A theoretical analysis of laminar natural convection heat transfer to non‐Newtonian fluids

An equation is given for the local Nusselt number in laminar convection heat transfer to power‐law non‐Newtonian fluids. This expression, which even for Newtonian fluids ( n = 1) does not appear to have been derived before, is obtained from the exact asymptotic solution of the appropriate laminar boundary layer equations and is applicable to any two‐dimensional surface or a surface of revolution about an axis of symmetry when, as is usually the case, N pr > 10.