1) Porous Membrane and Pressure differentials Water at 70°C is passed through a polyethylene membrane of 25% porosity having an average pore diameter of 0.30 µm and tortuosity of 1.8. The pressure upstream is 500 kPa and downstream 125 kPa. Assume a 1.0 micron thick membrane. Estimate the flux of water in m³/m² day. If the tortuosity, pore diameter, porosity and membrane thickness each have an uncertainty of 5% (Example: the membrane thickness can be anything from 0.95 micron to 1.05 microns) how does the flux differ?

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Convective Mass Transfer between Phases

Mass transfer means the transport or movement of mass using streams, phases, components, and so on from one location to another.