International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2575

Full Length Research Paper

Particle model of single bubble sonoluminescence

M. Adama Maiga
  • M. Adama Maiga
  • LML Laboratory (Laboratoire de Mécanique de Lille) / Arts et Metiers ParisTech, 8 Boulevard Louis XIV, 59046 Lille, France.
  • Google Scholar


  •  Received: 14 July 2016
  •  Accepted: 27 September 2016
  •  Published: 16 October 2016

Abstract

The single bubble sonoluminescence is a phenomenon where the vapour or gas bubble trapped in a liquid collapse by emitting light. Sonoluminescence is most often characterized by the formation of an imploding shock and the plasma. However, studies show that in some cases neither an imploding shock nor a plasma has been observed. This study concerns a physical explanation of the Single Bubble Sonoluminescence (SBSL), where neither an imploding shock nor a plasma has been observed. A particles model of SBSL is proposed based on the dissociation hypothesis phenomenon and the experimental studies showed that particles can be trapped in bubble and to emit light during the evolution of a single bubble. During the bubble collapse phase, the bubble radius can reach a few nanometers. The bubble is considered a quantum dot, where the particles from the molecules dissociation, are trapped and confined in the bubble. This containment imposes on particles a strong excitement which allows them to gain a strong energy and to be in an excited state. Thus, at the moment of the bubble afterbounce, the particles de-excite by losing energy in the form of photon emission, which explains the light emission. The model shows that the energy of the particles is physically acceptable only if the bubble is spherical. The sphericity of the bubble, which is a necessary condition for the particles model of SBSL, is experimentally observed in the collapse phase (to the first afterbounce) but not in the afterbounces phase, where the bubble is unstable and not spherical. This explains why the bubble emits light to the collapse but not in the afterbounces phase where it is also very small. This condition of spherical bubble can constitute a validation of the particles model of SBSL. In this model, with the interaction between particles, it is also possible that the particles emit light by Bremsstrahlung radiation emission. But contrary to case where the temperature is very high, that is, where there is the formation of the plasma, in this case those are the size and sphericity of the bubble, that is, the containment, which impose on particles a strong excitement which allow them to move.
 
Key words: Sonoluminescence, modeling, particles, quantum mechanics.