The dangers of cavitation in pulmonary tuberculosis are well recognized and several different mechanical procedures have been devised for the collapse of these cavities. It is, likewise, well established that no one method of collapse is ideal for all cases and the method chosen in any instance will depend upon many factors, among which are the location and extent of the pathology. In general, ...

Abstract Cavitation generation methods have been used in multifarious directions because of their diversity, and numerous studies discussions conducted on cavitation methods. This study aims to explore the generating mechanism evolution law volume alternate (VAC). In VAC, liquid water is placed an airtight container with a variable volume. As alternately changes, inside continues cavitate. Then...

Wall reinforcement in xylem conduits is thought to prevent wall implosion by negative pressures, but direct observations of xylem geometry during water stress are still largely lacking. In this study, we have analyzed the changes in xylem geometry during water stress in needles of four pine species (Pinus spp.). Dehydrated needles were frozen with liquid nitrogen, and xylem cross sections were ...

Recent studies indicate that the transition from sheet to cloud cavitation depends on both cavitation number and Reynolds number. In the present paper this transition is investigated analytically and a physical model is introduced. In order to include the entire process, the model consists of two parts, a model for the growth of the sheet cavity and a viscous film flow model for the so-called r...