A numerical method for the simulation of three-dimensional incompressible twophase flows is presented. The proposed algorithm combines an implicit pressure stabilized finite element method for the solution of incompressible two-phase flow problems with a level set method implemented with a quadrature-free Discontinuous Galerkin (DG) method [1]. The use of a fast contouring algorithm [2] permits...

This study investigates the effect of nonlinear strengths sloshing on damping performance side-mounted perforated baffles and discusses influence resonance characteristics flow. The model score is adopted to evaluate strength water sloshing. A microscopic a volume-averaged macroscopic are established simulate flow in two-dimensional (2D) tank with baffles. In addition, series experimental tests...

Abstract In this paper, a nonlinear reduced-order model based on neural networks is introduced in order to vertical sloshing presence of Rayleigh–Taylor instability the free surface for use fluid–structure interaction simulations. A box partially filled with water, representative wing tank, first set harmonic motion via controlled electrodynamic shaker. Accelerometers and load cells at interfac...

Chandra X-ray observations revealed the presence of cold fronts – sharp contact discontinuities between gas regions with different temperatures and densities – in the centers of many, if not most, relaxed clusters with cool cores. We use high-resolution simulations of idealized cluster mergers to address the origin of such fronts. Typical observed gas density and temperature profiles are used a...

Abstract All aircraft are subject to a range of loading throughout ground and flight operations, which ultimately define the sizing weight structure. Active passive loads alleviation technologies provide an approach reduce dynamic arising from atmospheric gusts turbulence, leading more fuel-efficient designs. Within H2020 SLOWD project, fuel sloshing is being considered as method for alleviatin...

cylindrical steel tanks are important components of many industrial plants such as oil refineries and chemical plants. usually failure of cylindrical tanks leads to serious consequences. during the past earthquakes such as 1964 alaska and 1999 turkey seismic performance of cylindrical tanks revealed that tanks are seismically vulnerable. therefore, evaluation of seismic performance of these str...

The boundary-value problem for the linear horizontally-forced sloshing problem can be solved using two different classes of eigenfunction expansions. The first will be referred to as the ”cosine” expansion since the organizing centre is a cosine series in the x−direction (the horizontal direction), and the second is called the “vertical eigenfunction expansion” since the organizing centre is a ...

This paper describes a novel numerical model aiming at solving moving-boundary problems such as free-surface flows or fluid-structure interaction. This model uses a moving-grid technique to solve the Navier–Stokes equations expressed in the arbitrary Lagrangian-Eulerian kinematics. The discretization in space is based on the spectral element method. The coupling of the fluid equations and the m...