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Communication Dans Un Congrès Année : 2011

A volume penalization method for incompressible flows and scalar advection-diffusion with moving obstacles

Résumé

A volume penalization method for imposing homogeneous Neumann boundary conditions in advection-diffusion equations is presented. Thus complex geometries which even may vary in time can be treated efficiently using discretizations on a Cartesian grid. A mathematical analysis of the method is conducted first for the one-dimensional heat equation which yields estimates of the penalization error. The results are then confirmed numerically in one and two space dimensions. Simulations of two-dimensional incompressible flows with passive scalars using a classical Fourier pseudo-spectral method validate the approach for moving obstacles. The potential of the method for real world applications is illustrated by simulating a simplified dynamical mixer where for the fluid flow and the scalar transport no-slip and no-flux boundary conditions are imposed, respectively.

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hal-01307209 , version 1 (26-04-2016)

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Kaï Schneider, Benjamin Kadoch, Dmitry Kolomenskiy, Philippe Angot. A volume penalization method for incompressible flows and scalar advection-diffusion with moving obstacles. 64th Annual Conference, Division of Fluid Dynamics, American Physical Society, Nov 2011, Baltimore, United States. ⟨10.1016/j.jcp.2012.01.036⟩. ⟨hal-01307209⟩
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