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Information Journal Paper

Title

FLOW PATTERNS AND SHEAR STRESS DISTRIBUTION IN A 90 DEGREE SHARP BEND WITH W-WEIR

Pages

  17-34

Abstract

 By entering flow into a bend, the flow will be affected by two forces of TRANSVERSE pressure and centrifugal in which the helicoidally flow is developed. Such pattern is the main cause of erosion in outer bank and sedimentation in inner bank. Many measures have been developed which can modify the flow pattern and therefore reduce erosion. The W-weirs is among such measures. In the present paper, by measuring three components of flow velocities with and without presence of W-weir, variation of flow patterns and SHEAR STRESS DISTRIBUTION in a 90 degree sharp bend have been investigated. The analyses of data show more uniform flow upstream of the weir and also reveal that the effect of TRANSVERSE and centrifugal forces are modified in such a way that the secondary flow is diminished. The SHEAR STRESS DISTRIBUTION upstream of the weir is more uniform in comparison to the case of no weir. The results show that SHEAR STRESS in outer bank is reduced and in inner bank increased. The results show that for the case of no weir, the SHEAR STRESS for Froude number of 0.17 and 0.40 in 30-degree location are 1.19 and 5.47, respectively. For the case in which a Weir exists, these values are reduced to 1.16 and 4.07, respectively.

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  • Cite

    APA: Copy

    ATASHI, V., SHAFAEI BJSTAN, M., & AHADIYAN, J.. (2012). FLOW PATTERNS AND SHEAR STRESS DISTRIBUTION IN A 90 DEGREE SHARP BEND WITH W-WEIR. RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE", 5(13), 17-34. SID. https://sid.ir/paper/610080/en

    Vancouver: Copy

    ATASHI V., SHAFAEI BJSTAN M., AHADIYAN J.. FLOW PATTERNS AND SHEAR STRESS DISTRIBUTION IN A 90 DEGREE SHARP BEND WITH W-WEIR. RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE"[Internet]. 2012;5(13):17-34. Available from: https://sid.ir/paper/610080/en

    IEEE: Copy

    V. ATASHI, M. SHAFAEI BJSTAN, and J. AHADIYAN, “FLOW PATTERNS AND SHEAR STRESS DISTRIBUTION IN A 90 DEGREE SHARP BEND WITH W-WEIR,” RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE", vol. 5, no. 13, pp. 17–34, 2012, [Online]. Available: https://sid.ir/paper/610080/en

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    مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
    مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
    مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
    مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
    مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
    مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
    مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
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