What might seem odd is that there is an entry for peanut butter, which was determined experimentally in Baker et al. . You might think that a substance like peanut butter behaves more as a solid than a fluid. This is partly due to the length of time it takes peanut butter to flow. It is so slow that it seems to have more of the characteristics of a solid. As it turns out, peanut butter is not a Newtonian fluid, but this is not due to its slow flow characteristic. It has properties similar to toothpaste and ketchup, two materials that are discussed in more depth in the next section.
KeywordsBoundary Layer Shear Rate Line Vortex Rigid Body Motion Velocity Function
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