Gyroscopic polynomials
Gyroscopic polynomials
复制标题
陀螺仪多项式
DOI:
10.1016/j.jcp.2023.112268
复制
发表时间:
2023
影响因子:
4.1
通讯作者:
Julien, Keith
中科院分区:
文献类型:
--
作者:
Ellison, Abram C.;Julien, Keith
Gyroscopic alignment gives rise to highly spatially anisotropic columnar structures that in combination with complex domain boundaries pose challenges for efficient numerical discretizations and computations. We define gyroscopic polynomials to be three-dimensional polynomials expressed in a coordinate system that conforms to rotational alignment. We remap the original domain with radius-dependent boundaries onto a right cylindrical or annular domain to create the computational domain in this coordinate system. We find the volume element expressed in gyroscopic coordinates leads naturally to a hierarchy of orthonormal bases. We build the bases out of Jacobi polynomials in the vertical and generalized Jacobi polynomials in the radial. Because these coordinates explicitly conform to flow structures found in rapidly rotating systems the bases represent fields with a relatively small number of modes. We develop the operator structure for one-dimensional semi-classical orthogonal polynomials as a building block for differential operators in the full three-dimensional cylindrical and annular domains. The differentiation operators of generalized Jacobi polynomials generate a sparse linear system for discretization of differential operators acting on the gyroscopic bases. This enables efficient simulation of systems with strong gyroscopic alignment.
登录
查看更多内容
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:
4.1
作者:
Ellison, Abram C.;Julien, Keith;Vasil, Geoffrey M.
通讯作者:
Vasil, Geoffrey M.
DOI:
--
发表时间:
2018
期刊:
影响因子:
--
作者:
S. Olver;Alex Townsend;G. Vasil
通讯作者:
G. Vasil
影响因子:
--
作者:
Ben Snowball;S. Olver
通讯作者:
S. Olver
影响因子:
64.8
作者:
SOMMERIA, J;MEYERS, SD;SWINNEY, HL
通讯作者:
SWINNEY, HL