2015/11/13 by Sanat Kumar Tiwari, Abhijit Sen, Tiwari, Sanat Kumar +1
Engineering · Mathematics · Physics and Astronomy · #Advanced Mathematical Physics Problems #FOS: Physical sciences #Fluid Dynamics and Turbulent Flows #Nonlinear Waves and Solitons #Plasma Physics (physics.plasm-ph) #physics.plasm-ph
paper · pdf · doi:10.48550/arxiv.1511.04182
arxiv created 2015/11/13 · openalex publication_date 2015/11/13 · arxiv updated 2015/11/16 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
We study the evolution of nonlinear ion acoustic wave excitations due to a moving charged source in a plasma. Our numerical investigations of the full set of cold fluid equations goes beyond the usual weak nonlinearity approximation and shows the existence of a rich variety of solutions including wakes, precursor solitons and pinned solitons that travel with the source velocity. These solutions represent a large amplitude generalization of solutions obtained in the past for the forced Korteweg deVries equation and can find useful applications in a variety of situations in the laboratory and in space wherever there is a large relative velocity between the plasma and a charged object.