Hernandez, Franz H.; Rangel, Roger H. Breakup of drops in simple shear flows with high-confinement geometry. (English) Zbl 1390.76441 Comput. Fluids 146, 23-41 (2017). Summary: The problem of a drop subject to a simple shear flow in high constriction geometry is addressed numerically for different flow conditions. Wall effect on the critical capillary number and drop deformation is analyzed. Under uniform condition, drops in low and moderate Reynolds flows are more stable when the confinement is increased. The critical capillary number is shown to increase for drops more viscous than the medium (viscosity ratio \(\lambda = 0.3\)) and decreases when the medium is more viscous (\(\lambda = 1.9\)) or when Reynolds number is increased. A discussion on the accuracy of the numerical method and solutions to typical problems are included for comparison. The drop interface is reconstructed using the piecewise linear interface calculation (PLIC) and transported with the volume-of-fluid (VOF) method, which follows unsplit case-by-case schemes based on the basic donating region (BDR) or the defined donating region (DDR). Surface tension is included with the continuum-surface-force (CSF) model. A high-resolution (SMART) semi-implicit finite-volume discretization is employed in the linear momentum equations. Mass is conserved by following an implicit pressure-correction method (SIMPLEC). The normal vector of the interface is computed from height functions using least squares fitting. The advantage of the DDR scheme lies in its volume-conserving capabilities which have not been exploited in recent investigations. MSC: 76M12 Finite volume methods applied to problems in fluid mechanics 65M08 Finite volume methods for initial value and initial-boundary value problems involving PDEs 76D45 Capillarity (surface tension) for incompressible viscous fluids 76E05 Parallel shear flows in hydrodynamic stability Keywords:volume-of-fluid; PLIC; drop deformation; simple-shear flow; inertia; breakup Software:PROST PDFBibTeX XMLCite \textit{F. H. Hernandez} and \textit{R. H. Rangel}, Comput. Fluids 146, 23--41 (2017; Zbl 1390.76441) Full Text: DOI Link References: [1] Anderson, J. D., Computational fluid dynamics : the basics with applications, (1994), McGraw-Hill New York [2] Ashgriz, N.; Poo, J., Flair: flux line-segment model for advection and interface reconstruction, J Comput Phys, 93, 449-468, (1991) · Zbl 0739.76012 [3] Basaran, O. A., Nonlinear oscillations of viscous liquid drops, J Fluid Mech, 241, 169-198, (1992) · Zbl 0775.76032 [4] Brackbill, J. U.; Kothe, D. 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