PARTICLE-LADEN FLOW - ERCOFTAC SERIES Phần 2 docx
PARTICLE-LADEN FLOW - ERCOFTAC SERIES Phần 2 docx
... 11.8
180
20 0
22 0
24 0
26 0
SOLVE ER 2 campaign 27 /01 /20 00
N
2
O (ppbv)
(a)
10.6 11 11.4 11.8
180
20 0
22 0
24 0
26 0
recons. D=1 m
2
s
−1
(b)
10.6 11 11.4 11.8
180
20 0
22 0
24 0
26 0
recons. D=10
−1
m
2
s
−1
(c)
10.6 ... 11.4 11.8
180
20 0
22 0
24 0
26 0
recons. D=10
2
m
2
s
−1
(d)
13 .2 13.6 14 14.4
80
100
120
140
160
SOLVE ER 2 campaign 27 /01 /20...
PARTICLE-LADEN FLOW - ERCOFTAC SERIES Phần 9 docx
... turbulent-like flows 367
0 5 10 15 20 25 30
0
50
100
150
20 0
25 0
300
350
t/τ
k
Nc/sec
St~0.14
St~0.91
St ~2. 29
St~9.17
Fig. 2. Effects of St on the encounter (collision) rates.
0 5 10 15 20 25 30
... ESF. 623 9.
References
[1] Kiørboe, T. (1997) Scientia Marina 61:14 1-1 58.
[2] Wang, L-P. and M.R. Maxey, (1993) J. Fluid Mech. 25 6 :2 7-6 8.
[3] Fung, JCH (1990) Kinematic S...
PARTICLE-LADEN FLOW - ERCOFTAC SERIES Phần 1 pps
... 20 0
−5
0
5
10
15
20
25
30
FA5010
−50 25 0 25 50
−5
0
5
10
15
20
25
30
FA5010
20 0 −100 0 100 20 0
−5
0
5
10
15
20
25
30
MA5010
z (mm)
sand flux (mm/s)
20 0 −100 0 100 20 0
−5
0
5
10
15
20
25
30
MA5010
sand ... ‘on-shore’, maximum ‘offshore’ and total mean flux profiles for two
grain sizes, i.e., 0 .28 (MA5010) and 0.15 mm (FA5010).
20 0 −100 0 100 20 0
−5
0
5
10
15
20
25...
PARTICLE-LADEN FLOW - ERCOFTAC SERIES Phần 3 ppsx
... 1000
= 0
= 1
= 10
= 100
= 1000
2
10
-2
10
-1
10
0
10
1
t - t
0
2
Ω
2
Ω
2
Ω
2
Ω
2
Ω
2
Ω
2
Ω
2
Ω
2
Ω
2
Ω
2
Ω
2
Ω
2
Ω
2
Ω
2
Ω
2
Ω
2
Ω
2
Ω
2
Ω
2
Ω
Fig. 2. Single Particle Dispersion in horizontal ... Herring
N
2
= 1
= 0
= 1
= 10
= 100
= 1000
2
10
-2
10
-1
10
0
10
1
10
-4
10
-3
10
-2
10
-1
10
0
10
1
t -...
PARTICLE-LADEN FLOW - ERCOFTAC SERIES Phần 4 potx
... 145
x
z
0 4 8 12 16 20 24 28 32
-0 .5
-0 .25
0
0 .25
0.5
(a) γ =0. 92
x
z
0 4 8 12 16 20 24 28 32
-0 .5
-0 .25
0
0 .25
0.5
(b) γ =0.7
x
z
0 4 8 12 16 20 24 28 32
-0 .5
-0 .25
0
0 .25
0.5
(c) γ =0 .2
Fig. 3. ... turbulence 125
-0 .1
0
0.1
0 .2
0.3
0.4
〈ω
1
3
〉/〈ω
3
2
〉
3 /2
C1
C2
C3
C4
-0 .1
0
0.1
0 .2
0.3
0.4
〈ω
1
ω
3
2
〉/〈ω
3
2...
PARTICLE-LADEN FLOW - ERCOFTAC SERIES Phần 5 pptx
... two-fluid equations of the
dispersed-phase, results in:
∇·(α
2
U
2
)=0 (1)
for the average mass balance and:
∇·(α
2
U
2
U
2
)=−∇ ·
α
2
u
2
u
2
−
α
2
τ
2
U
rel
(2)
for the momentum-balance. ... Berlin.
[26 ] Minier J-P., Peirano E., Chibarro S. (20 03) Monte Carlo Methods and
Appl., Vol.9, No. 2, pp. 9 3-1 33.
[27 ] Maclnnes J. M., Bracco F. V. (19 92)...
PARTICLE-LADEN FLOW - ERCOFTAC SERIES Phần 6 ppt
... J
0
=4πR
2
K(R)dn(r)/dr|
r=R
,inthe
negative r-direction, towards the spherical surface. In normalized units:
22 4 Guido Boffetta
10
4
10
2
10
0
10
-2
10
-4
10
-6
10
2
10
1
10
0
10
-1
S
p
(τ)
τ/τ
η
3
2
1
10
2
10
1
10
0
Fig. ... turbulence 22 7
1
10
-2
10
-4
10
-6
10
-8
0 5 10 15 20 25 30 35 40
P(a)a
rms
a/a
rms
Fig. 4. Acceleration pdf in lin-log...
PARTICLE-LADEN FLOW - ERCOFTAC SERIES Phần 7 potx
... 8.
100 120 160 20 0 24 0 300
1
2
3
4
6
8
10
∆/η
(1/s
2
), ( − )
100 120 160 20 0 24 0 300
10
20
30
50
70
100
∆/η
(1/s
2
), ( − )
s
2
[1/s
2
]
ω
2
[1/s
2
]
s
2
⋅t
2
*
ω
2
⋅t
2
*
s
2
[1/s
2
]
ω
2
[1/s
2
]
s
2
⋅t
2
*
ω
2
⋅t
2
*
r
−4/3
r
−4/3
a)
b)
> 12 ... near-isotropic turbulence Phys. Fluids, 15(4), 86 0-8 80.
28 0 M. Guala et al.
0 500 1000...
PARTICLE-LADEN FLOW - ERCOFTAC SERIES Phần 8 pot
... 25 δ
S
.
0
500
1000
1500
x
-2 5
0
25
50
y
0
10
20
30
40
z
a)
0
500
1000
1500
x
-2 5
0
25
y
0
10
20
30
40
z
b)
Fig. 2. Trajectories of particles along an oscillatory cycle, released at a fixed ho-
rizontal ... the
−6 −4 2 0 2 4 6
10
−6
10
−4
10
2
10
0
u / <u
2
>
1 /2
Probability Density
(a)
−6 −4 2 0 2 4 6
10
−6
10
−4
10
2
10
0
u / <u
2
>
1 /2
Probabi...
PARTICLE-LADEN FLOW - ERCOFTAC SERIES Phần 10 ppt
... Large-Eddy Simulation,
held at the Munich University of Technology, August 27 29 , 20 03. 20 04
ISBN 1-4 02 0 -2 03 2- 5
10. E. Lamballais, R. Friedrich, B.J. Geurts and O. Métais (eds.): Direct and Large-Eddy ... quality and emissions through 20 03. EPA-454-R-0 4-0 02. US Envir-
onmental Protection Agency
[22 ] Wiscombe WJ (1980) Improved Mie scattering algorithms. Appl Opt 19:...
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