Pipe Flow Experiments - Warwick

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-6- 222 Δ+Δ =pπρπ τπRgzR RLw (6) Where R is the radius of the pipe, and we have substituted Δ=zLsinφ from the geometry of Figure 3.We can see that there is a simple relationship between the shear stress, τw at the wall and the pressure gradient down the pipe. Rearranging the above