Summary
It is shown that some quite simple assumptions about the nature of the flow of non-Newtonian liquids lead to the use of the well-known power relation between shear-rate and stress, hitherto regarded as entirely empirical. The treatment is applicable both to thinning and to thickening liquids provided there is no hysteresis.
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References
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Blair, G.W.S. On the use of power equations to relate shear-rate to stress in non-Newtonian liquids. Rheol Acta 4, 53–55 (1965). https://doi.org/10.1007/BF01968736
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DOI: https://doi.org/10.1007/BF01968736