Direct numerical simulation study of droplet spreading on spherical particles

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

Research output: Contribution to journalArticleAcademicpeer-review

23 Downloads (Pure)

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.
Original languageEnglish
Pages (from-to)11-18
Number of pages8
JournalPowder Technology
Volume354
Early online date28 May 2019
DOIs
Publication statusPublished - 1 Sep 2019

Fingerprint

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

Keywords

  • Curvature
  • DNS
  • Drop
  • Hydrodynamics
  • Particles
  • VOF-IBM

Cite this

@article{3463ad5405924b8aa58c5483da3b038c,
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",
year = "2019",
month = "9",
day = "1",
doi = "10.1016/j.powtec.2019.05.064",
language = "English",
volume = "354",
pages = "11--18",
journal = "Powder Technology",
issn = "0032-5910",
publisher = "Elsevier",

}

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, p. 11-18.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

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

AU - Milacic, Evan

AU - Baltussen, Maike

AU - Kuipers, Hans

PY - 2019/9/1

Y1 - 2019/9/1

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.

KW - Curvature

KW - DNS

KW - Drop

KW - Hydrodynamics

KW - Particles

KW - VOF-IBM

UR - http://www.scopus.com/inward/record.url?scp=85066779964&partnerID=8YFLogxK

U2 - 10.1016/j.powtec.2019.05.064

DO - 10.1016/j.powtec.2019.05.064

M3 - Article

AN - SCOPUS:85066779964

VL - 354

SP - 11

EP - 18

JO - Powder Technology

JF - Powder Technology

SN - 0032-5910

ER -