Large eddy simulation with a dynamic subgrid-scale model of turbulent heat transfer in an orthogonally rotating rectangular duct with transverse rib turbulators

Murata, Akira; Mochizuki, Sadanari

doi:10.1016/s0017-9310(99)00205-7

Cited by 70 publications

(19 citation statements)

References 27 publications

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“…Among these, one may cite: [1,2,26,27,34,39]. Nevertheless, in most of these investigations, the main interest was focused on reproduction and prediction of the Eulerian statistics (average) and of the resolved turbulent field, without a real topology analysis.…”

Section: Introductionmentioning

confidence: 99%

Flow Features in a Fully Developed Ribbed Duct Flow as a Result of MILES

Lohász

Rambaud

Benocci

2006

Flow Turbulence Combust

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The present contribution describes the topology associated with the turbulent flow in a square duct partially blocked by a rib of square section mounted on a single wall. The flow is simulated by means of a MILES method and the resulting velocity fields are analysed using the concepts of stream surface, vortex core detection, wall streamline and bifurcation line. Instantaneous and time averaged coherent structures are extracted applying the second scalar invariant of the velocity gradient tensor (so-called Q criterion), respectively, to the instantaneous and time averaged velocity fields. This postprocessing reveals significant 3D effects induced by the geometry, namely the influence of the side walls, which is clearly identified. The combination of the different visualisation techniques offers a complement to the standard representation based on Eulerian statistics and contributes to a deeper understanding of this complex flow.

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Section: Introductionmentioning

confidence: 99%

Flow Features in a Fully Developed Ribbed Duct Flow as a Result of MILES

Lohász

Rambaud

Benocci

2006

Flow Turbulence Combust

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“…The value of the turbulent Prandtl number, , has been selected based on the analysis carried out by Moin et al (1991) in the case of a channel flow with a fluid of molecular Prantdl number equal to 0.71. Since the value of the turbulent Prandtl number was about 0.5 in most of the domain in the latter investigation, the present investigation employs = 0.5, similarly to Murata and Mochizuki (2000) and Sewall and Tafti (2006).…”

Section: Test Case and Numerical Methodsmentioning

confidence: 93%

Heat Transfer Analysis Of A Rotating Ribbed Channel By Means Of Large Eddy Simulations

Mayo

Arts

Gicquel

2017

European Conference on Turbomachinery Fluid Dynamics and Hermodynamics

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The present work studies the three-dimensional flow field and heat transfer in a model of an internal cooling channel in rotation by means of Large Eddy Simulations (LES). The selected geometry corresponds to a section of an experimental facility documented in the open literature. The channel presents a low aspect ratio cross section, one ribbed wall and square ribs placed perpendicularly to the main flow direction. In order to reduce the computational cost, the length of the computational domain is equal to the rib pitch of the laboratory model, whereas periodic boundary conditions are provided at the inlet and outlet of the domain. The simulations are carried out under the same conditions as in the experiments, namely at a Reynolds number equal to 15,000 and a Rotation number equal to 0.3. The first objective of this work is to provide the three dimensional flow field that experiments were not able to retrieve, and to discuss its impact on the wall heat transfer. Moreover, the dimensionless mean temperature fields in static and rotating conditions are introduced. Secondly, this work aims to study the suitability of an open source Computational Fluid Dynamics (CFD) solver to investigate the heat transfer phenomena in turbine internal cooling. With the selected LES turbulence model and boundary conditions, the present simulations provide a good agreement with the detailed experimental data.

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“…Encouraging agreement is found with mean velocity and heat transfer measurements. Murata and Mochizuki (2000) make bi-periodic dynamic Smagorinsky LES of a rotating ribbed passage with N = 91,125-274,625. The bulk Reynolds number ranges between 4,000 and 9,000.…”

Section: Ribbed Passagesmentioning

confidence: 99%

Applications of Eddy Resolving Methods

Tucker

2014

Unsteady Computational Fluid Dynamics in Aeronautics

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Large eddy simulation with a dynamic subgrid-scale model of turbulent heat transfer in an orthogonally rotating rectangular duct with transverse rib turbulators

Cited by 70 publications

References 27 publications

Flow Features in a Fully Developed Ribbed Duct Flow as a Result of MILES

Flow Features in a Fully Developed Ribbed Duct Flow as a Result of MILES

Heat Transfer Analysis Of A Rotating Ribbed Channel By Means Of Large Eddy Simulations

Applications of Eddy Resolving Methods

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