Numerical study on the bubble dynamics in a broken confined domain

2020 ◽  
Vol 32 (6) ◽  
pp. 1029-1042
Author(s):  
Hao Tang ◽  
Yun-Long Liu ◽  
Pu Cui ◽  
A.-Man Zhang
Keyword(s):  
Bubble Dynamics ◽  
Numerical Study

NUMERICAL STUDY OF BUBBLE DYNAMICS ON SURFACE WITH SWITCHABLE WETTABILITY

2018 ◽  
Author(s):  
Lei Zhang ◽  
Tao Wang ◽  
SeolHa Kim ◽  
Yuyan Jiang
Keyword(s):  
Bubble Dynamics ◽  
Numerical Study

Numerical study on ring bubble dynamics in a narrow cylinder with a compliant coating

2015 ◽  
Vol 47 (2) ◽  
pp. 025508 ◽  
Author(s):  
V Farhangmehr ◽  
M T Shervani-Tabar ◽  
R Parvizi ◽  
S W Ohl ◽  
B C Khoo
Keyword(s):  
Bubble Dynamics ◽  
Numerical Study ◽  
Compliant Coating

A numerical study on bubble dynamics in sinusoidal channels

2019 ◽  
Vol 31 (5) ◽  
pp. 052103 ◽  
Author(s):  
Tejas Patel ◽  
Darshan Patel ◽  
Nihar Thakkar ◽  
Absar Lakdawala
Keyword(s):  
Bubble Dynamics ◽  
Numerical Study

Experimental and numerical study on bubble dynamics and heat transfer during nucleate boiling of FC-72

2019 ◽  
Vol 139 ◽  
pp. 822-831 ◽  
Author(s):  
Zhizhu Cao ◽  
Jie Zhou ◽  
Jinjia Wei ◽  
Dongliang Sun ◽  
Bo Yu
Keyword(s):  
Heat Transfer ◽  
Bubble Dynamics ◽  
Numerical Study ◽  
Nucleate Boiling

Numerical Study of Bubble Growth on a Micro-Finned Surface

2011 ◽  
Author(s):  
Woorim Lee ◽  
Gihun Son
Keyword(s):  
Heat Transfer ◽  
Bubble Growth ◽  
Bubble Dynamics ◽  
Numerical Study ◽  
Removal Rate ◽  
Bubble Formation ◽  
Experimental Studies ◽  
Nucleate Boiling ◽  
Finned Surface ◽  
Fin Spacing

Bubble growth on a micro-finned surface, which can be used in enhancing boiling heat transfer, is numerically investigated by solving the conservation equations of mass, momentum, and energy. The bubble deformation or the liquid-vapor interface is determined by the sharp-interface level-set method, which is modified to include the effect of phase change and to treat the contact angle and the evaporative heat flux from the liquid microlayer on an immersed solid surface of a microfin. The numerical method is applied to clarify bubble growth and heat transfer characteristics on a surface including fin and cavity during nucleate boiling which have not been provided from the previous experimental studies. The effects of single fin, fin-cavity distance, and fin-fin spacing on the bubble dynamics are investigated. The micro-fin is found to affect the activation of cavity. The fin-cavity configuration is found to determine the bubble formation in a cavity. The vapor removal rate is also observed to significantly depend on the fin-fin spacing.

The Influence of Acoustic Cavitation to Microscopic Material Removal in Polishing Process Based on Vibration of Liquid: A Numerical Study

2006 ◽  
Vol 532-533 ◽  
pp. 301-304 ◽  
Author(s):  
Zhong Ning Guo ◽  
Zhi Gang Huang ◽  
Xin Chen
Keyword(s):  
Material Removal ◽  
High Speed ◽  
Bubble Dynamics ◽  
Numerical Study ◽  
Dissipative Particle Dynamics ◽  
Thermal Conditions ◽  
Acoustic Cavitation ◽  
Ultrasonic Frequency ◽  
Polishing Process ◽  
Cavitation Phenomenon

In Polishing Process based on Vibration of Liquid (PVL), abrasive particles driven by polishing liquid will brush and etch workpiece to achieve material removal. Because the liquid is vibrated in ultrasonic frequency, polishing process will be greatly affected by cavitation phenomenon. The critical thermal conditions and high-speed liquid jet produced by bubble dynamics may damage workpiece. A refined Dissipative Particle Dynamics method is applied to study the effect of acoustic cavitation on PVL. Validity of the numerical simulation is tested according to experimental results.

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.

Numerical Study of the Effect of Propellers Skew on Cavitation Performance

2013 ◽  
Vol 705 ◽  
pp. 405-409
Author(s):  
Zhi Feng Zhu
Keyword(s):  
Bubble Dynamics ◽  
Volume Fraction ◽  
Numerical Study ◽  
Tip Vortex ◽  
Hydrodynamic Performance ◽  
Navier Stokes ◽  
Skew Angle ◽  
Cavitation Performance ◽  
Numerical Predictions ◽  
Hybrid Grid

The effect of propeller skew on cavitation distribution, thrust and the torque is studied numerically. With the hybrid grid strategy and the sliding mesh, the Unsteady Navier-Stokes (N-S) and the Bubble Dynamics equations were solved to predict the vapor volume fraction around ships propellers blades. The numerical predictions of the sheet and the tip vortex cavitation of the propeller E779A are in agreement with the results in other literature in general. For propeller models DTMB, the proper increase of the propeller skew angle may enhance the hydrodynamic performance.

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