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UID:0-497@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20160201T163000

DTEND;TZID=Asia/Jerusalem:20160201T173000

DTSTAMP:20230603T192212Z

URL:https://aerospace.technion.ac.il/events/laminar-backward-facing-step-f
 low-with-wavy-surface/

SUMMARY:Laminar Backward Facing Step Flow with Wavy Surface
DESCRIPTION:Lecturer:Hilla Tor\n Faculty:Department of Aerospace Engineerin
 g\n Institute:Technion – Israel Institute of Technology\n Location:Class
 room 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: \n Abstract: \n
  Details: \n Flow separation and reattachment are widespread in engineerin
 g in general\, and in aeronautics in particular. One of the issues that co
 ncern the researchers over the years is the possibility to control the flo
 w separation zone and the reattachment point location. In the second half 
 of the 20th century\, the possibility of replacing rigid walls with wavy s
 urfaces was examined. Results of previous studies indicate that adding a w
 avy surface can delay the transition of the flow from laminar to turbulent
 .\nThe flow over a backward facing step is a fundamental model of flow sep
 aration. In this study\, the flow over a backward facing step with a wavy 
 surface was examined. The effect of the frequency and amplitude of the wav
 y surface on the drag force\, the flow stability for small disturbances an
 d on the location of the reattachment point were studied numerically. The 
 results show that the viscus drag force is increased. The location of the 
 reattachment point and the stability of the flow are also influenced by th
 e choice of the surface parameters. It was found that the wavy surface amp
 litude and frequency that improve the flow stability also increase the dra
 g force.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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