Application of parallel distributed Lagrange multiplier technique to simulate coupled Fluid-Granular flows in pipes with varying Cross-Sectional area

Journal Article · Mon Nov 30 00:00:00 EST 2015 · Powder Technology

DOI:https://doi.org/10.1016/j.powtec.2015.11.062· OSTI ID:1440716

Kanarska, Yuliya ^[1]; Walton, Otis ^[1]

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1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Fluid-granular flows are common phenomena in nature and industry. Here, an efficient computational technique based on the distributed Lagrange multiplier method is utilized to simulate complex fluid-granular flows. Each particle is explicitly resolved on an Eulerian grid as a separate domain, using solid volume fractions. The fluid equations are solved through the entire computational domain, however, Lagrange multiplier constrains are applied inside the particle domain such that the fluid within any volume associated with a solid particle moves as an incompressible rigid body. The particle–particle interactions are implemented using explicit force-displacement interactions for frictional inelastic particles similar to the DEM method with some modifications using the volume of an overlapping region as an input to the contact forces. Here, a parallel implementation of the method is based on the SAMRAI (Structured Adaptive Mesh Refinement Application Infrastructure) library.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• Grant/Contract Number: AC52-07NA27344
• OSTI ID: 1440716
• Alternate ID(s): OSTI ID: 1396773
• Report Number(s): LLNL-JRNL-576915; 650114
• Journal Information: Powder Technology, Vol. 291, Issue C; ISSN 0032-5910
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
Fluid-granular flows
Pneumatic conveying
Lagrange multiplier