Coherent structures in dissipative particle dynamics simulations of the transition to turbulence in compressible shear flows.
We present simulations of coherent structures in compressible flows near the transition to turbulence using the dissipative particle dynamics method. The structures we find are remarkably consistent with experimental observations and direct numerical simulations (DNS) simulations of incompressible flows, despite a difference in Mach number of several orders of magnitude. The bifurcation from the laminar flow is bistable and shifts to higher Reynolds numbers when the fluid becomes more compressible. This work underlines the robustness of coherent structures in the transition to turbulence and illustrates the ability of particle-based methods to reproduce complex nonlinear instabilities.
van de Meent
Jan-Willem
JW
Instituut-Lorentz, University of Leiden, Postbus 9506, 2300 RA Leiden, The Netherlands.
Morozov
Alexander
A
Somfai
Ellák
E
Sultan
Eric
E
van Saarloos
Wim
W