liquid jets and sprays are potential solutions for thermal management, with liquid sprays posing challenges in flow parameter management and transport physics.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
M. V. V. Srinivas, Mudragada Hari Surya, Devendra Pratap Singh, Pratibha Biswal, Sathi Rajesh Reddy
Summary: The purpose of this study is to explore the mist-air film cooling performance on a three-dimensional (3-D) flat plate. In mist-air film cooling technique, a small amount of water droplets is injected along with the coolant air. The objective is to study the influence of shape of the coolant hole and operating conditions on the cooling effectiveness.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2023)
Article
Energy & Fuels
Chu-Qi Su, Shuo Wang, Xun Liu, Qi Tao, Yi-Ping Wang
Summary: In this study, a method of spray cooling the radiator using water produced by the fuel cell was proposed to address the heat transfer problem in fuel cell vehicles during climbing and high temperature conditions. A test bench was constructed to evaluate the effectiveness of this method and determine the optimal spray working conditions. Numerical simulation and experimental verification were conducted to study the convective heat transfer coefficient of the radiator's air side. The results demonstrated that inclined spray was more effective than vertical spray, and the numerical simulation process provided valuable reference for the design of fuel cell vehicle spray cooling system.
Article
Metallurgy & Metallurgical Engineering
Ping Zhou, Hai-bo Ma, Zi-wei Xie, Hong-jie Yan, Chenn Q. Zhou
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2017)
Article
Metallurgy & Metallurgical Engineering
Haibo Ma, Justina Lee, Kaile Tang, Rui Liu, Michael Lowry, Armin Silaen, Chenn Q. Zhou
STEEL RESEARCH INTERNATIONAL
(2019)
Article
Thermodynamics
Haibo Ma, Armin A. Silaen, Chenn Q. Zhou
Summary: Continuous casting is a crucial process in solidifying molten steel, where efficient and uniform cooling without causing cracking or deformation is a major challenge. Through the use of computational fluid dynamics, a numerical model for spray cooling has been developed to enhance the process.
JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Haibo Ma, Armin Silaen, Chenn Zhou
FRONTIERS IN MATERIALS
(2020)
Article
Computer Science, Interdisciplinary Applications
Haibo Ma, Shilei Ma, Robert Moss, Mark Fisher, Armin K. Silaen, Chenn Q. Zhou
Summary: Accurate measurement of volumetric flowrate is crucial in various applications. Dwyer Instruments, Inc. developed an adjustable insertion electromagnetic flowmeter with precise measurement. However, non-repeatable behavior in the K-factor was observed during calibration. A magnetohydrodynamics model and parametric studies helped identify the issue and provide reliable solutions. The new design with embedded electrodes improved repeatability and reduced calibration time.
JOURNAL OF COMPUTING AND INFORMATION SCIENCE IN ENGINEERING
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
John Resa, Matthew Moore, Xiang Zhou, Haibo Ma, Armin K. Silaen, Chenn Q. Zhou
TMS 2020 149TH ANNUAL MEETING & EXHIBITION SUPPLEMENTAL PROCEEDINGS
(2020)