Numerical investigations of the coupled DEM-LBM technique with application to leakage-soil interaction due to a leaking pipe

Li, Jun (2013). Numerical investigations of the coupled DEM-LBM technique with application to leakage-soil interaction due to a leaking pipe. University of Birmingham. Ph.D.

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Abstract

This thesis is motivated by developing a numerical tool, FPS-BHAM, in exploring the large-scale fluid-particle system with local interaction behaviours being captured. A blocked partitioning domain decomposition strategy with the philosophies of parallel computing and combination with a large-scale modelling technique is proposed in this thesis.

The illustration of detailed implementation of DEM-LBM, with its verification in FPS-BHAM and its validation using a pipe leakage problem, are subsequently conducted. A good parallel behaviour is achieved by applying the blocked partitioning domain decomposition strategy, which is proposed in this thesis. The DEM-DFF technique is also successfully implemented in FPS-BHAM as well. Furthermore, a combination strategy between DEM-LBM and DEM-DFF is proposed in this thesis. A good computational benefit is found to be achieved by adopting the proposed combination strategy. Finally, different behaviours between LBM and DFF during the dynamic propagation to the steady state are investigated by parametric studies.

Type of Work:

Thesis (Doctorates > Ph.D.)

Award Type:

Doctorates > Ph.D.

Supervisor(s):