A parallel Large Eddy Simulation in a finite element projection method for all flow regimes

Waters, Jiajia; Carrington, David B.

doi:10.1080/10407782.2016.1173453

Cited by 8 publications

(1 citation statement)

References 25 publications

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“…LES is an affordable approach to obtain results with a high degree of reliability in these types of flows, where both laminar and transitional regimes are present [43,44], as well as for the description of complex heat transfer mechanisms in forced or mixed-forced convective flows [3] with a moderate computational cost. For this reason, LES has been used by the authors in previous studies [37,38] to analyze the influence of the sidewalls on the flow structure and the heat transfer characteristics in mixed-forced convective flows over a low aspect ratio BFS, and it is also the approach used in this study.…”

Section: Governing Equations and Numerical Schemementioning

confidence: 99%

Sidewall effects on heat transfer in narrow backward facing step in transitional regime

Juste

Leon

López-Núñez

et al. 2019

Numerical Heat Transfer, Part A: Applications

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In this work, we study numerically with large eddy simulation, the effects induced by the three-dimensional geometry of the channel on the flow topology that exists when the three-dimensional intrinsic instabilities appear in a backward facing step flow with low aspect ratio for Reynolds in the transitional regime (Re ¼ 1,000-1,600), and its impact on the heat flux in the lower wall. Under the transitional regime, the three-dimensional instabilities begin to appear, but they can be masked by the flows due to the presence of the side walls. The study is carried out with two boundary conditions in the sidewalls, slip, and no-slip, to discriminate between the three-dimensionality induced by the geometry and the intrinsic threedimensional instabilities. The results obtained are compared between the two boundary conditions, establishing what type of flow prevails and its influence on time-averaged mean Nusselt number for all Reynolds.

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