BEGIN:VCALENDAR VERSION:2.0 PRODID:-//wp-events-plugin.com//6.6.4.4//EN TZID:Asia/Jerusalem X-WR-TIMEZONE:Asia/Jerusalem BEGIN:VEVENT UID:0-1630@aerospace.technion.ac.il DTSTART;TZID=Asia/Jerusalem:20260126T133000 DTEND;TZID=Asia/Jerusalem:20260126T143000 DTSTAMP:20251231T105927Z URL:https://aerospace.technion.ac.il/events/experimental-characterization- and-modeling-of-cavitation-in-radial-flow-between-two-overlying-plates-wit h-varying-gaps/ SUMMARY:Experimental characterization and modeling of cavitation in radial flow between two overlying plates with varying gaps DESCRIPTION:Lecturer:Samruddhi Salunke\n Faculty:The Stephen B. Klein Facul ty of Aerospace Engineering\n Institute:Technion – Israel Institute of T echnology\n Location:Classroom 165\, ground floor\, Library\, Aerospace En g.\n Zoom: https://technion.zoom.us/j/93549691766\n Abstract: In the prese nt study\, we focus on characterizing and modelling cavitation physics in radial flow within a thin layer between two stationary plates. This geomet ry is relevant to aviation fuel pumps\, where cavitation often leads to pr emature and unexpected material degradation and failure.  In this geometr y\, the pressurized liquid flowing through a cylindrical feed nozzle is fo rced to turn ninety degrees and then move radially between two flat plates . The transition from axial to purely radial flow near the orifice results in extreme radial dilatation. If nuclei are present\, this will lead to t heir rupture and the formation of cavitation bubbles. These bubbles form a cavitating cloud in the form of a disk surrounding the central inlet feed port\, with a distinct boundary between the bubble cloud and liquid obser ved at the radial location of bubble collapse.\n\nIn our experimental effo rt\, we quantified and compared cavitating disk behaviour for distilled wa ter and dodecane (used as a surrogate for aviation fuel) across various ga ps between the plates\, ranging from 0.025 mm to 0.5 mm\, and inlet-outlet pressure ratios in the range 4--11. By employing high-speed imaging along side high-frequency  and radial pressure measurements\, we captured both the time-averaged and unsteady features of the disk-shaped cavitation clou d\, specifically investigating the location of its abrupt radial collapse and the oscillatory behaviour of the cavity disk perimeter.  In the semin ar\, a detailed discussion on the differences in radial cavitation behavio ur between distilled water and dodecane will be presented.\n\nIn our model ling efforts\, the spatial Rayleigh-Plesset equation was utilized to predi ct the abrupt radial collapse distance of the cavitation disk as a functio n of gap thickness between the plates. Additionally\, we proposed a barotr opic model for radial mean pressure profile prediction\; this model showed good agreement when validated against experimental measurements across di fferent gaps and inlet-outlet pressure ratios.\n\n \;\n\n \;\n\n& nbsp\;\n Details: \n CATEGORIES:Seminars,סמינרים LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng. END:VEVENT BEGIN:VTIMEZONE TZID:Asia/Jerusalem X-LIC-LOCATION:Asia/Jerusalem BEGIN:STANDARD DTSTART:20251026T010000 TZOFFSETFROM:+0300 TZOFFSETTO:+0200 TZNAME:IST END:STANDARD END:VTIMEZONE END:VCALENDAR