Question

Molten polystyrene flows through a circular tube at 210 ^oC under the pressure drop of 500 psi. Given the inside diameter of the tube is 0.25 in. and the tube is 3 in. in length, calculate the volumetric flow rate Q in cm³/s. Assume the viscosity of the melt is 10,000 Poise. [ Poise = g/(cm^.s); psi = lb_f/(in²) ]. Hint: The melt flow inside the tube can be approximately treated as laminar flow with constant viscosity.

Answer 1