A computational framework with an adaptive mesh refinement technique for concentrated suspension flows. (2nd October 2020)

• Record Type: Journal Article
• Authors: Dbouk, Talib
• Is Part Of: Particulate science and technology. Volume 38:Number 7(2020)
• Page Start: 782
• Page End: 791
• Publication Date: 2020-10-02
• Subjects: Non-colloidal suspension flows -- adaptive mesh refinement -- shear-induced migration -- computational fluid dynamics (CFD); Particles -- Periodicals; 620.43
• DOI: 10.1080/02726351.2019.1624663
• Languages: English
• ISSNs: 0272-6351

Abstract

Abstract: A computational framework (solver) is developed for incompressible isothermal concentrated non-colloidal suspension flows of rigid particles. The number of particles can be of the order of millions. The developed solver, named "SuspensionFoam" can predict the phenomenon of shear-induced migration in complex geometries in a continuum mechanics modeling approach. It employs the C++ object-oriented OpenFOAM library features including adaptive mesh refinement (AMR), dynamic mesh rotation in both 2D and 3D, adaptive time steps, multi-CPU parallel-run over MPI (and open MPI) and run-time selection of different liquid and particles properties (i.e. diameter, maximum packing). Three different numerical examples have been conducted by simulating isodense suspension flow in a vertical Couette cell, non-isodense resuspension and mixing of particles in a horizontal Couette cell, and isodense suspension flow in a conduit. The present AMR technique is found to reduce the computational process considerably, with a good accuracy. Numerical results are presented and discussed, with comparisons to experimental data.