# tortuosity_fd#

tortuosity_fd(im, axis, solver=None)[source]#

Calculates the tortuosity of image in the specified direction.

Parameters:
• im (ndarray) – The binary image to analyze with True indicating phase of interest

• axis (int) – The axis along which to apply boundary conditions

Returns:

results – The following values are computed and returned as attributes:

Attribute

Description

tortuosity

Calculated using the effective_porosity as $$\tau = \frac{D_{AB}}{D_{eff}} \cdot \varepsilon$$.

effective_porosity

Porosity of the image after applying trim_nonpercolating_paths. This removes disconnected voxels which cause singular matrices.

original_porosity

Porosity of the as-received the image

formation_factor

Found as $$D_{AB}/D_{eff}$$.

concentration

An image containing the concentration values from the simulation.

Return type:

Results object

Examples