Cavitation hots up
Article Abstract:
Dynamics of bubble cavitation revealed that during collapse, the gas inside the bubble is compressed at a faster rate such that it cannot equilibrate with the surrounding liquid, leading to energy focusing and an infinite rise in temperature, which leads to the emission of light. An investigation was conducted and it was indicated that the temperature inside these bubbles reached a maximum of 15,000 Kelvin, which is equivalent to the temperature on the surface of a bright star.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2005
User Contributions:
Comment about this article or add new information about this topic:
A simple explanation of light emission in sonoluminescence
Article Abstract:
Intense bursts of light are emitted by ultrasonically driven gas bubbles in liquids. Sonoluminescence mechanism have long been debated. The light emission can be explained by extending the hydrodynamic/chemical picture. Additional elements include a model for the volume dependence of the temperature of the bubble and a small emissivity allowance of a weakly ionized gas. The approach quantitatively accounts for observed parameter dependences of light intensity.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
Creating a dry variety of quicksand
Article Abstract:
The study developed a simple force model to describe the dynamics of the ball in the sand and the parameter dependence of the final depth. Dry quicksands may evolve from the sedimentation of very fine sand after it has been blown into the air and, it is reported that if they evolved large enough it could cause a threat to humans.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2004
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Prey attraction as a possible function of discoid stabilimenta of juvenile orb-spinning spiders. Foraging in agricultural fields: local 'sit-and-move' strategy scales up to risk-averse habitat use in a wolf spider
- Abstracts: Local adaptation but not geographical separation promotes assortative mating in a snail. A process of pair formation leading to assortative mating: passive age-assortative mating by habitat heterogeneity
- Abstracts: A simple rule for the evolution of cooperation on graphs and social networks. Spatial structure often inhibits the evolution of cooperation in the snowdrift game
- Abstracts: Amplitude regulation of vocalizations in noise by a songbird, Taeniopygia guttata. Regulation of vocal amplitude by the blue-throated hummingbird, Lampornis clemenciae
- Abstracts: Island of the clones. The evolution of aggregation in profitable and unprofitable prey. Mimicry on the edge