Distributed Temperature Sensing of coherent structures in submesoscale, internal wave, and mixed lay
Abstract
We propose a tightly-integrated, cutting-edge observational and numerical investigation of coherent structures that arise during the, nonlinear evolution of shoaling internal waves, propagating internal bores, and ultra-sharp surface gravity currents. The proposed,work will leverage more than a decade of experience with fiber optic Distributed Temperature Sensing (DTS) with numerical modeling t,o yield an improved predictive capacity for small-scale dynamics in the ocean. Specifically, the proposed work will: 1) improve our,understanding of the physics of small-scale coherent structures in evolving, nonlinear coastal and open ocean flows using a purpose-,built fiber optic Distributed Temperature Sensing (DTS) system, 2) model nonlinear internal solitary waves and their interactions us,ing Kadomtsev-Petviashvili-type equations (evolution of nonlinear, long waves of small amplitude with slow dependence on the transve,rse coordinate), 3) quantify the flow physics of the streak-like, spanwise instability in shoaling solitary internal waves and near-,surface gravity currents and bores combining observations and hydrodynamic stability theory (weakly-nonlinear, resonant or non-reson,ant, secondary instability of infinitesimal disturbances of a primary wave), 4) produce an oceanographic quality, high fidelity DTS,instrument for use in scientific and applied scenarios, and 5) develop physics and simulation-based optimization of fiber optic DTS,antennas for fixed and towed applications. The proposed research has broad relevance to acoustic and non-acoustic vulnerabilities, h,ydrodynamic modeling, flow/structure interactions, and operational forecasting.This abstract is publicly releasable
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 08, 2022
- Source ID
- N000142212730
Entities
People
- Andrew J. Lucas
Organizations
- Office of Naval Research
- United States Navy
- University of California, San Diego