Large dust fractions can prevent the propagation of soundwaves

Timothée David--Cléris, Guillaume Laibe

Published 2021-04-28Version 1

Dust plays a central role in several astrophysical processes. Hence the need of dust/gas numerical solutions, and analytical problems to benchmark them. In the seminal dustywave problem, we discover a regime where sound waves can not propagate through the mixture above a large critical dust fraction. We characterise this regime analytically, making it of use for testing accuracy of numerical solvers at large dust fractions.