Direct numerical simulation study of droplet spreading on spherical particles

Evan Milacic, Maike Baltussen (Corresponding author), Hans Kuipers

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Direct Numerical Simulations have been performed to study the droplet spreading behaviour on a spherical surface. A coupled immersed boundary and volume of fluid method is used to represent the gas-liquid-solid interactions. The contact area of the droplet on the surface is recorded in order to fit the initial spreading with a power-law representation, using the contact-angle and interface curvature as fitting parameters. Small viscous droplets are used to reduce interfacial oscillations as well as low drop velocities to reduce impact forces. A decrease of spreading area with increasing curvature is observed. Moreover, the model shows good agreement compared to equilibrium states. A strong contact-angle dependence is found for the pre-factor of the power law, which is expected, and a linear decrease was found in the exponent for increasing curvature of the surface.
TaalEngels
Pagina's11-18
Aantal pagina's8
TijdschriftPowder Technology
Volume354
Vroegere onlinedatum28 mei 2019
DOI's
StatusGepubliceerd - 1 sep 2019

Vingerafdruk

Direct numerical simulation
Contact angle
Contacts (fluid mechanics)
Gases
Fluids
Liquids

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    title = "Direct numerical simulation study of droplet spreading on spherical particles",
    abstract = "Direct Numerical Simulations have been performed to study the droplet spreading behaviour on a spherical surface. A coupled immersed boundary and volume of fluid method is used to represent the gas-liquid-solid interactions. The contact area of the droplet on the surface is recorded in order to fit the initial spreading with a power-law representation, using the contact-angle and interface curvature as fitting parameters. Small viscous droplets are used to reduce interfacial oscillations as well as low drop velocities to reduce impact forces. A decrease of spreading area with increasing curvature is observed. Moreover, the model shows good agreement compared to equilibrium states. A strong contact-angle dependence is found for the pre-factor of the power law, which is expected, and a linear decrease was found in the exponent for increasing curvature of the surface.",
    keywords = "Curvature, DNS, Drop, Hydrodynamics, Particles, VOF-IBM",
    author = "Evan Milacic and Maike Baltussen and Hans Kuipers",
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    Direct numerical simulation study of droplet spreading on spherical particles. / Milacic, Evan; Baltussen, Maike (Corresponding author); Kuipers, Hans.

    In: Powder Technology, Vol. 354, 01.09.2019, blz. 11-18.

    Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

    TY - JOUR

    T1 - Direct numerical simulation study of droplet spreading on spherical particles

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    AU - Baltussen,Maike

    AU - Kuipers,Hans

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    N2 - Direct Numerical Simulations have been performed to study the droplet spreading behaviour on a spherical surface. A coupled immersed boundary and volume of fluid method is used to represent the gas-liquid-solid interactions. The contact area of the droplet on the surface is recorded in order to fit the initial spreading with a power-law representation, using the contact-angle and interface curvature as fitting parameters. Small viscous droplets are used to reduce interfacial oscillations as well as low drop velocities to reduce impact forces. A decrease of spreading area with increasing curvature is observed. Moreover, the model shows good agreement compared to equilibrium states. A strong contact-angle dependence is found for the pre-factor of the power law, which is expected, and a linear decrease was found in the exponent for increasing curvature of the surface.

    AB - Direct Numerical Simulations have been performed to study the droplet spreading behaviour on a spherical surface. A coupled immersed boundary and volume of fluid method is used to represent the gas-liquid-solid interactions. The contact area of the droplet on the surface is recorded in order to fit the initial spreading with a power-law representation, using the contact-angle and interface curvature as fitting parameters. Small viscous droplets are used to reduce interfacial oscillations as well as low drop velocities to reduce impact forces. A decrease of spreading area with increasing curvature is observed. Moreover, the model shows good agreement compared to equilibrium states. A strong contact-angle dependence is found for the pre-factor of the power law, which is expected, and a linear decrease was found in the exponent for increasing curvature of the surface.

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    KW - DNS

    KW - Drop

    KW - Hydrodynamics

    KW - Particles

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