Abstract: Using the differential motion equation in fluid mechanics, this paper
developed the flow models of the laminar flow of Bingham's fluid in an
inclined eccentric annulus.By solving the differential equation，it presented
the accurate flow velocity distribution，formulas of Bingham's fluid under
flow conditions and analyzed the flow features of Bingham's fluid laminar
in an inclined eccentric annulus, It has been proved that when flow velocity
in the annulus is higher, i.e, when the rate between Bingham's fluid yield
value and the gradient of pressure are less, the maximum velocity."radius"
of Bingham's fluid laminar flow approximates to that of Newton's, This
paper also analyzed the error produced therefrom, The results showed that
when the ratio between the yield value and the gradient of pressure is not
larger than 0.Olm, the relative error is less than 1.270,6;and lastly the
paper also proposed the accurate flow rate and pressure fall formulas bf
Bingham's laminar flow under flow conditions,

Key words: Annulus flow Flow model Flow rate Flow equat