International Science Community Association Research Journal of Engineering Sciences 2278 - 9472 1 4 2012 October 26 Discharge Characteristics of Sharp Crested Weir of Curved Plan-form 16 20 EN KaruppaR. RajThundil 1 School of Mechanical and Building Sciences, VIT University, Vellore-632014, INDIA Pavan P. 2 Reddy RajeevD. 3 Chattopadhyay D.P. 1 Department of Textile Chemistry, Faculty of Technology and Engineering, The M.S.University of Baroda, Vadodara-390001, INDIA Inamdar M.S. 2 Faculty of Textile Processing, Sarvajanik College of Engineering and Technology, Surat-395001, INDIA Kumar S. 1 Ahmad Z. 2 T. Mansoor 3 Himanshu S.K. 4 > Research Paper 2012 9 26 2012 October 26 Weirs have been widely used for the purpose of flow measurement and flow control in open channels. Generally they are used as normal weirs. For the purpose of flow diversion they can also be used as side weirs or skew weirs. Various weirs of modified plan form have been suggested in the past to enhance their discharging capacity with minimum head over the weirs and to restrict the afflux. Presented in this paper are results of experimental study carried out to investigate the discharging capacity of a sharp-crested curved plan-form weirs under free flow conditions in a rectangular channel with weir height 0.18 m and vertex angles ranging from 45 to 120The equations for the discharge coefficient of curved weirs have been proposed. The results show that there is a gain of about 40% in discharge over a curved weir with vertex angle of 90 as compared to a normal weir. Finally, equations for discharge coefficient for all tested curved weirs in a free flow situation have been proposed. Copyright@ International Science Community Association