total: 13 marks

Referring to water flow in Fig. 1 and by using data in Table 1, determine the terminal settling velocity for a sand particle and assess the accuracy of the settling velocity obtained with regards to the drag coefficient. | 2014 Re~700 Fig. 1 Table 1 Parameters Values 0.5 mm Average particle diameter, dp Density of particle, pp Density of water, Pw Viscosity, Hw Water temperature in settling tank 2600 kg/m3 998.2 kg/m3 1.002 x 10-3 Ns/m2 20 C