A gyroscopic polynomial basis in the sphere
A gyroscopic polynomial basis in the sphere
复制标题
球体中的陀螺多项式基
DOI:
10.1016/j.jcp.2022.111170
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发表时间:
2022
影响因子:
4.1
通讯作者:
Vasil, Geoffrey M.
中科院分区:
文献类型:
--
作者:
Ellison, Abram C.;Julien, Keith;Vasil, Geoffrey M.
Standard spectral codes for full sphere dynamics utilize a combination of spherical harmonics and a suitable radial basis to represent fluid variables. These basis functions have a rotational invariance not present in geophysical flows. Gyroscopic alignment - alignment of dynamics along the axis of rotation - is a hallmark of geophysical fluids in the rapidly rotating regime. The Taylor-Proudman theorem, resulting from a dominant balance of the Coriolis force and the pressure gradient force, yields nearly invariant flows along this axial direction. In this paper we tailor a coordinate system to the cylindrical structures found in rotating spherical flows. This “spherindrical” coordinate system yields a natural hierarchy of basis functions, composed of Jacobi polynomials in the radial and vertical direction, regular throughout the ball. We expand fluid variables using this basis and utilize sparse Jacobi polynomial algebra to implement all operators relevant for partial differential equations in the spherical setting. We demonstrate the representation power of the basis in three eigenvalue problems for rotating fluids.
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DOI:
10.1007/978-3-030-39647-3_5
发表时间:
2018
期刊:
Lecture Notes in Computational Science and Engineering
影响因子:
--
作者:
S. Olver;Alex Townsend;Geoff Vasil
通讯作者:
Geoff Vasil
DOI:
10.1137/19m1245888
发表时间:
2019-01
期刊:
SIAM J. Sci. Comput.
影响因子:
--
作者:
S. Olver;Alex Townsend;G. Vasil
通讯作者:
S. Olver;Alex Townsend;G. Vasil
影响因子:
3
作者:
S. Olver;Yuan Xu
通讯作者:
Yuan Xu
影响因子:
2.1
作者:
S. Olver;Yuan Xu
通讯作者:
Yuan Xu
DOI:
--
发表时间:
2004
期刊:
Sugaku Expositions, AMS 17
影响因子:
--
作者:
Jinjoo Kim;Kanta Mitsuhashi;Katsuhiro Sakurai;Yoshiro Higano;I.Nakamura
通讯作者:
I.Nakamura