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...

Abstract Sloshing is the violent motion of a resonant fluid in moving tank. When moves and interacts with tank, dynamic pressure from such an interaction can cause large deformations tank walls structure. In this study, 3D numerical simulation was carried out five variations LNG ship model: prismatic, rectangular, tube, spherical, new model filling ratio 25%. Forced oscillation roll f = 1.04 Hz...

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...

To carry out the investigation, a cylinder pressure model was developed based on the position of the crankshaft, engine load, engine speed, and fuel injection time. This model takes into account the maximum number of parameters involved. The accuracy of the model was verified by experimental results. The average error of the cylinder pressure, the average radical of the square of the error of t...

Early application of the simple axisymmetric mirror, requiring intermediate performance between a neutron source for materials testing Q=Pfusion/Pinput ~0.05 and pure fusion Q>10, are the hybrid applications. The Axisymmetric Mirror has attractive features as a driver for a fusion-fission hybrid system: geometrical simplicity, as well as the typical mirror features of inherently steady-state op...

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...