Stochastic generation of velocity fluctuation for turbulent inflow and initial condition

Mani Fathali, M. Klein, Tim Broeckhoven, Christian Lacor, Martine Baelmans

Research output: Chapter in Book/Report/Conference proceedingConference paper

Abstract

Direct or large eddy simulation of a turbulent °ow ¯eld is strongly
in°uenced by its initial or in°ow boundary condition. This paper aims to present a
new stochastic approach to generate an arti¯cial turbulent velocity ¯eld for initial
or in°ow boundary condition based on digital ¯ltering. The generated velocity ¯eld
reproduces locally desired Reynolds-stress components and integral length scales
including cross-integral length scales. The method appears to be simple, °exible and
more accurate in comparison with previously developed methods. The accuracy and
performance of the method is demonstrated by Direct Numerical Simulation(DNS)
of a homogeneous turbulent shear °ow. To assess the accuracy and performance of
the method, simulation results are compared with a reference simulation.
Original languageEnglish
Title of host publicationProc. Of ICCFD4 Conf., 10-13 july, Ghent
Publication statusPublished - 2006
EventFinds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet - Stockholm, Sweden
Duration: 21 Sep 200925 Sep 2009

Conference

ConferenceFinds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet
CountrySweden
CityStockholm
Period21/09/0925/09/09

Keywords

  • cfd
  • LES
  • inlet condition
  • stochastic

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