24- Throughout the inclined pipe which has an angle of , a Newtonian fluid flows as falling motion. The thickness of the film is . Assume that the section where the velocity profile is calculated, is sufficiently far from both ends of pipe. 1- What is the continuity equation formula for cylindirical pipe? a) (ty+xxy+yy+zzy)=(x22y+y22y+z22y)yp+gycosa b) (tx+xxx+yx+zzx)=(x22x+y22x+z22x)xp+gxcosa c) (tx+xxx+yx+zzx)=gxcosa d) (tz+rrz+rz+zzz)=zp+(r1r(rrz)+r2122z+z22z)+gzcosa e) (tz+rrz+rz+zzz)=zp+gzcosa 2- What are the boundry conditions and assumptions? a) y0;y0;r0;0 b) 0;z0;r0;0 c) 0;y0;z0;r0 d) 0;z0;z0;x0 e) y0;x0;r0;r0 3- What is the first integration of equation? a) 0=r1r+C1 b) rz=2gzcosar2+C1 c) rz=gzcosar+C1 d) gzcosar2=r22z e) 0=r22z