Large eddy simulation of turbulent channel flow with mass transfer at high-Schmidt numbers

Dong, Yuhong; Lu, Xi‐Yun; Zhuang, Lixian

doi:10.1016/s0017-9310(02)00456-8

Cited by 37 publications

(33 citation statements)

References 30 publications

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“…[5]. Furthermore, the corresponding computational code used in this study has been validated and veriÿed by our previous work [32][33][34]. Thus, it can be conÿrmed that our calculation is reliable for the prediction of statistical quantities of turbulent ow in a concentric annular channel.…”

Section: Validationsupporting

confidence: 70%

Large eddy simulation of turbulent concentric annular channel flows

Liu

2004

Numerical Methods in Fluids

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SUMMARYFully developed turbulent concentric annular channel ow has been investigated numerically by use of large eddy simulation (LES) technique coupled with a localized one-equation dynamic subgrid-scale (SGS) model. The objective of this study is to deal with the behaviour of turbulent ow near the inner and outer walls of the concentric annular channel and to examine the e ectiveness of LES technique for predicting the turbulent ow in uenced by the transverse curvature e ect. The computations are performed for the Reynolds number Re = 180, 395 and 640, based on an averaged friction velocity and the annular channel width with the inner and outer cylinder radius being R i = 1 and Ro = 2. To validate the present approach, calculated results for turbulent pipe ow and concentric annular channel ow are compared with available experimental data and direct numerical simulation results, which conÿrms that the present approach can be used to study turbulent concentric annular channel ow satisfactorily. To elucidate turbulence characteristics in the concentric annular channel, some typical quantities, including the resolved velocity, turbulence intensity, turbulent eddy viscosity, SGS kinetic energy, SGS dissipation rate, Reynolds stress budgets, and turbulence structures based on the velocity uctuations, are analysed.

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Section: Validationsupporting

confidence: 70%

Large eddy simulation of turbulent concentric annular channel flows

Liu

2004

Numerical Methods in Fluids

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“…These are the scales which need to be accounted for when performing "turbulent simulations." For example, in LES, the large-scale dynamics are explicitly solvedfor, or resolved, while the small-scales dynamics are modeled (Smagorinsky 1963;De Stefano and Vasilyev 2002;Dong et al 2003;Kurose and Makino 2003;Loeffler et al 2011). This approach, when performed correctly, facilitates affordable and reliable computations (Givi 1989;Garrick 1995;Colucci et al 1998;Pope 2000;Sagaut 2001;Givi 2006).…”

Section: Particle Growth Ratementioning

confidence: 99%

Effects of Turbulent Fluctuations on Nanoparticle Coagulation in Shear Flows

Garrick

2011

Aerosol Science and Technology

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The effects of fluid turbulence on the coagulation of aerosols are studied quantitatively and qualitatively. Direct numerical simulation data is used to isolate the effect of the small or subgrid-scale (SGS) particle-particle interactions on nanoparticle coagulation in three-dimensional flows. The rate of particle growth is decomposed into the contribution of the large-scales and small-scales interactions. The contribution of the small-scale interactions is presented as a function of time, space, flow dynamics, and coagulation Damköhler number. Results show that small-scale interactions act to both increase and decrease particle growth. The probability density functions (PDFs) of the SGS growth rate exhibit a negative bias, which increases with time and coagulation Damköhler number. Additionally, PDFs conditioned on the Q-criterion suggest that the contribution of the small-scale interactions primarily act to reduce particle growth in regions characterized by fluid rotation.

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“…In the present calculation, the average is taken in the plane parallel to the wall plate [25][26][27][28].…”

Section: Mathematical Formulationsmentioning

confidence: 99%

“…Recently, an improved dynamic SGS model, including subgrid turbulent stress and heat flux models, for thermally stratified flow was proposed and applied to the thermally stratified turbulent channel flows for investigating the coupled shear and buoyancy effects on turbulent heat transfer [23,24]. On account of the improvements made by the SGS models, it becomes highly tempting to use the dynamic SGS model for studying turbulent flow with scalar transfer at high Prandtl or Schmidt numbers [22,25,26].…”

Section: Introductionmentioning

confidence: 99%