Assessment of High-Order Upwind SBP Finite Difference Operators for Compressible Turbulent Flows

2022 ◽  
Author(s):  
Mehdi Khalloufi ◽  
Jesse Capecelatro
Keyword(s):  
Finite Difference ◽  
Turbulent Flows ◽  
High Order ◽  
Difference Operators

scholarly journals Staggered-Grid Finite Difference Method with Variable-Order Accuracy for Porous Media

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Jinghuai Gao ◽  
Yijie Zhang
Keyword(s):  
Porous Media ◽  
Finite Difference ◽  
Finite Difference Methods ◽  
Computation Time ◽  
High Order ◽  
Staggered Grid ◽  
Difference Operators ◽  
Variable Order ◽  
Low Velocity ◽  
Order Accuracy

The numerical modeling of wave field in porous media generally requires more computation time than that of acoustic or elastic media. Usually used finite difference methods adopt finite difference operators with fixed-order accuracy to calculate space derivatives for a heterogeneous medium. A finite difference scheme with variable-order accuracy for acoustic wave equation has been proposed to reduce the computation time. In this paper, we develop this scheme for wave equations in porous media based on dispersion relation with high-order staggered-grid finite difference (SFD) method. High-order finite difference operators are adopted for low-velocity regions, and low-order finite difference operators are adopted for high-velocity regions. Dispersion analysis and modeling results demonstrate that the proposed SFD method can decrease computational costs without reducing accuracy.

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