What should be the average velocity of water in a tube of diameter 2 cm so that the flow is (i) laminar (ii) turbulent? The viscosity of water is 0.001 Pa-s. (for water pipes `Rlt 2000` stream line flow, `Rgt3000` turbulent flow)

Explanation

Here, `d=2cm =0.02m,`
`eta=0.001 Pa-s, rho10^(3)kg//m^(3)`
i) For stream line flow, Reynolds no. R = 2000, v = ?
Now, `v=(Reta)/(rhod)=(2000xx0.001)/(10^(3)xx0.02)=0.1ms^(-1)`
ii) For tubulent flow, Reyolds number,
`R=3000, v=?v=(3000xx.001)/(10^(3)xx0.02)=0.15ms^(-1)`