Sheet to cloud cavitation over a sharp wedge is studied at Re = 203, 000 using large eddy simulations. Transition of sheet cavity into the cloud due to the propagation of condensation fronts as observed in the experiments by Ganesh et. al., is investigated using a finite rate homogeneous mixture model. Presence of condensation front in the simulations is illustrated using the instantaneous flow field. Mean void fractions obtained using LES as well as from simulations performed without considering the spanwise variation (i.e. in 2D) are compared to the X-ray densitometry showing good agreement. Strouhal frequency of periodic shedding of cloud and propagation speed of the front is computed. The transport of vorticity is investigated using the vorticity transport equation.
As indicated in Figure 1-3, there are two types of bearing configurations: (1) thrust bearing to support the normal load and (2) journal bearing to support the radial load. Often separate thrust and journal bearings are designed and implemented to support a rotating impeller. In certain cases more complex designs are used to combine the two bearing types. Nevertheless, the basic geometry that makes load support possible in hydrodynamic bearings is a converging wedge. In other words, the fluid is pulled into a converging gap through shear and a force perpendicular to the flow direction is produced, providing load support. Analysis of flow and prediction of load carrying ability of bearings starts with the Reynolds equation.