Çeşmeci, BurakMartı, Ali İhsan2024-12-112024-12-112023978-605-9678-36-0https://hdl.handle.net/20.500.13091/9760Weirs are important water structures on rivers. Past to present, weirs with sharp-edges and wide-flanges have been studied and applied. In this study, piano key weirs (PKW), the UHFHQW\HDUV¶SRSXODUZHLUVDUHWDNHQLQWR consideration. D-type PKW was chosen for this study. In the first part of the study, information about PKWs was given and PKW structures available on the world today were explained. Then, 4 different PKW models were designed in such a way that the ratio of the width of the inlet key (Wi) to the width of the outlet key (Wo) was (Wi/Wo), PK = 1.25. In these models, the effect of the change in weir width (L) and weir height (P) on the results was observed for the fixed PK value for varying weir heights of Model 1 (P=20 cm) and Model 2 (P=15 cm) and weir widths of Model 2 (L=30 cm), Model 3 (20 cm) and Model 4 (L=40 cm). Experimental and numerical analyses were performed in a rectangular open channel in the laboratory, while the numerical models were analyzed in the ANSYS-Fluent program, a computer program used in computational fluid dynamics (CFD) problems. All the analyses were carried out for different discharge rates. The results obtained from the experimental and numerical studies were compared on the Flow (Q) ± Head Discharge (H) and the Discharge Coefficient (Cd) ± Dimensionless Weir Head (H/P) diagrams. As a result of the study, the increase in weir heights (P) and widths (L) provided higher rates of water transfer to the downstream with lower weir heads.eninfo:eu-repo/semantics/openAccessANSYS-FluentCFDPKWOpen ChannelWeirConference Object