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Algebraically stable SDIRK methods with controllable numerical dissipation for first/second-order time-dependent problems
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DOI：10.1016/j.jcp.2024.113032.png)
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摘要
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In this paper, a family of four-stage singly diagonally implicit Runge -Kutta methods are proposed to solve first-/second-order time -dependent problems, exhibiting the following numerical properties: fourth-order accuracy in time, unconditional stability, controllable numerical dissipation, and adaptive time step selection. The BN-stability condition is employed as a constraint to optimize parameters in the Butcher table, having significant benefits, and hence recommended for nonlinear dynamics problems in contrast to existing methods. Numerical examples involving both first- and second-order linear/nonlinear dynamics problems validate the proposed method, and numerical results reveal that the proposed methods are free from the order reduction phenomenon when applied to nonlinear dynamics problems. The performance of adaptive time -stepping using the embedded scheme is further illustrated by the phase-field modeling problem. Additionally, the advantages and disadvantages of three-stage third-order accurate algebraically stable methods are discussed. The proposed high -order time integration can be readily integrated into high -order spatial discretization methods, such as the high -order spectral element method employed in this paper, to obtain high -order discretization in space and time dimensions.
Keyword:
Time discretization
Singly diagonally implicit Runge-Kutta
Stability analysis
Nonlinear stability
Numerical dissipation and dispersion
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3.8
论文数:
1.6W
被引数:
7.4W
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