• Recherche,

Mini-séminaire du LHEEA 09/11/2017 : “Feasiblity Study on the Coupling of Potential and Viscous Flows", Youngmyung CHOI

Le Laboratoire de recherche en Hydrodynamique, Énergétique et Environnement Atmosphérique de Centrale Nantes (LHEEA) organise des mini-séminaires tous les jeudis midi. Rendez-vous en salle de télé-enseignement au bâtiment D les jeudis à 13h45. Allez-y, c'est ouvert à tous !

Le 9 novembre 2017 de 13:45 à 14:30

Le 9 novembre 2017 de 13:45 à 14:30

Le 9 novembre 2017 de 13:45 à 14:30

Le 9 novembre 2017 de 13:45 à 14:30

Le 9 novembre 2017 de 13:45 à 14:30

Le 9 novembre 2017 de 13:45 à 14:30

Le 9 novembre 2017 de 13:45 à 14:30

Le 9 novembre 2017 de 13:45 à 14:30

Le 9 novembre 2017 de 13:45 à 14:30

Le 9 novembre 2017 de 13:45 à 14:30

Le 9 novembre 2017 de 13:45 à 14:30

Le 9 novembre 2017 de 13:45 à 14:30

Le 9 novembre 2017 de 13:45 à 14:30

Le 9 novembre 2017 de 13:45 à 14:30

Le 9 novembre 2017 de 13:45 à 14:30

Le 9 novembre 2017 de 13:45 à 14:30

Cette semaine :

Youngmyung CHOI (PhD student H2I) will present (in english) his work at 1:45 PM on “Feasiblity Study on the Coupling of Potential and Viscous Flows".

Abstract: "Governing equations to solve wave-structure interaction problems are categorized into potential flow and viscous flow. Potential flow based on perfect fluids has been widely used to simulate interaction problem up to moderate wave conditions. As the waves become nonlinear, the needs of viscous flow solver (Navier-Stokes Equation) arises because potential flow cannot handle nonlinear phenomenon (wave breaking, ... ) and the mathematical and numerical modeling becomes complex. But the viscous flow solvers also have difficulties dealing with radiation condition of waves and decaying of waves due to damping. To deal with radiation condition of waves, the viscous flow solver needs a hugh computational domain demanding long simulation time.
Mentioned problems are well known for hydrodynamists, and many researchers have been attempted to couple two different flows to make viscous flow be used in a practical free surface problem. Before devoting the coupling of two different flows, a preliminary study is conducted to see the feasibility and to aware problems arising from coupling. Propagating waves and swaying 2D simple geometry with different outlets are investigated. Mesh stretched outlet and relaxation scheme blending computation quantities to target values are used to see the coupling effect. The accuracy of solution and computation time are analyzed."
Publié le 6 novembre 2017 Mis à jour le 8 juillet 2018