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Flow Visualization in Materials ProcessingWettability Problems in Materials Processing

Flow Visualization in Materials Processing: Wettability Problems in Materials Processing [In a steelmaking process, micro particles such as calcium oxide (CaO, desulphurization chemical) are effectively injected into a molten iron bath and dispersed in the whole bath to enhance the efficiency of desulphurization or dephosphorization. However, the injected particles attract gas bubbles due to poor wettability with molten iron so that the dispersion in the bath could be inhibited. To achieve the effective dispersion of the injected particles, the dynamics of air cavity formed behind the particle entering the bath needs to be investigated. This chapter begins with the fundamentals of wettability about Young’s equation and models of Wenzel and Cassie–Baxter, Contact angle hysteresis. And then, we address the surface roughness on the coated plate of water-repellent material, the slip boundary condition related to Navier’s model, water entry problem of a coated sphere and circular cylinder. In addition, the bound motion of a water drop on an inclined plate coated of the water-repellent material.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Flow Visualization in Materials ProcessingWettability Problems in Materials Processing

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Publisher
Springer Japan
Copyright
© Springer Japan KK 2018
ISBN
978-4-431-56565-9
Pages
137 –182
DOI
10.1007/978-4-431-56567-3_7
Publisher site
See Chapter on Publisher Site

Abstract

[In a steelmaking process, micro particles such as calcium oxide (CaO, desulphurization chemical) are effectively injected into a molten iron bath and dispersed in the whole bath to enhance the efficiency of desulphurization or dephosphorization. However, the injected particles attract gas bubbles due to poor wettability with molten iron so that the dispersion in the bath could be inhibited. To achieve the effective dispersion of the injected particles, the dynamics of air cavity formed behind the particle entering the bath needs to be investigated. This chapter begins with the fundamentals of wettability about Young’s equation and models of Wenzel and Cassie–Baxter, Contact angle hysteresis. And then, we address the surface roughness on the coated plate of water-repellent material, the slip boundary condition related to Navier’s model, water entry problem of a coated sphere and circular cylinder. In addition, the bound motion of a water drop on an inclined plate coated of the water-repellent material.]

Published: Oct 6, 2017

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