Rr. Huilgol et Mp. Panizza, ON THE DETERMINATION OF THE PLUG-FLOW REGION IN BINGHAM FLUIDS THROUGH THE APPLICATION OF VARIATIONAL-INEQUALITIES, Journal of non-Newtonian fluid mechanics, 58(2-3), 1995, pp. 207-217
Numerical methods developed through the theory of variational inequali
ties are used to determine the plug flow regions in two classes of pip
e flow problems in Bingham fluids. The first set, including a test pro
blem in a concentric annulus, deals with flows in eccentric annuli in
general, and the second one examines the flow in an L-shaped region.