The dynamics of vapor bubble growth in boiling owing to excess enthalpy of surrounding superheated liquid

2008 ◽  
Vol 46 (6) ◽  
pp. 861-866 ◽  
Author(s):  
B. M. Dorofeev ◽  
V. I. Volkova
Keyword(s):  
Vapor Bubble ◽  
Bubble Growth ◽  
Excess Enthalpy ◽  
Superheated Liquid

Inertial-thermal governed vapor bubble growth in highly superheated liquid

2005 ◽  
Vol 41 (10) ◽  
pp. 855-863 ◽  
Author(s):  
Alexandr A. Avdeev ◽  
Yuri B. Zudin
Keyword(s):  
Vapor Bubble ◽  
Bubble Growth ◽  
Superheated Liquid

scholarly journals New semi-analytical solution of the problem of vapor bubble growth in superheated liquid

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
A. A. Chernov ◽  
A. A. Pil’nik ◽  
I. V. Vladyko ◽  
S. I. Lezhnin
Keyword(s):  
Analytical Solution ◽  
Vapor Bubble ◽  
Bubble Growth ◽  
Moving Boundary ◽  
Initial Boundary ◽  
Initial Boundary Value Problem ◽  
Superheated Liquid ◽  
Conductivity Equation ◽  
Wide Range ◽  
Liquid Evaporation

Abstract This paper presents a mathematical model of the vapor bubble growth in an initially uniformly superheated liquid. This model takes into account simultaneously the dynamic and thermal effects and includes the well-known classical equations: the Rayleigh equation and the heat conductivity equation, written with consideration of specifics associated with the process of liquid evaporation. We have obtained a semi-analytical solution to the problem, which consists in reducing the initial boundary value problem with a moving boundary to a system of ordinary differential equations of the first order, valid in a wide range of operating parameters of the process at all its stages: from inertial to thermal, including the transitional one. It is shown that at large times this solution is consistent with the known solutions of other authors obtained in the framework of the energy thermal model, in particular, for the high Jacob numbers, it is consistent with the Plesset–Zwick solution.

Analytical Description of Vapor Bubble Growth in a Superheated Liquid: A New Approach

2020 ◽  
Vol 65 (11) ◽  
pp. 405-408
Author(s):  
A. A. Chernov ◽  
M. A. Guzev ◽  
A. A. Pil’nik ◽  
I. V. Vladyko ◽  
V. M. Chudnovsky
Keyword(s):  
Vapor Bubble ◽  
Bubble Growth ◽  
Analytical Description ◽  
Superheated Liquid ◽  
New Approach

Numerical Simulation of Growth of a Vapor Bubble During Flow Boiling of Water in a Microchannel

2004 ◽  
Author(s):  
Abhijit Mukherjee ◽  
Satish G. Kandlikar
Keyword(s):  
Growth Rate ◽  
Vapor Bubble ◽  
Bubble Growth ◽  
Stokes Equations ◽  
Flow Boiling ◽  
Thin Liquid Film ◽  
Navier Stokes ◽  
Superheated Liquid ◽  
Navier Stokes Equations ◽  
Energy Equations

The present study is performed to numerically analyze growth of a vapor bubble during flow of water in a microchannel. The complete Navier-Stokes equations along with continuity and energy equations are solved using the SIMPLER method. The liquid vapor interface is captured using the level set technique. The microchannel is 200 microns in square cross-section and the bubble is placed at the center of the channel with superheated liquid around it. The results show steady initial bubble growth followed by a rapid axial expansion after the bubble fills the channel with a thin liquid film around it. The bubble then rapidly turns into a plug and fills up the entire channel. A trapped liquid layer is observed between the bubble and the channel as the plug elongates. The bubble growth rate increased with the incoming liquid superheat and formation of vapor patch at the walls is found to be dependent on the bubble growth rate. The upstream interface of the bubble is found to exhibit both forward and reverse movement during bubble growth. Results show little effect of gravity on the bubble growth under the specified conditions. The bubble growth features obtained from numerical results are found to be qualitatively similar to experimental observations.

Effect of Pressure on Bubble Growth Within Liquid Droplets at the Superheat Limit

1982 ◽  
Vol 104 (4) ◽  
pp. 750-757 ◽  
Author(s):  
C. T. Avedisian
Keyword(s):  
Vapor Bubble ◽  
Bubble Growth ◽  
High Speed ◽  
Ambient Pressure ◽  
Organic Liquid ◽  
Liquid Droplets ◽  
Growth Data ◽  
Two Phase ◽  
Photographic Evidence ◽  
Good Agreement

A study of high-pressure bubble growth within liquid droplets heated to their limits of superheat is reported. Droplets of an organic liquid (n-octane) were heated in an immiscible nonvolatile field liquid (glycerine) until they began to boil. High-speed cine photography was used for recording the qualitative aspects of boiling intensity and for obtaining some basic bubble growth data which have not been previously reported. The intensity of droplet boiling was found to be strongly dependent on ambient pressure. At atmospheric pressure the droplets boiled in a comparatively violent manner. At higher pressures photographic evidence revealed a two-phase droplet configuration consisting of an expanding vapor bubble beneath which was suspended a pool of the vaporizing liquid. A qualitative theory for growth of the two-phase droplet was based on assuming that heat for vaporizing the volatile liquid was transferred across a thin thermal boundary layer surrounding the vapor bubble. Measured droplet radii were found to be in relatively good agreement with predicted radii.

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