# Parietal two-phase jet

Authors: SAto Y. , Hishida K. and Maeda M.

Type: Experimental

Status:

Description

## Description

The studied flow is a vertical plane air jet laden with glass particles going down a plane wall.This configuration was one of the reference test-case at the 8th Workshop on two-phase flow predictions organised in Merseburg on March 1996, the reference can be found in [1]. The subject of this experiment is the interaction between the particle cloud convected by the flow and the turbulence of the latter. The goal of this study is to evaluate the change of the carrier phase flow by the dispersed phase and to compare the averaged velocities profiles, the velocity fluctuations and the particles density probability function with the experimental results.

The geometry is showed on figure 1. The main flow is a plan jet of width b at the injection, which is developing along a vertical plan wall. This jet is laden with solid glass particles and is mixing with a concurrent flow. The whole system is two-dimensional.The experiment is divided in two steps. Firstly an one-phase air flow, then a particle laden flow. The characteristics of these flows were measured downstream the inlet at the points x/b = 1, 5, 10, 20, 30, 40 et 50.

## Flow Parameters

• dynamic viscosity : %$\mu = 1.6 \times 10^{-5} kg.m^{-1}.s^{-1}$%
• density : %$\rho = 1.17861 kg.m^{-3}$%
• specific heat capacity : %$Cp = 1017.24 J.K^{-1}.kg^{-1}$%
• maximal inlet jet velocity : %$10 m.s^{-1}$%
• cocurrent flow velocity : %$2 m.s^{-1}$%
• Reynolds number (of the jet) : %$Re = 3300$%

Figure 1 - Test geometry

### Domain characteristics

• section width : %$150 mm$%
• section height : %$350 mm$%
• jet width : %$b = 5 mm$%

### Particles parameters

• average diameter : %$d_p = 49.3 \mu m$%
• diameter standard deviation : %$\tau_p = 4.85 \mu m$%
• density : %$\rho_p = 2590 kg.m^{-3}$%
• mass particle loading : %$\O = 0.1$%

### Inlet conditions

Table 1 shows the cloud particle injection characteristics, given by experimental measurements of velocity components %$u_p=(u_p,v_p,w_p)$% and the volume presence rate.

Coordinate
%$z$%
Density probability function Velocity
%$u_p$%
Velocity
%$w_p$%
Velocity fluctuation
%$u_p '$%
Velocity fluctuation
%$w_p '$%
Shear stress
<%$u_p ' w_p '$% >
%$mm$%   %$m.s^{-1}$% %$m.s^{-1}$% %$m.s^{-1}$% %$m.s^{-1}$% %$m^{2}.s^{-2}$%
0 0.377%$\times 10^{-4}$% 5.544 0.000 0.352 0.058 0.0017
1 2.236%$\times 10^{-4}$% 8.827 0.179 0.352 0.058 0.0017
1.5 3.014%$\times 10^{-4}$% 9.068 0.206 0.275 0.056 0.0016
2.0 4.306%$\times 10^{-4}$% 9.169 0.221 0.252 0.056 0.0027
2.5 5.689%$\times 10^{-4}$% 8.923 0.220 0.367 0.060 0.0077
3.0 8.567%$\times 10^{-4}$% 8.295 0.223 0.516 0.063 0.0146
3.5 7.099%$\times 10^{-4}$% 7.151 0.206 0.657 0.058 0.0206
4.0 4.520%$\times 10^{-4}$% 6.048 0.190 0.872 0.072 0.0447
4.5 2.184%$\times 10^{-4}$% 4.785 0.195 1.080 0.091 0.0752
5.0 0.377%$\times 10^{-4}$% 5.544 0.504 0.792 0.232 0.1145

Table 1 - Inlet profiles of dispersed phase

Table 2 shows the inlet profiles of continuous phase, given by experimental values. The second component of the average velocity, %$$%, is zero on the whole wall. Coordinate %z% Average velocity %$$%
Average velocity
%%
Velocity fluctuation
%$u'$%
Velocity fluctuation
%$w'$%
Shear stress
%$<u'w'>$%
%$mm$% %$m.s^{-1}$% %$m.s^{-1}$% %$m.s^{-1}$% %$m.s^{-1}$% %$m^{2}.s^{-2}$%
0.8 8.568 0.290 0.733 0.168 0.0084
1.0 9.069 0.290 0.640 0.171 0.0048
1.2 9.521 0.324 0.455 0.139 -0.0037
1.4 9.828 0.337 0.271 0.125 0.0017
1.6 9.850 0.345 0.211 0.122 0.0045
1.8 9.953 0.353 0.179 0.121 0.0043
2.0 9.944 0.361 0.170 0.119 0.0049
2.2 9.990 0.371 0.166 0.118 0.0043
2.4 9.958 0.365 0.189 0.120 0.0058
2.6 9.906 0.360 0.207 0.118 0.0077
2.8 9.798 0.355 0.254 0.21 0.0096
3.0 9.622 0.349 0.329 0.115 0.0131
3.2 9.494 0.349 0.402 0.136 0.0151
3.4 9.119 0.348 0.512 0.143 0.0199
3.6 8.578 0.328 0.531 0.143 0.0240
3.8 7.896 0.310 0.579 0.142 0.0244
4.0 7.081 0.278 0.592 0.156 0.0224
4.2 5.973 0.237 0.532 0.149 0.0307
4.4 4.821 0.179 0.513 0.159 0.0224
4.6 3.639 0.150 0.418 0.142 0.0167
4.8 2.001 0.069 0.296 0.174 0.0286
5.0 1.136 -0.034 0.180 0.146 0.0191
5.2 0.821 -0.024 0.140 0.116 0.0098
5.4 0.723 -0.053 0.169 0.149 0.0164
5.6 0.736 -0.063 0.162 0.136 0.0127
5.8 0.860 -0.077 0.189 0.143 0.0144
6.0 1.037 -0.086 0.184 0.142 0.0160
6.2 1.113 -0.095 0.179 0.132 0.0139
6.5 1.309 -0.060 0.183 0.117 0.0103
7.0 1.572 -0.052 0.184 0.114 0.0079
7.5 1.711 -0.054 0.169 0.107 0.0078
8.0 1.799 -0.066 0.162 0.114 0.0103
8.5 1.882 -0.045 0.137 0.097 0.0074
9.0 1.920 -0.048 0.145 0.112 0.0110
9.5 1.948 -0.054 0.131 0.111 0.0103
10.0 1.954 -0.056 0.142 0.130 0.0139
11.0 1.995 -0.046 0.136 0.124 0.0126
16.5 2.020 -0.037 0.147 0.140 0.0170
21.0 2.011 -0.041 0.141 0.140 0.0163
31.0 1.995 -0.031 0.151 0.155 0.0203

Table 2 - Inlet profiles of continuous phase

## Reference Publications

[1] Sato Y., Hishida K. and Maeda M., Effect of Dispersed Phase on Modification of Turbulent Flow in a Wall Jet, J. Fluids Eng., Vol. 11, pp 307-314 1996.

## Results

Simulation results available for this case:
Code Version Author Restrictions
Code_Saturne 2.0-beta2 M. Guillaud AccessEDFGroup
Number of topics: 1

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Topic revision: r84 - 2017-05-19 - 03:30:55 - AllenZhang
CfdTm Web
23 Aug 2019

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