Large eddy simulation of passive scalar transport in a high Schmidt number turbulent incompressible wake with experimental validation

The highly turbulent flow occurring inside (electro)chemical reactors requires accurate simulation of scalar mixing if computational fluid dynamics (CFD) methods are to be used with confidence in design. This has motivated the present paper, which describes the implementation of a passive scalar transport equation into a hybrid spectral/finite-element code. Direct numerical simulations (DNS) and large eddy simulation (LES) were performed to study the effects of gravitational and centrifugal potentials on the stability of incom-pressible Taylor-Couette flow. The flow is confined between two concentric cylinders with an inner rotating cylinder while the outer one is at rest. The Navier-Stokes equations with the uncoupled convection–diffusion–reaction (CDR) equation are solved using a code named spectral/finite element large eddy simulations (SFELES) which is based on spectral development in one direction combined with a finite element discretization in the remaining directions. The performance of the LES code is validated with published DNS data for channel flow. Velocity and scalar statistics showed good agreement between the current LES predictions and DNS data. Special attention was given to the flow field, in the vicinity of Reynolds number of 68.2 with radii ratio of 0.5. The effect of Sc on the concentration peak is pointed out while the magnitude of heat transfer shows a dependence of the Prandtl number with an exponent of 0.375.

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Large eddy simulation of passive scalar transport in a stirred tank for different diffusivities

International Journal of Heat and Mass Transfer ◽

10.1016/j.ijheatmasstransfer.2015.08.030 ◽

2015 ◽

Vol 91 ◽

pp. 885-897 ◽

Cited By ~ 6

Author(s):

Hyun Sik Yoon ◽

S. Balachandar ◽

Man Yeong Ha

Keyword(s):

Large Eddy Simulation ◽

Passive Scalar ◽

Scalar Transport ◽

Stirred Tank ◽

Eddy Simulation ◽

Passive Scalar Transport ◽

Large Eddy

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Test of Large Eddy Simulation in Complex Flow with High Schmidt Number

Computational Science and Its Applications - ICCSA 2006 - Lecture Notes in Computer Science ◽

10.1007/11751649_52 ◽

2006 ◽

pp. 476-483

Author(s):

Yang Na ◽

Seungmin Lee

Keyword(s):

Large Eddy Simulation ◽

Schmidt Number ◽

Complex Flow ◽

Eddy Simulation ◽

High Schmidt Number ◽

Large Eddy

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Large-eddy simulation of high-Schmidt number mass transfer in a turbulent channel flow

Physics of Fluids ◽

10.1063/1.869138 ◽

1997 ◽

Vol 9 (2) ◽

pp. 438-455 ◽

Cited By ~ 103

Author(s):

Isabelle Calmet ◽

Jacques Magnaudet

Keyword(s):

Mass Transfer ◽

Large Eddy Simulation ◽

Channel Flow ◽

Schmidt Number ◽

Turbulent Channel Flow ◽

Eddy Simulation ◽

High Schmidt Number ◽

Large Eddy

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Immersed Boundary Method for Large Eddy Simulation and Lagrangian Stochastic Modeling of Passive Scalar Dispersion Downstream of an Obstacle

ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting: Volume 1, Symposia – Parts A, B, and C ◽

10.1115/fedsm-icnmm2010-30697 ◽

2010 ◽

Author(s):

C. Le Ribault ◽

S. Simoe¨ns

Keyword(s):

Large Eddy Simulation ◽

Immersed Boundary Method ◽

Passive Scalar ◽

Immersed Boundary ◽

Two Dimensional ◽

Scalar Dispersion ◽

Eddy Simulation ◽

Boundary Method ◽

Passive Scalar Transport ◽

Large Eddy

A large-eddy simulation (LES) using the atmospheric code ARPS is performed to study the passive scalar dispersion downstream of an obstacle. An immersed boundary method has been introduced to take into account the obstacle. To simulate the scalar dispersion, instead of resolving the passive scalar transport equation, fluid particles containing scalar are tracked in a Lagrangian way. The results of the LES are compared with the experiments of Vinc¸ont et al. [1]. In those experiments, simultaneous measurements of the velocity and scalar concentration fields have been made in the plume emitting from a two-dimensional line source flushed with the wall. The source is one obstacle height downstream of a two-dimensional square obstacle located on the wall of a turbulent boundary layer. Our simulations predict the qualitative and quantitative features of the experimental results.

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