Journal of Hydroinformatics | 2019
Calibration of a dynamic Eulerian-lagrangian model for the computation of wood cylinders transport in shallow water flow
Abstract
A computational Eulerian–Lagrangian model (ORSA2D_WT) is used for modelling the movement of floating rigid bodies on the water surface. The two-dimensional transport is computed with a dynamic approach, modifying existing formulations for the transport of bodies within fluid flows for the case of floating bodies, by adopting suitable added mass, drag and side coefficients. An original formulation for planar rotation is proposed, which includes the effect of the hydrodynamic torque and a resistance term, named added inertia, based on the difference between the angular velocity of the flow and that of the body. The value of the added inertia coefficient is calibrated against experiments made on purpose, involving the transport of a cylinder in a flume with two side obstacles. The calibrated code is applied to a slightly larger set of experiments for its preliminary evaluation. The outcome of the simulations shows that the streamwise and transversal displacements are well modelled, while some inaccuracies arise when considering the cylinder orientation. The effects of the initial conditions on the cylinders’ trajectory and rotation are discussed, showing their influence on the evolution of the rotation angles. doi: 10.2166/hydro.2018.085 om https://iwaponline.com/jh/article-pdf/21/1/164/517732/jh0210164.pdf er 2019 Elisabetta Persi (corresponding author) Gabriella Petaccia Stefano Sibilla Department of Civil Engineering and Architecture, University of Pavia, via Ferrata 1, 27100, Pavia, Italy E-mail: [email protected] Pilar Brufau Pilar García-Navarro Fluid Mechanics, LIFTEC-EINA, CSIC University of Zaragoza, C/Maria de Luna 3, 50018, Zaragoza, Spain