We describe a mixed Eulerian-Lagrangian approach for solving fluid-structure interaction (FSI) problems. The technique, which uses deforming composite grids (DCG), is applied to FSI problems that couple high speed compressible flow with elastic solids. The fluid and solid domains are discretized with composite overlapping grids. Curvilinear grids are aligned with each interface and these grids ...

A classical problem in fluid mechanics is that of a jet impinging on a solid surface. During the 1960’s, partly driven by applications in the steel industry, the exploration of this field of study shifted towards the interaction between a gas jet and a deformable liquid surface (Figure 1), where often the shape of the deformation and its relation to the balance of forces were studied. This is a...

We present a robust and efficient method for simulating Lagrangian solid-fluid coupling based on new operator splitting strategy. use variational formulations to approximate fluid properties interactions, introduce unified two-way formulation SPH fluids FEM solids using interior point barrier-based frictional contact. split the resulting optimization problem into phase solid-coupling novel time...

computational fluid dynamics (cfd) simulations of gas-solid flow through a positive low-pressure pneumatic conveyor were performed using eulerian-eulerian framework. pressure drop in pneumatic conveying pipelines, creation and destruction of plugs along the horizontal and vertical pipes, effect of 90° elbows and u-bends on cross-section concentrations, and rope formation and dispersion were num...

The science of fluid dynamics describes the motion of liquids and gases and their interaction with solid bodies. It is a broad, interdisciplinary field that touches almost every aspect of our daily lives, and it is central to much of science and engineering. Fluid dynamics impacts defense, homeland security, transportation, manufacturing, medicine, biology, energy and the environment. Predictin...

natural convection heat transfer from a vertical heated plate in a saturated porous medium is analyzed under thermal non-equilibrium assumptions. the plate is maintained at a non uniform temperature and the fluid is considered to be with internal heat generation. the coupled momentum and energy equations for fluid and solid phases are transformed to a similarity format, and solved numerically. ...

We present an interface and geometry preserving (IGP) method for modeling fully Eulerian fluid-structure interaction via phase-field formulation. While the time-dependent mobility model preserves hyperbolic tangent profile, proposed maintains of solid-fluid by minimizing volume-conserved mean curvature flow. To reduce flow, we construct a gradient-minimizing velocity field (GMV) convection orde...

A computational fluid–solid dynamic model is employed to simulate the interaction between water waves and a consolidated ice cover. The solves Navier–Stokes equations for ocean-wave flow around solid body, behavior formalized by Maxwell viscoelastic model. Model predictions are compared against experimental flume tests of interacting with plates. decay rate wave dispersion predicted shown be in...

Results showed that the way the fluid-wall interaction is modeled in molecular dynamics simulations has a strong effect on the resultant simulation of liquid injection into a gas. It was found that modeling the wall as individual atoms (atomistic model) interacting with the fluid resulted in the fluid remaining in an injection tube absent any pressure or body force to force it into a gaseous re...