Lagrangian-Eulerian micromotion and wave heating in nonlinear self-excited dust-acoustic waves.
We investigate particle-wave microdynamics in the large amplitude self-excited dust acoustic wave at the discrete level through direct visualization. The wave field induces dust oscillations which in turn sustain wave propagation. In the regular wave with increasing wave amplitude, dust-wave interaction with uncertain temporary crest trapping and dust-dust interaction lead to the transition from cyclic to disordered dust motion associated with the liquid to the gas transition, and anisotropic non-Gaussian heating. In the irregular wave, particle trough-trapping is also observed, and the heating is nearly Gaussian and less anisotropic.
Department of Physics and Center for Complex Systems, National Central University, Jhongli, Taiwan 32001, Republic of China.
Chen-Ting
CT
Liao
Lee-Wen
LW
Teng
Chen-Yu
CY
Tsai
Chong-Wai
CW
Io
Lin
L
I