منابع مشابه
On the onset of transient cavitation in gassy liquids
This paper deals with a numerical and experimental study of ultrasound induced cavitation. On the basis of a computational analysis of Gilmore’s equation for the individual bubble dynamics, a slight decrease in the pressure radiated by a single bubble immediately before reaching the transient cavitation regime is predicted. Experiments presented in this paper confirm this observation. Therefore...
متن کاملRecent Observations on Cavitation and Cavitation Noise
This paper is primarily concerned with the acoustics of traveling bubble cavitation around foils or headforms. We begin with observations of individual bubbles and the acoustic signals they emit, our purpose being to identify areas of research which would enhance our tlriderstaridirig of the history of individual bubbles. Then we present some riumerical integrations of the Rayleigh/Plesset equa...
متن کاملsurvey on the rule of the due & hindering relying on the sheikh ansaris ideas
قاعده مقتضی و مانع در متون فقهی کم و بیش مستند احکام قرار گرفته و مورد مناقشه فقهاء و اصولیین می باشد و مشهور معتقند مقتضی و مانع، قاعده نیست بلکه یکی از مسائل ذیل استصحاب است لذا نگارنده بر آن شد تا پیرامون این قاعده پژوهش جامعی انجام دهد. به عقیده ما مقتضی دارای حیثیت مستقلی است و هر گاه می گوییم مقتضی احراز شد یعنی با ماهیت مستقل خودش محرز گشته و قطعا اقتضاء خود را خواهد داشت مانند نکاح که ...
15 صفحه اولEffect of non-ionic surfactants on transient cavitation in a megasonic field.
High resolution chronoamperometry has been used to characterize the effect of two non-ionic surfactants, Triton® X-100 and NCW®-1002, on cavitation in aqueous solutions exposed to ~1 MHz sound field. Specifically, using ferricyanide as the electroactive species, temporal variation of current during its reduction on a 25 μm Pt microelectrode has been measured and is used to elucidate transient c...
متن کاملCavitation on surfaces
Entrapment of gas bubbles at the liquid/solid interface plays a crucial role for fluidic systems when the volume to surface ratio goes down. Here, we report an investigation on the presence of air on hydrophobic surfaces in water. The gas pockets on such walls are expanded, and thus made visible, by lowering the liquid pressure, a phenomenon known as heterogeneous cavitation. The investigation ...
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ژورنال
عنوان ژورنال: Journal of the Society of Naval Architects of Japan
سال: 1971
ISSN: 1884-2070,0514-8499
DOI: 10.2534/jjasnaoe1968.1971.130_51