Computational Studies of Air-Mist Spray Cooling in Continuous Casting

Due to the significant reduction in water droplet size caused by the strong air-water interaction in the spray nozzle, air-mist spray is one of the promising technologies for achieving high-rate heat transfer. This study numerically analyzed air-mist spray produced by a flat-fan atomizer using three...

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Autores principales:	Vitalis Anisiuba, Haibo Ma, Armin Silaen, Chenn Zhou
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	air-mist spray atomization continuous casting impingement cooling heat transfer coefficient Technology T
Acceso en línea:	https://doaj.org/article/5340f1b7a26f4d81920684f4977e8401
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spelling	oai:doaj.org-article:5340f1b7a26f4d81920684f4977e84012021-11-11T16:03:44ZComputational Studies of Air-Mist Spray Cooling in Continuous Casting10.3390/en142173391996-1073https://doaj.org/article/5340f1b7a26f4d81920684f4977e84012021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7339https://doaj.org/toc/1996-1073Due to the significant reduction in water droplet size caused by the strong air-water interaction in the spray nozzle, air-mist spray is one of the promising technologies for achieving high-rate heat transfer. This study numerically analyzed air-mist spray produced by a flat-fan atomizer using three-dimensional computational fluid dynamics simulations, and a multivariable linear regression was used to develop a correlation to predict the heat transfer coefficient using the casting operating conditions such as air-pressure, water flow rate, casting speed, and standoff distance. A four-step simulation approach was used to simulate the air-mist spray cooling capturing the turbulence and mixing of the two fluids in the nozzle, droplet formation, droplet transport and impingement heat transfer. Validations were made on the droplet size and on the VOF-DPM model which were in good agreement with experimental results. A 33% increase in air pressure increases the lumped HTC by 3.09 ± 2.07% depending on the other casting parameters while an 85% increase in water flow rate reduces the lumped HTC by 4.61 ± 2.57%. For casting speed, a 6.5% decrease in casting speed results in a 1.78 ± 1.42% increase in the lumped HTC. The results from this study would provide useful information in the continuous casting operations and optimization.Vitalis AnisiubaHaibo MaArmin SilaenChenn ZhouMDPI AGarticleair-mist sprayatomizationcontinuous castingimpingement coolingheat transfer coefficientTechnologyTENEnergies, Vol 14, Iss 7339, p 7339 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	air-mist spray atomization continuous casting impingement cooling heat transfer coefficient Technology T
spellingShingle	air-mist spray atomization continuous casting impingement cooling heat transfer coefficient Technology T Vitalis Anisiuba Haibo Ma Armin Silaen Chenn Zhou Computational Studies of Air-Mist Spray Cooling in Continuous Casting
description	Due to the significant reduction in water droplet size caused by the strong air-water interaction in the spray nozzle, air-mist spray is one of the promising technologies for achieving high-rate heat transfer. This study numerically analyzed air-mist spray produced by a flat-fan atomizer using three-dimensional computational fluid dynamics simulations, and a multivariable linear regression was used to develop a correlation to predict the heat transfer coefficient using the casting operating conditions such as air-pressure, water flow rate, casting speed, and standoff distance. A four-step simulation approach was used to simulate the air-mist spray cooling capturing the turbulence and mixing of the two fluids in the nozzle, droplet formation, droplet transport and impingement heat transfer. Validations were made on the droplet size and on the VOF-DPM model which were in good agreement with experimental results. A 33% increase in air pressure increases the lumped HTC by 3.09 ± 2.07% depending on the other casting parameters while an 85% increase in water flow rate reduces the lumped HTC by 4.61 ± 2.57%. For casting speed, a 6.5% decrease in casting speed results in a 1.78 ± 1.42% increase in the lumped HTC. The results from this study would provide useful information in the continuous casting operations and optimization.
format	article
author	Vitalis Anisiuba Haibo Ma Armin Silaen Chenn Zhou
author_facet	Vitalis Anisiuba Haibo Ma Armin Silaen Chenn Zhou
author_sort	Vitalis Anisiuba
title	Computational Studies of Air-Mist Spray Cooling in Continuous Casting
title_short	Computational Studies of Air-Mist Spray Cooling in Continuous Casting
title_full	Computational Studies of Air-Mist Spray Cooling in Continuous Casting
title_fullStr	Computational Studies of Air-Mist Spray Cooling in Continuous Casting
title_full_unstemmed	Computational Studies of Air-Mist Spray Cooling in Continuous Casting
title_sort	computational studies of air-mist spray cooling in continuous casting
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5340f1b7a26f4d81920684f4977e8401
work_keys_str_mv	AT vitalisanisiuba computationalstudiesofairmistspraycoolingincontinuouscasting AT haiboma computationalstudiesofairmistspraycoolingincontinuouscasting AT arminsilaen computationalstudiesofairmistspraycoolingincontinuouscasting AT chennzhou computationalstudiesofairmistspraycoolingincontinuouscasting
_version_	1718432412761849856

Computational Studies of Air-Mist Spray Cooling in Continuous Casting

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