نتایج جستجو برای: bubble growth

تعداد نتایج: 833950  

2004
Jonathan McCarthy W. Peach

The rapid increase in home prices over the past several years has raised concerns about the existence of a speculative bubble in this asset market. A closely related concern—irrespective of any existing bubble—is whether home prices are susceptible to a steep decline that could have a severe impact on the broader economy. Indeed, home prices have been rising rapidly. Since 1995, real home price...

Journal: :The Journal of the Acoustical Society of America 2008
Jonathan B Freund

Estimates are made of the effect of tissue confinement on the response of small bubbles subjected to lithotriptor shock pressures. To do this the Rayleigh-Plesset equation, which governs the dynamics of spherical bubbles, is generalized to treat a bubble in a liquid region (blood), which is in turn encased within an elastic membrane (like a vessel's basement membrane), beyond which a Voigt visc...

Journal: :Physical review letters 2006
R Betti J Sanz

The highly nonlinear evolution of the single-mode Rayleigh-Taylor instability (RTI) at the ablation front of an accelerated target is investigated in the parameter range typical of inertial confinement fusion implosions. A new phase of the nonlinear bubble evolution is discovered. After the linear growth phase and a short constant-velocity phase, it is found that the bubble is accelerated to ve...

2016
An Zou Ashish Chanana Amit Agrawal Peter C. Wayner Shalabh C. Maroo

Boiling, a dynamic and multiscale process, has been studied for several decades; however, a comprehensive understanding of the process is still lacking. The bubble ebullition cycle, which occurs over millisecond time-span, makes it extremely challenging to study near-surface interfacial characteristics of a single bubble. Here, we create a steady-state vapor bubble that can remain stable for ho...

2010
D. Fuster S. Zaleski

This paper unveils the basic mechanisms underlying rectified diffusion processes. The exact solution of the radial transport of species in both phases, gas and liquid, turns to be crucial to accurately predict the growthrate in the context of lithotripsy. The Direct Numerical Simulation of the temporal evolution of an spherical bubble is used to gain new insight on the effect of two phenomena: ...

2013
H. M. Gonnermann B. F. Houghton

[1] We have modeled the nucleation and isothermal growth of bubbles in dacite from the 1912 Plinian eruption of Novarupta, Alaska. Bubble growth calculations account for the exsolution of H2O and CO2, beginning with bubble nucleation and ending when bubble sizes reproduced the observed size distribution of vesicles in Novarupta pumice clasts. Assuming classical nucleation theory, bubbles nuclea...

2008
C. T. Avedisian

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 hav...

2007
Chul H. Lee

Cosmological phase transitions may have played important roles in shaping the present Universe. If the transition is of the rst order, it proceeds with the nucleation of new-phase bubbles and their growth. The details of the bubble dynamics can aaect the consequencies of the phase transition. For example, baryogenesis in the course of the electroweak phase transition is known to depend on the b...

Journal: :Annals of the New York Academy of Sciences 2002
D Qiu G Son V K Dhir D Chao K Logsdon

Experimental studies and numerical simulation of growth and lift-off processes of single bubbles formed on designed nucleation sites have been conducted under low-gravity conditions. Merging of multiple bubbles and lift-off processes during boiling of water in the parabola flights of KC-135 aircraft were also experimentally studied. The heating area of the flat heater surface was discretized an...

Journal: :The Journal of General Physiology 1945
Morgan Harris W. E. Berg D. M. Whitaker V. C. Twitty L. R. Blinks

1. Rats killed in a variety of ways (broken neck, nembutal, anoxia, electrocution) may undergo extensive bubble formation when subsequently decompressed from atmospheric pressure to simulated altitudes of 50,000 feet. On autopsy at sea level, large numbers of bubbles are found throughout the vascular system in the majority of animals. These bubbles appear to originate in small vessels deep with...

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