THE CALCULATION OF FLOW RATE AND PRESSURE DROP FOR THE LAMINAL HELICAL FLOW OF BINGHAM FLUID AND POWER LAW FLUID IN AN ECCENTRIC ANNULAR SPACE

The law of the flow for the laminal helical flow of Bingham fluids with yield stress and power law fluids without yield stress was studied theoretically. The infinite subdivision method for the helical flow of the eccentric annular space in [1] was established, moreover, the apparent viscosity distribution and the velocity distribution are derived. The calculation method of the flow rate and the pressure drop are established in the study too.