Two-dimensional Rayleigh model of vapor bubble evolution

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The understanding of vapor bubble generation in an aqueous tissue near a fiber tip has required advanced two dimensional (2D) hydrodynamic simulations. For 1D spherical bubble expansion a simplified and useful Rayleigh-type model can be applied. For 2D bubble evolution, such a model does not exist. The present work proposes a Rayleigh-type model for 2D bubble expansion that is faster and simpler than the 2D hydrodynamic simulations. The model is based on a flow potential representation of the hydrodynamic motion controlled by a Laplace equation and a moving boundary condition. We show that the 1D Rayleigh equation is a specific ... continued below

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Amendt, P; Friedman, M; Glinsky, M; Gurewitz, E; London, R A & Strauss, M January 14, 1999.

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The understanding of vapor bubble generation in an aqueous tissue near a fiber tip has required advanced two dimensional (2D) hydrodynamic simulations. For 1D spherical bubble expansion a simplified and useful Rayleigh-type model can be applied. For 2D bubble evolution, such a model does not exist. The present work proposes a Rayleigh-type model for 2D bubble expansion that is faster and simpler than the 2D hydrodynamic simulations. The model is based on a flow potential representation of the hydrodynamic motion controlled by a Laplace equation and a moving boundary condition. We show that the 1D Rayleigh equation is a specific case of our model. The Laplace equation is solved for each time step by a finite element solver using a triangulation of the outside bubble region by a fast unstructured mesh generator. Two problems of vapor bubbles generated by short-pulse lasers near a fiber tip-are considered: (a) the outside region has no boundaries except the fiber, (b) the fiber and the bubble are confined in a long channel, which simulates a fiber in a vessel wall. Our simulations for problems of type (a) include features of bubble evolution as seen in experiments, including a collapse away from the fiber tip. A different behavior was obtained for problems of type (b) when the channel boundary is close to the fiber. In this case the bubble� s expansion and collapse are both extremely slow in the direction normal to this boundary and distortion of the bubble is observed.

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  • Society of Photo-Optical Instrumentation Engineers Photonics West, San Jose, CA January 23-29, 1999

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  • Other: DE00005796
  • Report No.: UCRL-JC-132924
  • Grant Number: W-7405-Eng-48
  • Office of Scientific & Technical Information Report Number: 5796
  • Archival Resource Key: ark:/67531/metadc697723

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 14, 1999

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  • Aug. 14, 2015, 8:43 a.m.

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  • May 6, 2016, 11:09 p.m.

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Amendt, P; Friedman, M; Glinsky, M; Gurewitz, E; London, R A & Strauss, M. Two-dimensional Rayleigh model of vapor bubble evolution, article, January 14, 1999; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc697723/: accessed November 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.