Sub-Grid Cavitation Inception Models for Computational Fluid Dynamics
Abstract
Sub-Grid Cavitation Inception Models for Computational Fluid Dynamics. This project aims at development and validation of a model of homogeneous cavitation inception for computational fluid dynamics (CFD) RANS, hybrid RANS/LES and LES solvers, based on a probabilistic description of the inception process at the subgrid level. The model is based on predicting pressure fluctuations and cavitation rates at the unresolved subgrid level using direct numerical simulation solutions for homogeneous isotropic turbulence (HIT). The methodology produces a cavitation frequency per unit volume and nuclei size at each grid point, which can be translated to a cavitation rate per unit volume upon integration with the nuclei size distribution, enabling prediction of inception location and cavitation number. The methodology will be tested for three cases with available experimental data: a foil tip vortex, a foil tip vortex against a wall (the tip/gap problem) and the ducted propeller P5206.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 08, 2020
- Source ID
- N000142012553
Entities
People
- Pablo M. Carrica
Organizations
- Office of Naval Research
- United States Navy
- University of Iowa