Laminar gaps ('anti-puffs') in turbulent pipe flow at Re=2400-2550 are stabilized by self-tuning front speeds and close with exponentially distributed lifetimes, implying a sharp onset of homogeneous turbulence near Re≈2900.
The Openpipeflow Navier--Stokes Solver
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abstract
Pipelines are used in a huge range of industrial processes involving fluids, and the ability to accurately predict properties of the flow through a pipe is of fundamental engineering importance. Armed with parallel MPI, Arnoldi and Newton--Krylov solvers, the Openpipeflow code can be used in a range of settings, from large-scale simulation of highly turbulent flow, to the detailed analysis of nonlinear invariant solutions (equilibria and periodic orbits) and their influence on the dynamics of the flow.
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physics.flu-dyn 1years
2026 1verdicts
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Laminar gaps mirror turbulent puffs in pipe flow
Laminar gaps ('anti-puffs') in turbulent pipe flow at Re=2400-2550 are stabilized by self-tuning front speeds and close with exponentially distributed lifetimes, implying a sharp onset of homogeneous turbulence near Re≈2900.