Nonplanar dust-acoustic waves and chaotic motions in Thomas Fermi dusty plasmas

摘要: The properties of linear and nonlinear nonplanar dust acoustic (DA) solitary waves chaotic behavior are investigated in an unmagnetized Thomas Fermi dusty plasma, whose components degenerate electrons, ions, negatively charged inertial cold grains. A dispersion relation is obtained solved numerically. It has been observed that excitation characteristics influenced by radial distance r, geometric term ν, ion-to-electron temperature ratio σi. We have also noted the addition a geometrical gives damping along axis. modified Korteweg-de Vries (KdV) equation derived employing reductive perturbation technique, its numerical solutions obtained. KdV discussed for grains planar frameworks. Upon introduction external periodic perturbation, perturbed studied geometry via some qualitative quantitative approaches. can give rise to periodic, quasiperiodic, motions DA waves. strength concentration h play major role switching parameter transition dynamic motion. developed chaos be weakened with variation h. affects dynamics which important observation this study.