TAILIEUCHUNG - Construction, verification of a software for the 2D dam-break flow and some its applications

In this paper the numerical method for the shallow water equations is studied. The paper consists of 3 sections. In t he section 1 t he t heoretical basis and software IMECI-L2DBREAK for simulation of the 2D dam-break or dyke-break flows is outlined. In the section 2 some results in verification of the IMECH_2DBREAK by the test cases proposed in the big European Hydraulics Laboratories are shown. | Vietnam J ournal of Mechanics, VAST, Vol. 29, No. 4 (2007), pp. 539 - 550 CONSTRUCTION , VERIFICATION OF A SOFTWARE FOR THE 2D DAM-BREAK FLOW AND SOME ITS APPLICATIONS HOANG VAN LAI , NGUYEN THANH DON Institute of Mechanics Abstract . In this paper the numerical method for the shallow water equations is studied. The paper consists of 3 sections. In t he section 1 t he t heoretical basis and software IMECI-L2DBREAK for simulation of the 2D dam-break or dyke- break flows is o utlined. In the section 2 some results in verification of the IMECH_2DBREAK by the test cases proposed in the big European Hydraulics Laboratories are shown . In the last section some appli cations of IMECH_2DBREAK for the inundation problem in t he Red river delta in the Northern of Vietnam are presented. 1. INT R ODUCTI ON Analyses of the dam-break or t he dyke-break flows play an essential role when considering reservoir and dyke safeties for developing emergency plans. The rapid and continuing development of computing power a . . 1d techniques during the last years has allowed significant advances in the numerical modelling techniques in that difficult and important problem. The shallow water equations (SWE) are accepted for many practical applications as properly modelling the unsteady flow of water in general, modelling the dam-break and the dyke-break flows in particular. Many computational methods have been reported successful for SvVE. In the last few years a lot of effort has been devoted to the development of the finite volume method (FVM) in modelling the dam-break and the dyke-break flows and many papers have been published (see, for instance, [1] - [6]). · In this paper we concentrate on the Roe technique in FVM for SWE, especially in the case of the flow with shock waves . The paper is organized as follows. After introduction in the section 1 the main formulas of the FVM for SvVE are outlined, the boundary conditions for FVM are described. Applying those formulas and condit .

• Vật lý
• Vietnam Journal of Mechanics
• Verification of a software for the 2D dam break flow
• The 2D dam break flow
• The big European Hydraulics Laboratories
• Software IMECI L2DBREAK
• Dang Dinh Ang
• Nonlinear analysis and mechanics
• Dynamic problems involving stationary cracks
• The Wiener Hopt technique
• Dual integral equations
• Dual integrals in non linear fracture mechanics
• Non linear fracture mechanics
• Energy release rate
• Discuss the obtained
• The alpha finite element method (αFEM)
• Solid mechanics using triangular and tetrahedral elements
• Suitable computational cost
• NS FEM makes
• The upper bound property
• Non linear constitutive problems in solid mechanics
• Non linear constitutive problems
• Languages Gibian and special operators
• The application FEM
• Betts miller janjic convective parameterization scheme
• H14 31 model to forecast heavy rainfall in Vietnam
• Betts Miller Janjic
• Three rain seasons
• Manufacturing dry mixed cement mortar
• High compressive strength
• High flexural strength
• Low shrinkage and high watertightness for restoration
• Damaged hydraulic structures in Vietnam
• Standard gradient models and crack simulation
• Standard gradient models
• The propagation of cracks
• Damage mechanics and crack simulation
• The interaction between two parametric excitations
• The second and third degrees
• The asymptotic method of nonlinear mechanics
• Dynamic system governed
• Comparison of two hydrological model simulations
• Nam and Xinanjiang for Nong Son catchment
• The Central Vietnam
• The runoff components
• 3 D numerical simulation
• The tidal circulation
• The gulf of Tonkin
• The kinetic energy distribution
• Duality in the analysis of responses to nonlinear systems
• The analysis of responses
• The original nonlinear systems
• The study of nonlinear mechanics
• Aerodynamics of a wing in surface effect ship
• Theory and experiment
• Wing in surface effect ship
• The aerodynamic characteristics
• The Institute of Mechanics
• The error estimate
• The convergence rate for h
• p refinement
• The finite element analysis
• Three dimensional elastostatic mechanics problems
• Some initial experimental results
• Free water layer formation in horizontal pipes
• Water layer formation
• Hanoi Institute of Mechanics
• Bending vibration of beam elements under moving loads
• Considering vehicle braking forces
• Fluctuations of structures
• Beam elements according
• Continuous element for vibration analysis
• Thick shells of revolution
• Continous Element Method
• Finite element solutions
• Natural frequencies and harmonic responses
• Cast3m implementation of the extended finite element method
• The extended finite element method for cohesive crack
• Quasi brittle materia
• The proposed implementation
• The displacement discontinuities
• Buckling analysis of simply supported composite laminates subjected
• In plane compression load
• A novel mesh ffree method
• Alternative numerical technique
• Mesh free method
• A three story building
• Hedge algebras based fuzzy controller
• The structural system
• The El Centro earthquake
• Three story building against earthquake
• Laminar separation phenomenon combining with numerical calculations
• The turbulent separation
• The laminar separation
• Experimental study on mechanical properties
• Three phase polymer composite reinforced
• Glass fibers and titanium oxide particles
• Polymer composite reinforced
• Three phase composite
• Dynamic characteristics of elastically supported beam subjected
• A compressive axial force and a moving load
• The implicit Newmark method
• The Galerkin finite element method
• The axial force
• Eccentrically stiffened functionally graded plates and shallow shells
• Von Karman Donnell sense
• The formulation of governing equations
• The classical shell theory
• Mathematical modelling and control of the evolution
• Dynamic systems interacting with medium
• Mathematical modeling evolutional systems interacting
• Two conjugate mechanical subsystems
• Evaluating structural safety based on fuzzy set theory
• Evaluating structural safety
• The fuzzy reliability
• Simple beam structure