Stratified Turbulence with High Dynamic Range
Abstract
Abstract Stably strati ed turbulence (SST) at high buoyancy Reynolds number involves quasi-two-dimensional (Q2D) and fully three-dimensional (3D) inertial ranges. Simulation data suggest that turbulence in the 3D range causes instabilities in the Q2D range that do not occur at low buoyancy Reynolds number. This leads us to hypothesize that important conclusions drawn from published SST data are likely not relevant to the high Reynolds number and low Froude number regime important to the Navy. Simulations are proposed of stably strati ed wakes and of simpler ow con gurations with the highest dynamic range possible on the computers operated by the DoD High Performance Computing Modernization Program to understand the e ects of dynamic range and buoyancy Reynolds number. Analyses include fully describing vorticity dynamics, closing the energy and vorticity budgets for the core region of strati ed wakes, and computing non-linear energy transfers between varies regions in wave number space. The results will be applied to large-eddy and Reynolds-averaged closure models for stable strati ed ows.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2016
- Source ID
- N000141512248
Entities
People
- Stephen De Bruyn Kops
Organizations
- Office of Naval Research
- United States Navy
- University of Massachusetts