The Role of Continuity in Residual-Based Variational Multiscale Modeling of Turbulence
نویسنده
چکیده
This paper examines the role of continuity of the basis in the computation of turbulent flows. We compare standard finite elements and NURBS (non-uniform rational B-splines) discretizations that are employed in Isogeometric Analysis [23]. We make use of quadratic discretizations that are C-continuous across element boundaries in standard finite elements, and C-continuous in the case of NURBS. The variational multiscale residual-based method [2, 4, 12, 22, 38] is employed as a turbulence modeling technique. We find that Ccontinuous discretizations outperform their C-continuous counterparts on a per-degreeof-freedom basis. We also find that the effect of continuity is greater for higher Reynolds number flows.
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