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Investigation of Flow Past Cylinder ...

Bista, Sabal,

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Investigation of Flow Past Cylinder Placed Near a Bed /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Investigation of Flow Past Cylinder Placed Near a Bed // Sabal Bista.
作者:	Bista, Sabal,
面頁冊數:	1 electronic resource (73 pages)
附註:	Source: Masters Abstracts International, Volume: 86-04.
Contained By:	Masters Abstracts International86-04.
標題:	Fluid mechanics. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31563394
ISBN:	9798384475828

Investigation of Flow Past Cylinder Placed Near a Bed /
Bista, Sabal,

Investigation of Flow Past Cylinder Placed Near a Bed /Sabal Bista. - 1 electronic resource (73 pages)

Source: Masters Abstracts International, Volume: 86-04.

This study investigates the impact of gap ratio and Reynolds number on the wake dynamics of flow past a horizontal cylinder using Particle Image Velocimetry. The gap ratios (ratio of gap size, \uD835\uDC3A to cylinder diameter, \uD835\uDC51 ) examined were 0.50,1.0, and 1.5 at Reynolds number of 3960 and 0.25, 0.50, and 1.0, at Reynolds number of 7930. The findings reveal that a decreasing gap ratio results in an asymmetrical wake due to the stretching of the bottom cylinder shear layer and an increase in recirculation length behind the cylinder due to reduced entrainment. Additionally, the recirculation region length decreases with increasing Reynolds number due to enhanced mixing and momentum transfer. No recirculation zone near the bed was observed for the Reynolds numbers considered. Proper Orthogonal Decomposition (POD) analysis showed reduced energy contribution of the first two modes with decreasing gap ratio, reflecting the breakdown of large coherent structures due to the bed interaction. The reconstructed flow field indicated suppression of vortex shedding from the bottom cylinder shear layer for gap ratios less than 0.50. These results suggest that gap ratio is a more critical parameter than absolute gap size in determining flow structures, with minimal effect from Reynolds number. 

English

ISBN: 9798384475828Subjects--Topical Terms:

528155
Fluid mechanics.
Subjects--Index Terms:

Gap flow

Investigation of Flow Past Cylinder Placed Near a Bed /
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100 1 $a Bista, Sabal, $e author. $3 3830061
245 1 0 $a Investigation of Flow Past Cylinder Placed Near a Bed / $c Sabal Bista.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2024
300 $a 1 electronic resource (73 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
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500 $a Source: Masters Abstracts International, Volume: 86-04.
500 $a Advisors: Nasif, G.; Balachandar, R. Committee members: Shinneeb, M.; Barron, R.
502 $b M.A.Sc. $c University of Windsor (Canada) $d 2024.
520 $a This study investigates the impact of gap ratio and Reynolds number on the wake dynamics of flow past a horizontal cylinder using Particle Image Velocimetry. The gap ratios (ratio of gap size, \uD835\uDC3A to cylinder diameter, \uD835\uDC51 ) examined were 0.50,1.0, and 1.5 at Reynolds number of 3960 and 0.25, 0.50, and 1.0, at Reynolds number of 7930. The findings reveal that a decreasing gap ratio results in an asymmetrical wake due to the stretching of the bottom cylinder shear layer and an increase in recirculation length behind the cylinder due to reduced entrainment. Additionally, the recirculation region length decreases with increasing Reynolds number due to enhanced mixing and momentum transfer. No recirculation zone near the bed was observed for the Reynolds numbers considered. Proper Orthogonal Decomposition (POD) analysis showed reduced energy contribution of the first two modes with decreasing gap ratio, reflecting the breakdown of large coherent structures due to the bed interaction. The reconstructed flow field indicated suppression of vortex shedding from the bottom cylinder shear layer for gap ratios less than 0.50. These results suggest that gap ratio is a more critical parameter than absolute gap size in determining flow structures, with minimal effect from Reynolds number. 
546 $a English
590 $a School code: 0115
650 4 $a Fluid mechanics. $3 528155
650 4 $a Engineering. $3 586835
650 4 $a Materials science. $3 543314
650 4 $a Mechanical engineering. $3 649730
653 $a Gap flow
653 $a Particle Image Velocimetry
653 $a Reynolds number
653 $a Cylinder shear layer
690 $a 0204
690 $a 0794
690 $a 0537
690 $a 0548
710 2 $a University of Windsor (Canada). $b MECHANICAL ENGINEERING. $e degree granting institution. $3 3819042
720 1 $a Nasif, G. $e degree supervisor.
720 1 $a Balachandar, R. $e degree supervisor.
773 0 $t Masters Abstracts International $g 86-04.
790 $a 0115
791 $a M.A.Sc.
792 $a 2024
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31563394