Multiscale modeling of entrained and surface bubbly flows in the near wake of a surface ship
Abstract
This proposal is for a four-year basic research effort aimed at leveraging advances in fundamental research on bubbly turbulent flows characteristic of the near wake of a surface ship to improve large-scale multiphase computational ship hydrodynamics capabilitiesthrough state-of-the-art multiscale modeling. The proposed multiscale modeling effort utilizes the emerging WakeLES capability, with input from the fundamental understanding gained from small-scale simulation techniques and mathematical modeling, to assess and further establish the relevant closure models needed for the design and operation of naval vessels.Building on the recent understanding gained from the work developing WakeLES by the PI while co-PI at MIT, this proposed effort focuses on two key research aims: Aim I. Efficient and accurate multiscale two-fluid Large Eddy Simulation (LES) capability. Establish an efficient and accurate multi-scale Large Eddy Simulation (LES) capability for the bubbly near wake of the ship from the stern region to 20$+$ drafts of the ship wake. Aim II. Sub-grid scale bubble-source breaking wave entrainment models. Develop and improve upon sub-grid scale bubble-sourcebreaking wave entrainment models through simulation of canonical quasi-steady breaking waves (DNS/LES) representative of the near-ship diverging breaking wave region.This proposed effort is intended serve as the essential bridge from the fundamental research on the spatial and temporal characteristics of the entrained bubbly flow to the full-scale simulation capabilities being developed within the core of the ONR Code 331 program. Just as bridges serve to enhance the flow of valuable commodities across an insurmountable gap, this effort will enhance both fundamental research efforts into bubbly turbulent flows and the computational developments within(and outside of) the computational ship hydrodynamics community.This abstract is Approved for Public Release.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 11, 2024
- Source ID
- N000142412239
Entities
People
- Kelli Hendrickson
Organizations
- Office of Naval Research
- United States Navy
- University of North Carolina at Chapel Hill