1: A two-phase fluid is flowing upward in a vertical pipe of internal diameter of 1 in. the fluid properties are as follows: liquid density =60ib//ft^(3); vapor density =2ib//ft3; liquid viscosity =0.4cp; vapor viscosity =0.01cp. If the vapor quality is 0.2 and the total flow rate of liquid and vapor is 3600ib//h, what is the local flow pattern expected to be