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Pregled bibliografske jedinice broj: 950535

Zbornik radova

Autori: Bašić, Josip; Blagojević, Branko; Ban, Dario; Ljubenkov, Boris; Degiuli, Nastia
Naslov: Lagrangian Finite Difference Method for Violent Fluid–Structure Interaction
( Lagrangian Finite Difference Method for Violent Fluid–Structure Interaction )
Izvornik: Proceedings of the 32nd Symposium on Naval Hydrodynamics / Abdel-Maksoud, M. (ur.). - Hamburg :
Skup: 32nd Symposium on Naval Hydrodynamics
Mjesto i datum: Hamburg, Njemačka, 5-10.08.2018.
Ključne riječi: Finite differences ; Free surface ; CFD ; Slamming ; Sloshing ; Green water
( Finite differences ; Free surface ; CFD ; Slamming ; Sloshing ; Green water )
Sažetak:
A meshless Lagrangian methodology is proposed for the purpose of numerical simulation of incompressible flows and estimation of hydrodynamic loads during fluid-structure impacts. The methodology can handle and simulate violent fluid-structure interaction with free surface fragmentation. It relies on so-called renormalised spatial operators that are described in mesh-free finite difference (MFD) context. The following novelties are introduced: Lagrangian pressure Poisson equation (PPE) formulation of the Navier– Stokes equations (NSE) is used to evolve fluid flow, the Poisson equation is solved in strong form by employing a novel discrete Laplacian, boundaries are represented by directly importing geometry models without volumetric meshing, and volume-conservative Lagrangian advection is handled by solving a set of geometrical constraints, which allows slight compressibility when needed. The proposed method is validated by simulating six experiments from the literature, and by comparing computed flow characteristics to the experimental data. The experiments include two-dimensional water entries of rigid bodies, dam breaking, and sloshing problems. Results of the simulations were found to be in good agreement with the experimental data. The proposed method's applicability to the estimation of hydrodynamic loads for three dimensional impacts will be assessed in future work.
Vrsta sudjelovanja: Predavanje
Vrsta prezentacije u zborniku: Cjeloviti rad (više od 1500 riječi)
Vrsta recenzije: Međunarodna recenzija
Izvorni jezik: eng
Kategorija: Znanstveni
Znanstvena područja:
Brodogradnja,Interdisciplinarne tehničke znanosti
Upisao u CROSBI: Josip Bašić (Josip.Basic.Brod@fesb.hr), 16. Kol. 2018. u 11:12 sati



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