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- W1844763955 abstract "The unsteady compressible flow equations are solved using a stabilized finite-element formulation with C0 elements. In 2D, the performance of three-noded linear and six-noded quadratic triangular elements is compared. In 3D, the relative performance is evaluated for 6-noded linear and 18-noded quadratic wedge elements. Results are compared for the solutions to Euler, laminar, and turbulent flows at different Mach numbers for several flow problems. The finite-element meshes considered for comparison have same location of nodes for the linear and quadratic interpolations. For the turbulent flow, the Spalart–Allmaras model is used for closure. It is found that the quadratic elements yield better performance than the linear elements. This is attributed to accurate representation of the stabilization terms that involve second-order derivatives in the formulation. When these terms are dropped from the formulation with quadratic interpolation, the numerical results are similar to those obtained with linear interpolation. The absence of these terms result in added numerical diffusion that seems to give the effect of a relatively reduced Reynolds number. For the same location of nodes, the computations with the linear triangular and wedge elements are approximately 20% and 100% faster than those with quadratic triangular and wedge elements, respectively. However, if the same quadrature rule for numerical integration is used for both interpolations, the computations with quadratic elements are approximately 20% and 45% faster in 2D and 3D, respectively. Copyright © 2014 John Wiley & Sons, Ltd." @default.
- W1844763955 created "2016-06-24" @default.
- W1844763955 creator A5000319816 @default.
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- W1844763955 date "2014-02-26" @default.
- W1844763955 modified "2023-09-26" @default.
- W1844763955 title "Stabilized finite-element computation of compressible flow with linear and quadratic interpolation functions" @default.
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- W1844763955 doi "https://doi.org/10.1002/fld.3894" @default.
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