Effect of Froude Number on flow pattern and scour around T-shaped spur dikes under submerged and unsubmerged condition

In this research parameters influencing flow pattern and scour around submerged and nonsubmerged series of spur dikes in straight channel were investigated. Scour pattern was investigated for three angles of dikes construction، and three submergence ratio. The result showed that with increasing Froude number and decreaseing submergence ratio، scour decreases. Also because of first spur dike effect on main flow، maximum scour depth in second and third spur dike is less than first one. The location of scour and ridge height change with Froude number، submergence ratio and angle. The three dimention velocity around spur dike were analyzed Then we used flow pattern to forecast scour pattern. In this research parameters influencing flow pattern and scour around submerged and nonsubmerged series of spur dikes in straight channel were investigated. Scour pattern was investigated for three angles of dikes construction، and three submergence ratio. The result showed that with increasing Froude number and decreaseing submergence ratio، scour decreases. Also because of first spur dike effect on main flow، maximum scour depth in second and third spur dike is less than first one. The location of scour and ridge height change with Froude number، submergence ratio and angle. The three dimention velocity around spur dike were analyzed Then we used flow pattern to forecast scour pattern. In this research parameters influencing flow pattern and scour around submerged and nonsubmerged series of spur dikes in straight channel were investigated. Scour pattern was investigated for three angles of dikes construction، and three submergence ratio. The result showed that with increasing Froude number and decreaseing submergence ratio، scour decreases. Also because of first spur dike effect on main flow، maximum scour depth in second and third spur dike is less than first one. The location of scour and ridge height change with Froude number، submergence ratio and angle. The three dimention velocity around spur dike were analyzed Then we used flow pattern to forecast scour pattern. In this research parameters influencing flow pattern and scour around submerged and nonsubmerged series of spur dikes in straight channel were investigated. Scour pattern was investigated for three angles of dikes construction، and three submergence ratio. The result showed that with increasing Froude number and decreaseing submergence ratio، scour decreases. Also because of first spur dike effect on main flow، maximum scour depth in second and third spur dike is less than first one. The location of scour and ridge height change with Froude number، submergence ratio and angle. The three dimention velocity around spur dike were analyzed Then we used flow pattern to forecast scour pattern. In this research parameters influencing flow pattern and scour around submerged and nonsubmerged series of spur dikes in straight channel were investigated. Scour pattern was investigated for three angles of dikes construction، and three submergence ratio.