NUMERICAL INVESTIGATION OF THE IMPACT DYNAMICS OF A VISCOELASTIC DROPLET ON A SOLID SURFACE

H. Kwon; T. Ha; S. Shin

doi:10.6112/kscfe.2026.31.3.163

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2026 Vol.31, Issue 3 Preview Page Next Page

Original Article

NUMERICAL INVESTIGATION OF THE IMPACT DYNAMICS OF A VISCOELASTIC DROPLET ON A SOLID SURFACE 고체 표면에 충돌하는 점탄성 액적의 동역학적 거동에 대한 수치해석 연구

30 September 2026. pp. 163-173

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Abstract

Droplet impact on solid surfaces plays an important role in inkjet printing, spray coating, food processing, and biomedical applications. Although many studies have investigated Newtonian droplets, practical fluids often exhibit viscoelastic behavior, which makes the spreading dynamics more complex due to the generation and relaxation of elastic stress. In particular, the maximum spreading diameter of a viscoelastic droplet cannot be fully explained by conventional Newtonian-based models. In this study, the impact dynamics of a viscoelastic droplet on a solid surface are investigated using the Level Contour Reconstruction Method combined with the Oldroyd-B constitutive model. The effects of Reynolds number, solvent viscosity ratio, and Weissenberg number on the maximum spreading diameter are examined and compared with Newtonian fluid cases. The results show that the maximum spreading behavior of viscoelastic droplets is not governed solely by Reynolds number or total viscosity, but is also affected by the relative contribution and relaxation behavior of viscoelastic stress.

Keywords

액적 충돌(Droplet impact)

점탄성 액적(Viscoelastic droplet)

Oldroyd-B 모델(Oldroyd-B model)

최대 퍼짐 직경 (Maximum spreading diameter)

전산유체역학 (Computational Fluid Dynamics, CFD)

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Information

Publisher :Korean Society for Computational Fluids Engineering
Publisher(Ko) :한국전산유체공학회
Journal Title :Journal of Computational Fluids Engineering
Journal Title(Ko) :한국전산유체공학회지
Volume : 31
No :3
Pages :163-173
Received Date : 2026-08-10
Revised Date : 2026-09-14
Accepted Date : 2026-09-15
DOI :https://doi.org/10.6112/kscfe.2026.31.3.163

Journal of Computational Fluids Engineering ISSN:1598-6071(Print) 3022-6252(Online) 한국전산유체공학회지

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