Discussion of ENERGY DISSIPATION AND TURBULENCE PRODUCTION IN WEAK HYDRAULIC JUMPS by E. Mignot and R. Cienfuegos

ROMAGNOLI, M.; GARCIA, C. M.; LOPARDO, R. A.

JOURNAL OF HYDRAULIC ENGINEERING

ASCE-AMER SOC CIVIL ENGINEERS

Año: 2011 vol. 138 p. 857 - 860

0733-9429

The authors reported experimental results on the spatial evolution of turbulent kinetic energy and turbulence production in free weak hydraulic jumps. They performed turbulence measurements using two different 16 MHz SonTek/YSI microacoustic Doppler velocimeters (ADVs) on hydraulic jumps for inflow Froude numbers (F1) of 1.3, 1.9, and 2 [F1=U1/(z1g)^0.5, where U 1 = inflow mean velocity; z1 = supercritical depth; and g = gravitational acceleration]. Herein the discussers aim to complement the authors? analysis by using a new independent data set and by arguing both the bias on the estimated values of turbulent kinetic energy because of the effects of the ADV sampling strategy and the uncertainty on the experimental determination of the turbulence production term.