Vortex dynamics of coherent and chaotic structures (including algorithms for computer simulations and diagnosis)
Substantial contributions have been made to understanding fundamental processes in two-dimensional inviscid and nearly dissipationless vortex dynamics through an approach called complementary modeling. We have identified and studied physical-space processes like merger, binding, axisymmetrization- and gradient-intensification of near-isolated regions of vorticity. We have employed a variety of algorithms and codes including pseudospectral, contour dynamical, and our recently introduced moment model. Through the last application, we have solved analytically an asymptotical representation of the symmetric merger problem and provided causes and conditions for merger that agree with pseudospectral and contour dynamical simulations. We have also delineated the essential parameters which control the final state of two nonidentical nearby vortices (asymmetric merger).
- Pub Date:
- December 1987
- Computerized Simulation;
- Dynamic Models;
- Inviscid Flow;
- Fluid Mechanics and Heat Transfer