High Quality Content by WIKIPEDIA articles! Tortuosity is a property of curve being tortuous (twisted; having many turns). There have been several attempts to quantify this property. Tortuosity is commonly used to describe diffusion in porous media. This concept is also used for porous media as soils and snow. Another method, proposed in 1999, is to estimate the tortuosity as integral of square (or module) of curvature. Dividing the result by length of curve or chord has also been tried. In 2002 several Italian scientists proposed one more method. At first, the curve is divided into several (N) parts with constant sign of curvature (using hysteresis to decrease sensitivity to noise).

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