Absolute Instability of Interacting Planar Mixing Layers and Wakes

Abstract

Experiments, direct numerical simulations and stability analyses found in the literature for asymmetric wakes have consistently stated that only a single self-sustaining frequency exists and it is associated with an absolutely unstable wake, where the mixing-layer mode remains convectively unstable.This report presents evidence from experiments (FA9550-21-1-0052) as well as linear stability analyses (FA9550-20-1-0359) suggesting that the mixing layer mode can become absolutely unstable as well, but only under certain parametric conditions involving appropriate velocity and length scales.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Feb 05, 2024
Accession Number
AD1229999

Entities

People

  • Leonardo Alves

Organizations

  • Fluminense Federal University

Tags

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Strategic Security Studies