Gas with a density of 1.2 kg/m and viscosity of 1.05 10-5 Pa.s is injected into the pipe with a banana puree. The banana puree has a density 1030 kg/m and flows at a steady state with a mean linear velocity of 0.75 m/s through a tube 17.4 m long with an inside diameter of 0.085 m. The puree is a power law fluid with rheological properties of k = 6.51 Pa-s and the flow behavior index on n = 0.458. The mass flowrate of the gas is 12 kg/h, the gas is introduced into the pipeline at 20C and at a pressure of 1.2 bar. Estimate the pressure gradient for the two-phase flow using the Lockhart and Martinelli model for one-meter length of the pipe. UL LULC since the velocity deviates from the critical velocity. The critical velocity (VLC) is estimated from: Since the liquid is laminar, A modified parameter X = X NRE gen 2-n dn vic P K8n-1 NRe,gen (3n+ 1 4n 16 NRe dn v-np K8n-1 = 2100 n = 4fp| 3n+ 1 4n u = 4 SP (1) 14/2/2 1-n n is required [20]