Computational Studies of Air-Mist Spray Cooling in Continuous Casting

Vitalis Anisiuba, Haibo Ma, Armin Silaen and Chenn Zhou
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Vitalis Anisiuba: Center for Innovation through Visualization and Simulation (CIVS), Purdue University Northwest, Hammond, IN 46323, USA
Haibo Ma: Center for Innovation through Visualization and Simulation (CIVS), Purdue University Northwest, Hammond, IN 46323, USA
Armin Silaen: Center for Innovation through Visualization and Simulation (CIVS), Purdue University Northwest, Hammond, IN 46323, USA
Chenn Zhou: Center for Innovation through Visualization and Simulation (CIVS), Purdue University Northwest, Hammond, IN 46323, USA

Energies, 2021, vol. 14, issue 21, 1-27

Abstract: 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.

Keywords: air-mist spray; atomization; continuous casting; impingement cooling; heat transfer coefficient (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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