Topical Problems of Fluid Mechanics


Institute of Thermomechanics AS CR, v.v.i.	CTU in Prague Faculty of Mech. Engineering Dept. Tech. Mathematics	MIO Université du Sud Toulon Var - AMU - CNRS - IRD	Czech Pilot centre ERCOFTAC

Monolithic Fluid Structure Interaction Model, Application to Water Entry Problem
F. Golay
Abstract:
We consider the interaction between an air-water ?ow and a rigid structure using a fast accurate numerical model. Following the 3D low Mach compressible Euler model previously developed and validated, a compressible ?uid-structure interaction model is proposed. In the context of a ?ctitious domain, a volumic penalization is applied inside the body to ensure a rigidity constraint through a penalized velocity in order to get the correct motion of the rigid body. The accuracy of this simple model is improved using block-based adaptive mesh re?nement technique. The improvement and the validity of our ?uid-structure interaction procedure is investigated through the numerical simulation of the water entry of a cylinder freely falling and impacting the water. This test case is compared to experimental data and other numerical simulations.
Keywords:
Euler equations, low Mach, compressible, bi-?uid, mesh re?nement, ?uid-structure interaction, ?ctitious domain, penalization, projection method, interface-sharpening

Fulltext: PDF DOI: https://doi.org/10.14311/TPFM.2018.016

In Proceedings Topical Problems of Fluid Mechanics 2018, Prague, 2018 Edited by David Šimurda and Tomáš Bodnár, pp. 123-130 ISBN 978-80-87012-65-9 (Print) ISSN 2336-5781 (Print)