Experimental investigation of discharge coefficient over novel kind of sharp-crested V-notch weir

Saadatnejadgharahassanlou H., Gharehbaghi A., Mehdizadeh S., KAYA B., Behmanesh J.

FLOW MEASUREMENT AND INSTRUMENTATION, vol.54, pp.236-242, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 54
  • Publication Date: 2017
  • Doi Number: 10.1016/j.flowmeasinst.2017.02.008
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.236-242
  • Keywords: Flow measurement, Novel weir, Discharge coefficient, Open channel flow, Experimental mdel, Aerated flow, LABYRINTH WEIRS, FLOW, SIMULATION
  • Dokuz Eylül University Affiliated: Yes


Thin-plate weirs are the simplest and least expensive devices, which frequently have been employed in many water projects. In this research, a unique type of Sharp-Crested V-notch weir, entitled SCVW, has been introduced. The hydraulic characteristics of the present weir were investigated theoretically and experimentally under free aerated and non-aerated flow conditions in an open channel for large physical models. To investigate the variations of the discharge coefficient of SCVW versus weir height and vertex angle, a comprehensive laboratory experiments were conducted by measuring the discharge and the water head over the crest of weir. Possibility of different formulations for the head-discharge relationship of SCVW was examined and suitable analytical equation was proposed. The computed discharge using the suggested equation was within 0-10% of the observed ones. According to the experimental observations, the SCVW showed better performance in comparison with normal wire.