Laminar boundary layer flow of Bingham plastic fluids over a plate

4 Laminar boundary layer flow of Bingham plastic fluids over a plate 

However, to take account of the yield stress acting at the edge of the boundary layer, the integral momentum balance equation (7.7) must be modified as  

Assuming that equation (7.11) still provides a satisfactory representation of the laminar boimdary layer fiow in the region 0 y 3, substituting equation (7.11) into (7.25) yields  

For a Bingham plastic, the fiuid the shear stress at the smface, that is, at y = 0 is given by  

Integration with the initial condition that at jc = 0, 3 = 0, yields S 4.64 

---