A three-dimensional modeling for coalescence of multiple cavitation bubbles near a rigid wall

Rui Han, Longbin Tao, A-Man Zhang, Shuai Li

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The Boundary Integral Method (BIM) has been widely and successfully applied to cavitation bubble dynamics; however, the physical complexities involved in the coalescence of multiple bubbles are still challenging for numerical modeling. In this study, an improved three-dimensional (3D) BIM model is developed to simulate the coalescence of multiple cavitation bubbles near a rigid wall, including an extreme situation when cavitation bubbles are in contact with the rigid wall. As the first highlight of the present model, a universal topological treatment for arbitrary coalescence is proposed for 3D cases, combined with a density potential method and an adaptive remesh scheme to maintain a stable and high-accuracy calculation. Modeling for the multiple bubbles attached to the rigid boundary is the second challenging task of the present study. The effects of the rigid wall are modeled using the method of image; thus, the boundary value problem is transformed to the coalescence of real bubbles and their images across the boundary. Additionally, the numerical difficulties associated with the splitting of a toroidal bubble and self-coalescence due to the self-film-thinning process of a coalesced bubble are successfully overcome. The present 3D model is verified through convergence studies and further validated by the purposely conducted experiments. Finally, representative simulations are carried out to elucidate the main features of a coalesced bubble near a rigid boundary and the flow fields are provided to reveal the underlying physical mechanisms.

LanguageEnglish
Article number062107
Number of pages17
JournalPhysics of Fluids
Volume31
Issue number6
DOIs
Publication statusPublished - 19 Jun 2019

Fingerprint

cavitation flow
Bubbles (in fluids)
Coalescence
Cavitation
coalescing
bubbles
boundary integral method
Contacts (fluid mechanics)
Boundary value problems
Flow fields
boundary value problems
flow distribution
Experiments

Keywords

  • cavitation bubble
  • bubble collapse
  • bubble clusters

Cite this

@article{c47cb5294335471bbd9282a1edbf6840,
title = "A three-dimensional modeling for coalescence of multiple cavitation bubbles near a rigid wall",
abstract = "The Boundary Integral Method (BIM) has been widely and successfully applied to cavitation bubble dynamics; however, the physical complexities involved in the coalescence of multiple bubbles are still challenging for numerical modeling. In this study, an improved three-dimensional (3D) BIM model is developed to simulate the coalescence of multiple cavitation bubbles near a rigid wall, including an extreme situation when cavitation bubbles are in contact with the rigid wall. As the first highlight of the present model, a universal topological treatment for arbitrary coalescence is proposed for 3D cases, combined with a density potential method and an adaptive remesh scheme to maintain a stable and high-accuracy calculation. Modeling for the multiple bubbles attached to the rigid boundary is the second challenging task of the present study. The effects of the rigid wall are modeled using the method of image; thus, the boundary value problem is transformed to the coalescence of real bubbles and their images across the boundary. Additionally, the numerical difficulties associated with the splitting of a toroidal bubble and self-coalescence due to the self-film-thinning process of a coalesced bubble are successfully overcome. The present 3D model is verified through convergence studies and further validated by the purposely conducted experiments. Finally, representative simulations are carried out to elucidate the main features of a coalesced bubble near a rigid boundary and the flow fields are provided to reveal the underlying physical mechanisms.",
keywords = "cavitation bubble, bubble collapse, bubble clusters",
author = "Rui Han and Longbin Tao and A-Man Zhang and Shuai Li",
year = "2019",
month = "6",
day = "19",
doi = "10.1063/1.5097929",
language = "English",
volume = "31",
journal = "Physics of Fluids",
issn = "1070-6631",
number = "6",

}

A three-dimensional modeling for coalescence of multiple cavitation bubbles near a rigid wall. / Han, Rui; Tao, Longbin; Zhang, A-Man; Li, Shuai.

In: Physics of Fluids, Vol. 31, No. 6, 062107, 19.06.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A three-dimensional modeling for coalescence of multiple cavitation bubbles near a rigid wall

AU - Han, Rui

AU - Tao, Longbin

AU - Zhang, A-Man

AU - Li, Shuai

PY - 2019/6/19

Y1 - 2019/6/19

N2 - The Boundary Integral Method (BIM) has been widely and successfully applied to cavitation bubble dynamics; however, the physical complexities involved in the coalescence of multiple bubbles are still challenging for numerical modeling. In this study, an improved three-dimensional (3D) BIM model is developed to simulate the coalescence of multiple cavitation bubbles near a rigid wall, including an extreme situation when cavitation bubbles are in contact with the rigid wall. As the first highlight of the present model, a universal topological treatment for arbitrary coalescence is proposed for 3D cases, combined with a density potential method and an adaptive remesh scheme to maintain a stable and high-accuracy calculation. Modeling for the multiple bubbles attached to the rigid boundary is the second challenging task of the present study. The effects of the rigid wall are modeled using the method of image; thus, the boundary value problem is transformed to the coalescence of real bubbles and their images across the boundary. Additionally, the numerical difficulties associated with the splitting of a toroidal bubble and self-coalescence due to the self-film-thinning process of a coalesced bubble are successfully overcome. The present 3D model is verified through convergence studies and further validated by the purposely conducted experiments. Finally, representative simulations are carried out to elucidate the main features of a coalesced bubble near a rigid boundary and the flow fields are provided to reveal the underlying physical mechanisms.

AB - The Boundary Integral Method (BIM) has been widely and successfully applied to cavitation bubble dynamics; however, the physical complexities involved in the coalescence of multiple bubbles are still challenging for numerical modeling. In this study, an improved three-dimensional (3D) BIM model is developed to simulate the coalescence of multiple cavitation bubbles near a rigid wall, including an extreme situation when cavitation bubbles are in contact with the rigid wall. As the first highlight of the present model, a universal topological treatment for arbitrary coalescence is proposed for 3D cases, combined with a density potential method and an adaptive remesh scheme to maintain a stable and high-accuracy calculation. Modeling for the multiple bubbles attached to the rigid boundary is the second challenging task of the present study. The effects of the rigid wall are modeled using the method of image; thus, the boundary value problem is transformed to the coalescence of real bubbles and their images across the boundary. Additionally, the numerical difficulties associated with the splitting of a toroidal bubble and self-coalescence due to the self-film-thinning process of a coalesced bubble are successfully overcome. The present 3D model is verified through convergence studies and further validated by the purposely conducted experiments. Finally, representative simulations are carried out to elucidate the main features of a coalesced bubble near a rigid boundary and the flow fields are provided to reveal the underlying physical mechanisms.

KW - cavitation bubble

KW - bubble collapse

KW - bubble clusters

U2 - 10.1063/1.5097929

DO - 10.1063/1.5097929

M3 - Article

VL - 31

JO - Physics of Fluids

T2 - Physics of Fluids

JF - Physics of Fluids

SN - 1070-6631

IS - 6

M1 - 062107

ER -