SUBJECTS serpentine

A detailed survey of flow field design types is given, for example, in Li. Interdigitated flow fields are described, e.g. in Vielstich. From all configurations shown, the serpentine flow Adds have the highest technical meaning and are subject to further explanations in the following section. 

The mere fact that a substance may be classed as a fiber does not automatically mean that it is useful. Most known fibers have no known use or very limited uses. Physical properties usually considered in choosing a fiber are strength, durability, and temperature range of usefulness, and also safety if it can be considered a physical property. Under some circumstances hardness will also play a role. In automotive brake systems hardness can become a key factor, because hard fibers can erode metal disks and drums very rapidly. A very large book could be devoted to this subject. Serpentine minerals, Asbestos, alone had more than 3000 known uses. 

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