Göttingen 2025 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 15: Astrophysical Plasmas
P 15.1: Vortrag
Mittwoch, 2. April 2025, 16:15–16:30, ZHG102
Can a Compressible Jet Sustain Significant Turbulence in a (Magnetized) Turbulent Environment? — •David Kube1, Gabriele Camerlengo2, Wolf-Christian Müller1,3, and Jörn Sesterhenn2 — 1Centre of Astronomy and Astrophysics, Technische Universität Berlin — 2Chair of Applied Mechanics and Fluid Mechanics, Universität Bayreuth — 3Max-Planck/Princeton Center for Plasma Physics
The interaction of turbulence and jets is ubiquitous throughout the universe. A particularly intriguing example is the supersonically turbulent ISM, where the underlying driving mechanisms for turbulence remain insufficiently understood. Protostellar jets are promising candidates, as they are seen to impact the interstellar gas dynamics on parsec scales. Therefore, we aim to investigate the universal characteristics of jet-turbulence interactions using a simplified setup to identify fundamental mechanisms of potential importance for more complex configurations like star and structure formation. To address if a compressible jet can sustain turbulence in a decaying turbulent medium, we perform DNS of a jet impacting a turbulent cloud covering various combinations of the jet Mach number Mj and the RMS Mach number of the cloud Mt,rms. Furthermore, the influence of the magnetic field is assessed by comparing results from MHD simulations with those obtained by solving the compressible Navier-Stokes equations. In this talk, we discuss the numerical setup being used in the study and show first results demonstrating that for specific combinations of Mj and Mt,rms, notable interaction between the jet and the cloud occurs.
Keywords: Jet; Turbulence; MHD; DNS