1115 Numerical Simulations of Single Bubble Dynamics Accompanied with Phase Change Based on Molecular Gas Dynamics(1)

2007 ◽  
Vol 2007 (0) ◽  
pp. _1115-a_
Author(s):  
Kazumichi KOBAYASHI ◽  
Hiroyuki TAKAHIRA
Keyword(s):  
Phase Change ◽  
Numerical Simulations ◽  
Gas Dynamics ◽  
Bubble Dynamics ◽  
Single Bubble ◽  
Molecular Gas ◽  
Single Bubble Dynamics

scholarly journals A model for the effect of bulk liquid viscosity on cavitation bubble dynamics

2017 ◽  
Vol 19 (31) ◽  
pp. 20635-20640 ◽  
Author(s):  
Yang Shen ◽  
Kyuichi Yasui ◽  
Tong Zhu ◽  
Muthupandian Ashokkumar
Keyword(s):  
Experimental Data ◽  
Numerical Simulations ◽  
Cavitation Bubble ◽  
Bubble Dynamics ◽  
Single Bubble ◽  
Bulk Liquid ◽  
Liquid Viscosity ◽  
Single Bubble Dynamics ◽  
Theoretical Results

The effect of bulk liquid viscosity on single bubble dynamics has been investigated using numerical simulations. The theoretical results obtained are supported by the published experimental data.

Numerical Investigation of Single Bubble Dynamics Passing a Mesh-Based Structure

2020 ◽  
Author(s):  
Fadi Alnaimat ◽  
Bobby Mathew ◽  
Omar Alhammadi
Keyword(s):  
Bubble Dynamics ◽  
Cfd Simulation ◽  
Single Bubble ◽  
Separation Mechanism ◽  
Mesh Structure ◽  
Flow Restriction ◽  
Complex Interactions ◽  
Vof Model ◽  
Single Bubble Dynamics ◽  
Physical Features

Abstract In this article, investigations of the dynamic behaviors of a single bubble flowing across a mesh-based structure domain was conducted using the volume of fluid (VOF) model. The study was investigated in various mesh structure sizes, including hole size and gap distance. The fundamental behavior of bubble deformation and the effects of gap sizes were analyzed. Subsequently, the predicted dynamics of the deforming bubble area and the effect of the surface tension were examined inside the mesh holes. The discharging bubbles from the mesh structure resulted in a slight difference in the physical features from the original bubble dynamics before entering the mesh (flow restriction). This drafted the bubbles in different trajectories and led to behave differently based on the mesh characteristics. The complex interactions and the subsequent deformations were observed between different mesh sizes. For the validation of the bubble dynamics, the results of computational fluid dynamics (CFD) simulation were tested under different mesh sizes detailing the velocity field, exiting trajectory, bubbles deformation, and residence time, which helps to reveal the affected parameters on the separation mechanism of the original bubble.

Nonlinear Phenomena in Rayleigh-Plesset Equations for Single Bubble Dynamics

2011 ◽  
Author(s):  
Shohei Shikada ◽  
Hiroaki Yoshimura ◽  
Jiachun Li ◽  
Song Fu
Keyword(s):  
Bubble Dynamics ◽  
Single Bubble ◽  
Nonlinear Phenomena ◽  
Single Bubble Dynamics

scholarly journals Single–bubble dynamics in histotripsy and high–amplitude ultrasound: Modeling and validation

2020 ◽  
Vol 65 (22) ◽  
pp. 225014 ◽  
Author(s):  
Lauren Mancia ◽  
Mauro Rodriguez ◽  
Jonathan Sukovich ◽  
Zhen Xu ◽  
Eric Johnsen
Keyword(s):  
Bubble Dynamics ◽  
High Amplitude ◽  
Single Bubble ◽  
Single Bubble Dynamics

Numerical Study of Single Bubble Dynamics During Flow Boiling

2007 ◽  
Vol 129 (7) ◽  
pp. 864-876 ◽  
Author(s):  
Ding Li ◽  
Vijay K. Dhir
Keyword(s):  
Bubble Dynamics ◽  
Numerical Study ◽  
Flow Boiling ◽  
Three Dimensional ◽  
Horizontal Surface ◽  
Single Bubble ◽  
Bulk Liquid ◽  
Interface Heat Transfer ◽  
Single Bubble Dynamics ◽  
Energy Equations

Three-dimensional numerical simulation of single bubble dynamics during nucleate flow boiling is performed in this work. The range of bulk liquid velocities investigated is from 0.076to0.23m∕s. The surface orientations at earth normal gravity are varied from an upward facing horizontal surface to vertical through 30, 45, and 60deg. The gravity levels on an upward facing horizontal surface are varied from 1.0ge to 0.0001ge. Continuity, momentum, and energy equations are solved by finite difference method and the level set method is used to capture the liquid-vapor interface. Heat transfer within the liquid micro layer is included in this model. The numerical results have been compared with data from experiments. The results show that the bulk flow velocity, heater surface orientation, and gravity levels influence the bubble dynamics.

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