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Paper Information

Journal:   PLANT PROTECTION (SCIENTIFIC JOURNAL OF AGRICULTURE)   FALL 2016 , Volume 39 , Number 3 ; Page(s) 209 To 215.
 
Paper: 

STUDY OF MAXIMUM RELATIVE AMPLITUDE FORMATION DUE TO VORTEX SHEDDING OF SUBMERGED OBSTACLES

 
 
Author(s):  MOSTAFAVI S.*, GHOMESHI M., SHAHMORADI B.
 
* FACULTY OF WATER SCIENCES ENGINEERING, SHAHID CHAMRAN UNIVERSITY OF AHVAZ, IRAN
 
Abstract: 

In open channels, when water flows through obstacles, boundary layer on upstream and the separation of streamlines on downstream of the obstacles and therefore vortex shedding will occur. The overlap of vortex wave reflecting from the walls of channels may produce surface waves which are perpendicular to the direction of the flow. When the vortex frequency of obstacles and flow natural frequency become equal, resonance will occur. The purpose of current study was to determine the relative amplitude of transverse waves in submerged flow while resonance occurs. The submerge processing started from 0% into max percent while the waves are visible. This research included 71 tests in different prism obstacles with two style of water strike toward edge and face of the obstacles and in two different inline and staggered arrangements in two modes of transverse waves. The obstacle distances were 120 millimeters from each other. The maximum relative amplitude of the flow depth was 0.2 for mode one and 0.14 for the second modes of transverse wave. By using software and statistical analysis, a formula was suggested for determining the maximum relative amplitude of the flow depth. Finally, the data determined by suggested formula were compared with the laboratory data.

 
Keyword(s): MAXIMUM RELATIVE AMPLITUDE, SUBMERGED OBSTACLES, VORTEX, TRANSVERSE WAVES
 
 
References: 
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Citations: 
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+ Click to Cite.
APA: Copy

MOSTAFAVI, S., & GHOMESHI, M., & SHAHMORADI, B. (2016). STUDY OF MAXIMUM RELATIVE AMPLITUDE FORMATION DUE TO VORTEX SHEDDING OF SUBMERGED OBSTACLES. PLANT PROTECTION (SCIENTIFIC JOURNAL OF AGRICULTURE), 39(3 ), 209-215. https://www.sid.ir/en/journal/ViewPaper.aspx?id=571968



Vancouver: Copy

MOSTAFAVI S., GHOMESHI M., SHAHMORADI B.. STUDY OF MAXIMUM RELATIVE AMPLITUDE FORMATION DUE TO VORTEX SHEDDING OF SUBMERGED OBSTACLES. PLANT PROTECTION (SCIENTIFIC JOURNAL OF AGRICULTURE). 2016 [cited 2021July31];39(3 ):209-215. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=571968



IEEE: Copy

MOSTAFAVI, S., GHOMESHI, M., SHAHMORADI, B., 2016. STUDY OF MAXIMUM RELATIVE AMPLITUDE FORMATION DUE TO VORTEX SHEDDING OF SUBMERGED OBSTACLES. PLANT PROTECTION (SCIENTIFIC JOURNAL OF AGRICULTURE), [online] 39(3 ), pp.209-215. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=571968.



 
 
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