Numerical issues in Lagrangian tracking and topological evolution of fluid particles in wallbounded turbulent flows

Atkinson, Callum and Hackl, Jason and Stegeman, Paul and Borrell Nogueras, Guillem and Soria, Julio (2014). Numerical issues in Lagrangian tracking and topological evolution of fluid particles in wallbounded turbulent flows. "Journal of Physics: Conference Series", v. 506 (n. 1); pp.. ISSN 1742-6596. https://doi.org/10.1088/1742-6596/506/1/012003.

Description

Title: Numerical issues in Lagrangian tracking and topological evolution of fluid particles in wallbounded turbulent flows
Author/s:
  • Atkinson, Callum
  • Hackl, Jason
  • Stegeman, Paul
  • Borrell Nogueras, Guillem
  • Soria, Julio
Item Type: Article
Título de Revista/Publicación: Journal of Physics: Conference Series
Date: 2014
ISSN: 1742-6596
Volume: 506
Subjects:
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Mecánica de Fluidos y Propulsión Aeroespacial
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The determination of the local Lagrangian evolution of the flow topology in wall-bounded turbulence, and of the Lagrangian evolution associated with entrainment across the turbulent / non-turbulent interface into a turbulent boundary layer, require accurate tracking of a fluid particle and its local velocity gradients. This paper addresses the implementation of fluid-particle tracking in both a turbulent boundary layer direct numerical simulation and in a fully developed channel flow simulation. Determination of the sub-grid particle velocity is performed using both cubic B-spline, four-point Hermite spline and higher-order Hermite spline interpolation. Both wall-bounded flows show similar oscillations in the Lagrangian tracers of both velocity and velocity gradients, corresponding to the movement of particles across the boundaries of computational cells. While these oscillation in the particle velocity are relatively small and have negligible effect on the particle trajectories for time-steps of the order of CFL = 0.1, they appear to be the cause of significant oscillations in the evolution of the invariants of the velocity gradient tensor.

Funding Projects

TypeCodeAcronymLeaderTitle
FP7ERC-2010.AdG-20100224UnspecifiedUnspecifiedUnspecified

More information

Item ID: 37479
DC Identifier: http://oa.upm.es/37479/
OAI Identifier: oai:oa.upm.es:37479
DOI: 10.1088/1742-6596/506/1/012003
Official URL: http://iopscience.iop.org/article/10.1088/1742-6596/506/1/012003/meta;jsessionid=F2148A171A60E3BD8A76289E2CA5EFE5.c1
Deposited by: Memoria Investigacion
Deposited on: 19 Oct 2015 07:53
Last Modified: 19 Oct 2015 08:21
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