fluidimage.postproc.util#

Utilities for post-processing (`fluidimage.postproc.util`)#

fluidimage.postproc.util.get_grid_from_ivecs_final(x_flat, y_flat)[source]#: Get a 2d grid from flat arrays

fluidimage.postproc.util.reshape_on_grid_final(x_flat, y_flat, deltaxs, deltays)[source]#: Reshape flat arrays on a 2d grid

fluidimage.postproc.util.compute_rot(dUdy, dVdx)[source]#: Compute the rotational

fluidimage.postproc.util.compute_div(dUdx, dVdy)[source]#: Compute the divergence

fluidimage.postproc.util.compute_1dspectrum(x, signal, axis=0)[source]#

Computes the 1D Fourier Transform

Parameters:

x: 1D np.ndarray
signal: np.ndarray
axis: int: Direction of the Fourier transform

Returns:

signal_fft: np.ndarray: fourier transform
omega: np.ndarray: puslation (in rad/s if x in s)
psd: np.ndarray: power spectral density normalized such that np.sum(signal**2) * dx / Lx = np.sum(psd) * domega

fluidimage.postproc.util.compute_2dspectrum(X, Y, signal, axes=(1, 2))[source]#

Computes the 2D Fourier Transform

INPUT: X: 2D np.array Y: 2D np.array signal: np.array to Fourier transform axis: directions of the fourier transform

OUTPUT: signal_fft = fourier transform kx: puslation (in rad/m if X in m) ky: pulsation (in rad/m if Y in m) psd: power spectral density normalized such that np.sum(signal**2) * dx / Lx = np.sum(psd) * domega

Functions

`compute_1dspectrum`(x, signal[, axis])	Computes the 1D Fourier Transform
`compute_2dspectrum`(X, Y, signal[, axes])	Computes the 2D Fourier Transform
`compute_div`(dUdx, dVdy)	Compute the divergence
`compute_rot`(dUdy, dVdx)	Compute the rotational
`get_grid_from_ivecs_final`(x_flat, y_flat)	Get a 2d grid from flat arrays
`reshape_on_grid_final`(x_flat, y_flat, ...)	Reshape flat arrays on a 2d grid

fluidimage.postproc.util#

Utilities for post-processing (fluidimage.postproc.util)#

Utilities for post-processing (`fluidimage.postproc.util`)#