Coherent structures in Dissipative Particle Dynamics simulations of the transition to turbulence in compressible shear flows

Autor:	van de Meent, Jan-Willem, Morozov, Alexander, Somfai, Ellak, Sultan, Eric, van Saarloos, Wim
Rok vydání:	2008
Předmět:	Physics - Fluid Dynamics Physics - Computational Physics
Zdroj:	Physical Review E 78, 015701(R), 2008
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevE.78.015701
Popis:	We present simulations of coherent structures in compressible flows near the transition to turbulence using the Dissipative Particle Dynamics (DPD) method. The structures we find are remarkably consistent with experimental observations and 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 non-linear instabilities. Comment: 4 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0807.1136 Zobrazit plný text záznamu View this record from Arxiv