عنوان EXPERIMENTAL INVESTIGATION OF HYDRAULIC JUMP CHARACTERISTICS IN CONTRACTIONS AND EXPANSIONS عنوان مجله Sigma Journal Engineering and Natural Sciences نوع پژوهش مقاله چاپ شده کلیدواژهها Contraction, expansion, hydraulic jump, instantaneous velocity, reynolds stresses چکیده Hydraulic jump is one of the most important phenomena in a rapid changing flow. It occurs when flow change from supercritical into subcritical and there is an increase in the depth over a small distance. In the present study, the characteristics of hydraulic jumps in contractions and expansions with curved walls were investigated for five Froude numbers in the range 5.8 پژوهشگران رسولدانشفراز (نفر اول)، حجتصادقی (نفر دوم)، علیرضازاده جودی (نفر سوم)، جانآبراهام (نفر چهارم)