01 ) During a study of a certain flow system the following equation was developed: P2=C+4.6'f...
01 ) During a study of a certain flow system the following equation was developed: P2=C+4.6'f LV P. P.Dg where pi an p2 are pressure between points 1 and 2, C is dimensionless constant, V is velocity, L is the distance between the points, D is the diameter, g is acceleration of gravity and f is drag coefficient. Determine the primary dimensions of the coefficient f so that this equation is homogenous. b) A 25-mm-diameter shaft is pulled through a cylindrical bearing of 25.5- mm inner diameter as shown. The lubricant that fills the 0.3-mm gap between the shaft and bearing is an D=25,5 mm oil having a kinematic viscosity of 8.0x10m²/s and a specific gravity of 0.91. Determine the force P required to pull the shaft at a velocity of 3 m/s. Assume the velocity distribution in the gap is linear. 13 III 11