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Ghost-point based radial basis function collocation methods with variable shape parameters
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DOI：10.1016/j.enganabound.2021.05.006.png)
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摘要
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In this study, a strategy was proposed to determine the interval of the variable shape parameter for the ghost point method using radial basis functions. The determination of a suitable interval for the variable shape parameter remains a challenge. The modified Franke formula was used as an initial predictor of the center of the interval of the variable shape parameter in this study. After extensive tests, a numerical procedure was found for the determination of a suitable interval. The improvement from the imposition of the partial differential equation on the boundary points using the ghost point method was also investigated. To demonstrate the effectiveness of the proposed approach, four numerical examples are presented, including second and fourth order partial differential equations in 2D and 3D.
Keyword:
Radial basis functions
Shape parameter
Franke's formula
Multiquadrics
Ghost point method
Kansa method
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