Question 142: Properties of Matter

Question

What will be the nature of flow of water from a circular tap, when its flow rate increased from 0.18 L/min to 0.48 L/min? The radius of the tap and viscosity of water are 0.5 cm and 10
$$-$$3
Pa s, respectively. (Density of water : 10
3
kg/m
3
)

Accepted Answer

The nature of flow is determined by reynolds no
$$R = {{ho VD} \over \eta }$$
If R  2000 $$ 	o $$ flow is turbulent
$${R_1} = {{4 	imes {{10}^3} 	imes 0.18 	imes {{10}^{ - 3}}} \over {60 	imes \pi  	imes {{10}^{ - 2}} 	imes {{10}^{ - 3}}}} = {{4 	imes {{10}^5} 	imes 0.18} \over {60\pi }}$$
$$ = 0.0038 	imes {10^5} = 380$$
$${R_2} = {{0.48} \over {0.18}} 	imes 380 = 1018$$

Answer

Steady flow to unsteady flow

Answer

Unsteady to steady flow

Answer

Remains turbulent flow

Answer

Remains steady flow

Properties of Matter

What will be the nature of flow of water from a circular tap, when its flow rate increased from 0.18 L/min to 0.48 L/min? The radius of the tap and viscosity of water are 0.5 cm and 10 $-$3 Pa s, respectively. (Density of water : 10 3 kg/m 3 )

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