Abstract
Abstract This paper deals with both the axial and the tangential annular flows of power-law fluids in concentric annuli, and it specifically focuses on the relation volumetric flow rate Q against pressure drop P. Initially the mutual compatibility of the hitherto obtained results is analyzed, and from this, new results concerning behavior of a parameter λ [a location of maximum axial (tangential) velocity component] are derived. Then, approximative expressions for relations Q against P (independent of A.) are proposed in a sufficiently large region (K,n) where K represents annular aspect ratio and n the flow behavior index n. The deviations of these simple relations from the exact ones are negligible.
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