Large-Eddy Simulations of cavitation in a square surface cavity

Influence of Bubbles Causing Cavitation on Spool Oscillation of a Direct Drive Servovalve

“…The changes in the macroscopic morphology of cavitation include occurrence, movement, collapse, etc, and the transient cavitation will cause the changes of other parameters as well. In order to more accurately describe the severity of the evaporation phenomenon in the valve cavity, the local cavitation fraction α p and the surface average cavitation fraction α s , are defined [ 26 , 27 ].…”

Assessment of porous media instead of slatted floor for modelling the airflow and ammonia emission in the pit headspace

“…It is known that for the cavity flow with high mean air velocity, the complex feedback phenomenon between the cavity walls resulted in a high shear layer which is inherently unstable and exhibits self-sustained oscillations. The self-sustained oscillations exist in more than one stable state, making the flow to be highly unsteady and transitional (Wang et al, 2011;Dai et al, 2014). In this work, the airflow in the pit headspace was regarded as a sort of cavity flow.…”

Computations and measurements of the global drag force on a Tension-Leg Platform

“…The Large-Eddy Simulation (LES) approach is increasingly thought to be a reliable tool for capturing the large-scale unsteady features of separated flows and hence provide a good estimate of the all important resulting global drag force on the structure. Previous relevant studies include those of Lu et al (2002) who explored the effects of using non-uniform grids on the simulations, those of Bakker and Oshinowo (2004) and Hartmann et al (2004) who explored the sensitivity of the simulations to the choice of the sub-grid scale model, and those of Li et al (2011) and Dai et al (2014) who assessed its performance in flows where vortex shedding was present. In this paper, we report on experiments conducted for the purpose of obtaining data on the global drag force on a model Tension-Leg Platform, and on the use of these https://doi.org/10.1016/j.oceaneng.…”