Direct numerical simulations of isolated rigid particles; Validation of smooth profile method

Recently updated Smooth Profile Method ( SPM ) is validated for rigid particles by performing Direct Numerical Simulations for isolated regular ( prolate , disk, fiber and scalene prolate ) and irregular-shaped particles, settling in a Newtonian fluid. These non-spherical particles are generated by joining the spherical beads, which gives the added benefit to use SPM for any arbitrary rigid particle. Drag and lift coefficients are calculated for regular-shaped particles, as a function of orientation angle (0), aspect ratio (w), and Reynolds number (Re). Drag coefficients, as a function of Re and 0, are in good agreement with literature and normalized drag coefficients followed the well-known sin20 curve for all shapes. Normalized lift coefficients also showed good agreement with the literature. New correlations for fiber, disk, and scalene prolate are also suggested based on the regression of our data to calculate the drag and lift coefficients, which incorporates parametric effects of Re, 0, and w.

Automated summary

The recently updated Smooth Profile Method (SPM) is validated for rigid particles settling in a Newtonian fluid. Non-spherical particles, including regular and irregular shapes, are generated by joining spherical beads. Drag and lift coefficients are calculated for regular-shaped particles, and good agreement with literature is observed. New correlations for fiber, disk, and scalene prolate particles are suggested.