[转载] Question about Energy spectrum - 未名空间MITBBS历史存档

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[转载] Question about Energy spectrum

[转载] Question about Energy spectrum# Computation - 科学计算

v*r2003-08-14 07:08

1 楼

【以下文字转载自 ME 讨论区,原文如下】
发信人: vertexcover (的哥), 信区: ME
标题: Question about Energy spectrum
发信站: Unknown Space (Thu Aug 14 16:38:53 2003) WWW-POST
Given a cubic domain with length L in each direction. The size of the grid in
this domain is say, 128 cube. Velocity components at all grid points are
known. How to calculate the kinetic energy spectrum E(k)?
The primal confusion is how to transform the 3D space velocity field into 3D
Fourier space field. Hope to get detailed explanation...
Thanks a

t*o2003-08-14 07:08

2 楼

using FFT
it should be a standard scientific subroutine avaible at each workstation or
supercomputer

in

【在 v*********r 的大作中提到】

: 【以下文字转载自 ME 讨论区,原文如下】
: 发信人: vertexcover (的哥), 信区: ME
: 标题: Question about Energy spectrum
: 发信站: Unknown Space (Thu Aug 14 16:38:53 2003) WWW-POST
: Given a cubic domain with length L in each direction. The size of the grid in
: this domain is say, 128 cube. Velocity components at all grid points are
: known. How to calculate the kinetic energy spectrum E(k)?
: The primal confusion is how to transform the 3D space velocity field into 3D
: Fourier space field. Hope to get detailed explanation...
: Thanks a