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A hybrid stochastic-deconvolution model for large-eddy simulation of particle-laden flow
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10.1063/1.4849536
/content/aip/journal/pof2/25/12/10.1063/1.4849536
http://aip.metastore.ingenta.com/content/aip/journal/pof2/25/12/10.1063/1.4849536
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

correlation in wall units as a function of the wall-normal coordinate in wall units for Re = 950; solid: St = 0.2, dashed: St = 0.4, dashed-dotted: St = 1, dotted: St = 2.

Image of FIG. 2.
FIG. 2.

Kolmogorov time, resolved Kolmogorov time scale in LES and Lagrangian correlation time τ in wall units as a function of the wall-normal coordinate in wall units for Re = 950; solid: Kolmogorov time, dashed-dotted: LES-ADM resolved Kolmogorov time scale, dashed: τ results and St = 1.

Image of FIG. 3.
FIG. 3.

The RMS of as a function of the wall-normal coordinate in wall units for Re = 950; dotted: St = 0.2, solid: St = 1, dashed: St = 5, dashed-dotted: St = 25, ○: St = 1 with weighting factor  (1) = 0.6.

Image of FIG. 4.
FIG. 4.

The particle concentration close to the walls as a function of time in wall units, +, for St = 1; solid: DNS, dashed-dotted: LES with ADM for particles, ○: LES with ADM and stochastic model for particles, +: LES with ADM and stochastic model with the well-mixed term with  (1) = 1.0 for particles, ×: LES with ADM and stochastic model with  (1) = 0.6 for particles.

Image of FIG. 5.
FIG. 5.

The particle concentration close to the walls as a function of time in wall units, +, for St = 4; solid: DNS, dashed-dotted: LES with ADM for particles, LES with ADM and stochastic model for particles ○: with  (4) = 0.05, ×: with  (4) = 0.15, +: with  (4) = 0.3.

Image of FIG. 6.
FIG. 6.

The optimal values of (St) (crosses) and a general trend (solid) given by (St) = exp ( − St/2). Included are also the scaled maxima of the term shown in Fig. 1 (circles).

Image of FIG. 7.
FIG. 7.

The steady-state particle concentration profile in the wall-normal direction for St = 1; solid: DNS, dashed-dotted: LES with ADM for particles, dashed: LES with ADM and stochastic model with  (1) = 0.6 for particles.

Image of FIG. 8.
FIG. 8.

The steady-state particle concentration profile in the wall-normal direction for St = 5; solid: DNS, dashed-dotted: LES with ADM for particles, dashed: LES with ADM and stochastic model with  (5) = 0.1 for particles.

Image of FIG. 9.
FIG. 9.

The mean relative wall-normal particle velocity as a function of the wall-normal coordinate in wall units for St = 1; solid: DNS, dashed-dotted: LES with ADM for particles, dashed: LES with ADM and stochastic model with  (1) = 0.6 for particles.

Image of FIG. 10.
FIG. 10.

The mean relative wall-normal particle velocity as a function of the wall-normal coordinate in wall units for St = 5; solid: DNS, dashed-dotted: LES with ADM for particles, dashed: LES with ADM and stochastic model with  (5) = 0.1 for particles.

Image of FIG. 11.
FIG. 11.

The mean relative streamwise particle velocity as a function of the wall-normal coordinate in wall units for St = 1; solid: DNS, dashed-dotted: LES with ADM for particles, dashed: LES with ADM and stochastic model with  (1) = 0.6 for particles.

Image of FIG. 12.
FIG. 12.

The RMS of the streamwise (left), wall-normal (right), and spanwise (bottom) particle velocity as a function of the wall-normal coordinate in wall units for St = 1; solid: DNS, dashed-dotted: LES with ADM for particles, dashed: LES with ADM and stochastic model with  (1) = 0.6 for particles.

Image of FIG. 13.
FIG. 13.

The RMS of the spanwise particle velocity as a function of the wall-normal coordinate in wall units for St = 5; solid: DNS, dashed-dotted: LES with ADM for particles, dashed: LES with ADM and stochastic model with  (5) = 0.1 for particles.

Image of FIG. 14.
FIG. 14.

PDF of at + = 30 (left), + = 60 (right), and + = 200 (bottom) for St = 1; solid: LES, dashed-dotted: DNS, circles: Gaussian distribution.

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/content/aip/journal/pof2/25/12/10.1063/1.4849536
2013-12-20
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A hybrid stochastic-deconvolution model for large-eddy simulation of particle-laden flow
http://aip.metastore.ingenta.com/content/aip/journal/pof2/25/12/10.1063/1.4849536
10.1063/1.4849536
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