Abstract
The evolution of two-dimensional unsteady viscous vortices perturbed by a compression/expansion wave has been simulated numerically. Direct numerical simulations of the time-dependent compressible Navier-Stokes equations are performed using a spectral collocation method. The numerical shock deformation shows a very good agreement with the observations in a shock tube. The results of the two-dimensional simulations show the creation of vortices that is attributed to the influence of baroclinic and dilatational effects and the elliptical vortex underwent slight precession (tilting) in the direction of vortex rotation. The mechanisms responsible for the onset of acoustic wave propagation by a vortex and its alternate compression-rarefaction nature are described.
| Original language | English |
|---|---|
| Pages (from-to) | 2836-2843 |
| Number of pages | 8 |
| Journal | Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B |
| Volume | 64 |
| Issue number | 625 |
| DOIs | |
| State | Published - 1998 |
Keywords
- Baroclinic torque
- Compressible viscous vortex
- DNS
- Dilatation effects
- Shock wave
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanical Engineering