**5. Conclusions**

392 Computational Simulations and Applications

Actually, the experimental solid velocity in selected pipe section concentrates a point

Fig 12 gives the contrast of experiment data and simulation result for solid velocity in the selected pipe section under a stationary pressure. From the figure, we can conclude that the simulation data is approximately equal to the average value of experiment value. So,

Similar to the solid velocity distribution, the experimental value of pressure drop is to be

Experiment data Simuation data

127.7 127.9 128.1 128.3 128.5 128.7 Distance along pipe(m)

1 1.2 1.4 1.6 1.8 2 Experiment data(kPa/m)

Fig. 13. Relationship of pressure drop between simulated and experimental value.

Fig. 14. Relationship between experiment data and simulation result.

numerical simulation can be used to predict the gas solid flow parameter precisely.

**4.5.2 Comparison of solid velocity** 

**4.5.3 Comparison of pressure drop** 

regarded as the average value along the pipe.

0.9

1

1.2

1.4

Simulation result(kPa/m)

1.6

1.8

2

1

1.1

Pressure drop(kPa/m)

1.2

1.3

1.4

velocity which stands for the average velocity in this segment.

In this paper, dense phase pneumatic conveying is carried out. The trend of flow characteristic along the pipe is given in different cases. And based the experimental results, the k-ε-kp-εp two-fluid model was established with the consideration of gas-solid turbulent flow and taking into account the issue of gas-solid two-way coupling. Numerical simulation of fly ash flow for dense-phase pneumatic conveying was carried out by using Fluent software. The numerical simulation and experimental results were compared. The simulated conclusions are given as below.

