Closure to “On analytical formulae for navigation lock filling-emptying and overtravel” by LAURENT SCHINDFESSEL, TOM DE MULDER, STEPHAN CREELLE and GERALD A. SCHOHL, J. Hydraulic Res. 53(1), 2015, 134–148

Abstract

In the original paper, approximate explicit formulae were proposed for the following dimensionless quantities: the filling time , the amplitude and time of the first overtravel peak, as well as the frequency of the chamber surface oscillations around the equalization level. For several reasons, the Authors only discussed the first overtravel peak: (i) conciseness; (ii) the increasing difficulty of experimentally validating gradually smaller water surface deviations of subsequent extremes; and (iii) the changing oscillation period during the overtravel due to the nonlinear damping. Therefore, the frequency was defined in Eq. (13) to be only representative for the first overtravel peak.