Bingham FluidQuestion $4(20$ points$)$

A vertical tube is filled with a Bingham fluid, and a plate is held over the lower end. When the

plate is removed, the fluid may or may not flow out of the tube. Establish a quantitative flow

criteria. Bingham fluid is described as;

$=$ when $|{}_{{?}_{?}}|<msub\; id="EditorElement\_316118"><mrow><mi\; id="EditorElement\_316111"></mi></mrow><mrow\; id="EditorElement\_316117"><mn\; id="EditorElement\_316114">0</mn></mrow></msub>$

$={}_0+\frac{{}_0}{|D_{{?}_{?}}|}$ when $|{}_{{?}_{?}}|{}_0$