# tortuosity¶

tortuosity(im, axis)[source]

Calculate 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:

• 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 objects