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UID:0-462@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20161102T163000

DTEND;TZID=Asia/Jerusalem:20161102T173000

DTSTAMP:20230603T191007Z

URL:https://aerospace.technion.ac.il/events/the-swimming-of-a-slender-fish
 /

SUMMARY:The Swimming of a Slender Fish
DESCRIPTION:Lecturer:Ohad Ophir\n Faculty:Department of Aerospace Engineeri
 ng\n Institute:Technion – Israel Institute of Technology\n Location:Clas
 sroom 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: \n Abstract: \
 n Details: \n We study hydrodynamic efficiency of a slender fish furnished
  a with separated caudal fin that swims by flexing its body (say\, left-ri
 ght). Most fish look and swim that way. Hydrodynamic efficiency of this fi
 sh obviously depends on the shape of its body and fins and on the way it f
 lexes\, but it also depends on elastic recoil of its fins (caudal fin in p
 articular) and dynamic recoil of its body.\nUnder most circumstances\, ela
 stic recoil of the caudal fin has no detrimental effect on hydrodynamic ef
 ficiency\; moreover\, in many cases it improves it by placing the fin at a
  more favorable angle of attack. Because the elastic recoil increases with
  increasing thrust\, under the same circumstances the efficiency also incr
 eases with increasing thrust. Indeed some fish prefer moving in short powe
 rful bursts\, rather than swimming at constant speed. We show that\, under
  some circumstances\, body recoil can significantly affect hydrodynamic ef
 ficiency\, leading to cases in which rigid caudal fin is more effective th
 an the flexible one\, and swimming with low thrust is more effective than 
 swimming with high thrust.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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