Fluid structure interactions modelling in vented lean deflagrations

Modelling and Simulation of Lean Hydrogen-air Deflagrations in 120 M Enclosure

The paper describes CFD modelling of lean hydrogen mixture deflagrations. Large eddy simulation (LES) premixed combustion model developed at the University of Ulster to account phenomena related to large-scale deflagrations was adjusted specifically for lean hydrogen-air flames. Experiments by Kumar (2006) on lean hydrogen-air mixture deflagrations in a 120 m vessel at initially quiescent condi...

An immersed-shell method for modelling fluid-structure interactions.

The paper presents a novel method for numerically modelling fluid-structure interactions. The method consists of solving the fluid-dynamics equations on an extended domain, where the computational mesh covers both fluid and solid structures. The fluid and solid velocities are relaxed to one another through a penalty force. The latter acts on a thin shell surrounding the solid structures. Additi...

Collisions in 3d Fluid Structure Interactions Problems

This paper deals with the system composed by a rigid ball moving into a viscous incompressible fluid, over a fixed horizontal plane. The equations of motion for the fluid are the Navier–Stokes equations and the equations for the motion of the rigid ball are obtained by applying Newton’s laws. We show that for any weak solution of the corresponding system satisfying the energy inequality, the ri...

Modelling of Fluid-Structure Interactions in the Hydraulic Circuit of Passive Interconnected Suspensions

The pressure changes in the liquid-filled fluid circuits of Hydraulically Interconnected Suspensions (HIS) often lead to vibration of the whole pipeline and associated structures and hence become a source of structural noise, which degrades ride comfort. This paper presents the numerical and experimental investigation into the vibration of this kind of hydraulic circuit. The one-dimensional wav...

Modelling of fluid-structure interactions in stenosed arteries: effect of plaque deformability