A FIC-based stabilized finite element formulation for turbulent flows

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Abstract

We present a new stabilized finite element (FEM) formulation for incompressible flows based on the Finite Increment Calculus (FIC) framework (Oñate, 1998). In comparison to existing FIC approaches for fluids, this formulation involves a new term in the momentum equation, which introduces non-isotropic dissipation in the direction of velocity gradients. We also follow a new approach to the derivation of the stabilized mass equation, inspired by recent developments for quasi-incompressible flows (Oñate et al., 2014). The presented FIC-FEM formulation is used to simulate turbulent flows, using the dissipation introduced by the method to account for turbulent dissipation in the style of implicit large eddy simulation.

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Cotela-Dalmau, J., Rossi, R., & Oñate, E. (2017). A FIC-based stabilized finite element formulation for turbulent flows. Computer Methods in Applied Mechanics and Engineering, 315, 607–631. https://doi.org/10.1016/j.cma.2016.11.020

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