scholarly journals Simultaneous Approximation Terms for Multidimensional Summation-by-parts Operators

2016 ◽  
Author(s):  
Jason E. Hicken ◽  
David C. Del Rey Fernández ◽  
David W. Zingg
Keyword(s):  
Simultaneous Approximation ◽  
Summation By Parts ◽  
Simultaneous Approximation Terms

scholarly journals Simultaneous Approximation Terms for Multi-dimensional Summation-by-Parts Operators

2017 ◽  
Vol 75 (1) ◽  
pp. 83-110 ◽  
Author(s):  
David C. Del Rey Fernández ◽  
Jason E. Hicken ◽  
David W. Zingg
Keyword(s):  
Simultaneous Approximation ◽  
Summation By Parts ◽  
Simultaneous Approximation Terms

scholarly journals A Low Dissipative and Stable Cell-Centered Finite Volume Method with the Simultaneous Approximation Term for Compressible Turbulent Flows

Mathematics ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 1206
Author(s):  
Myeongseok Kang ◽  
Donghyun You
Keyword(s):  
Boundary Condition ◽  
Finite Volume Method ◽  
Finite Volume ◽  
Simultaneous Approximation ◽  
Summation By Parts ◽  
Eddy Simulation ◽  
Characteristic Boundary ◽  
Simultaneous Approximation Term ◽  
Characteristic Boundary Condition ◽  
Volume Method

A simultaneous-approximation term is a non-reflecting boundary condition that is usually accompanied by summation-by-parts schemes for provable time stability. While a high-order convective flux based on reconstruction is often employed in a finite-volume method for compressible turbulent flow, finite-volume methods with the summation-by-parts property involve either equally weighted averaging or the second-order central flux for convective fluxes. In the present study, a cell-centered finite-volume method for compressible Naiver–Stokes equations was developed by combining a simultaneous-approximation term based on extrapolation and a low-dissipative discretization method without the summation-by-parts property. Direct numerical simulations and a large eddy simulation show that the resultant combination leads to comparable non-reflecting performance to that of the summation-by-parts scheme combined with the simultaneous-approximation term reported in the literature. Furthermore, a characteristic boundary condition was implemented for the present method, and its performance was compared with that of the simultaneous-approximation term for a direct numerical simulation and a large eddy simulation to show that the simultaneous-approximation term better maintained the average target pressure at the compressible flow outlet, which is useful for turbomachinery and aerodynamic applications, while the characteristic boundary condition better preserved the flow field near the outlet.

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