Research Calculation Study of a Slurry Circulation System based on the CFD-DEM Method

Yuhua Wang; Liying Deng

doi:10.6919/ICJE.202512_11(12).0001

Authors

Yuhua Wang
Liying Deng

DOI:

https://doi.org/10.6919/ICJE.202512_11(12).0001

Keywords:

Slurry Circulation System; CFD-DEM; Pressure Loss; Pump Arrangement; Particle Transport.

Abstract

The slurry circulation system is a key link in the construction of slurry balance shield to ensure the stability of tunneling and the smooth transportation of muck. Its design parameters and flow patterns are directly related to construction safety and efficiency. Based on a certain intercity rail transit project in Guangzhou, this paper theoretically calculates the key parameters of the slurry circulation system during the construction process and conducts numerical simulation using the CFD-DEM method. The results show that the pressure loss along the straight pipe section and the local resistance of the curved pipe can be obtained through simulation, and the total system head calculated based on this is basically consistent with the pump layout on site. Further flow field analysis indicated that there was a large velocity gradient near the wall of the straight pipe, while secondary flow and local vortices occurred inside the elbow; There are obvious stratified movement characteristics during the particle transport process, and the wall area of the elbow is prone to accumulation and frequent collisions, which may induce local wear and even blockage.

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