Reinhard Geisler

  • Citations Per Year
Learn More
Basic facts on the dynamics of bubbles in water are presented. Measurements on the free and forced radial oscillations of single spherical bubbles and their acoustic (shock waves) and optic (luminescence) emissions are given in photographic series and diagrams. Bubble cloud patterns and their dynamics and light emission in standing acoustic fields are(More)
Particle image velocimetry has been the preferred experimental technique with which to study the aerodynamics of animal flight for over a decade. In that time, hardware has become more accessible and the software has progressed from the acquisition of planes through the flow field to the reconstruction of small volumetric measurements. Until now, it has not(More)
Cavitation bubbles are generated in water by low-energy femtosecond laser pulses in the presence of an ultrasonic field. Bubble dynamics and cavitation luminescence are investigated by CCD photography and photomultiplier measurements in dependence on the phase of the acoustic cycle at which the bubbles are generated. The experimental results demonstrate(More)
The nucleation of ice by power ultrasound at elevated temperatures (compared to control experiments) has been well documented for the past four decades, however there is a limited understanding of the influence, if any of cavitation bubbles. This work reports high-speed observations of the crystallisation of ice in the presence of acoustic cavitation. The(More)
The ecological and physiological effects of extreme limnochemical conditions, prevalent in many of the Amazonian waters, on the very rich fish fauna of that river system are analyzed. Strong morphological differentiation, especially in the dentition of charaeoid fishes, may be related to their nutritional biology and hence to the corresponding limnological(More)
The fielcl of sonoluminescence: the making of light from sound, and the related firld of cavitation bubble luminescence are briefly reviewed. Experimental prospects for the investigate ion of light emission from bubbles are discussed. These include the study of luminescence of a. few trapped, interacting bubbles and cavitation bubble luminescence from(More)
  • 1