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van Hinsberg, MAT; Thije Boonkkamp, JHM; Toschi, F; Clercx, HJH
SIAM journal on scientific computing, 01/2012, Letnik: 34, Številka: 4Journal Article
In this paper a general theory for interpolation methods on a rectangular grid is introduced. By the use of this theory an efficient B-spline-based interpolation method for spectral codes is presented. The theory links the order of the interpolation method with its spectral properties. In this way many properties like order of continuity, order of convergence, and magnitude of errors can be explained. Furthermore, a fast implementation of the interpolation methods is given. We show that the B-spline-based interpolation method has several advantages compared to other methods. First, the order of continuity of the interpolated field is higher than for other methods. Second, only one FFT is needed, whereas, for example, Hermite interpolation needs multiple FFTs for computing the derivatives. Third, the interpolation error almost matches that of Hermite interpolation, a property not reached by other methods investigated.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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