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Prediction of Small-Scale Cavitation in a High Speed Flow Over an Open Cavity Using Large Eddy

Summary: Prediction of Small-Scale Cavitation in a High Speed
Flow Over an Open Cavity Using Large Eddy
Ehsan Shams
Sourabh V. Apte
Computational Flow Physics Laboratory
School of Mechanical Industrial and Manufacturing Engineering
Oregon State University, 204 Rogers Hall, Corvallis, OR 97331
Large-eddy simulation of flow over an open cavity corresponding to the experimental
setup of Liu and Katz [1] is performed. The filtered, incompressible Navier-Stokes equa-
tions are solved using a co-located grid finite-volume solver with the dynamic Smagorin-
sky model for subgrid scale closure. The computational grid consists of around seven
million grid points with three million points clustered around the shear layer and the
boundary-layer over the leading edge is resolved. The only input from the experimental
data is the mean velocity profile at the inlet condition. The mean flow is superimposed
with turbulent velocity fluctuations generated by solving a forced periodic duct flow at
free-stream Reynolds number. The flow statistics, including mean and rms velocity
fields and pressure coefficients, are compared with the experimental data to show rea-
sonable agreement. The dynamic interactions between traveling vortices in the shear


Source: Apte, Sourabh V. - School of Mechanical, Industrial, and Manufacturing Engineering, Oregon State University


Collections: Engineering