Yield stress fluid flows occur in a great many operations and unit processes within the oil
and gas industry. This paper reviews this usage within reservoir flows of heavy oil, drilling …

We investigate experimentally the density-unstable displacement flow of two miscible fluids
along an inclined pipe. This means that the flow is from the top to bottom of the pipe …

The dynamics of the removal of a viscoplastic fluid by a Newtonian fluid is investigated
experimentally and theoretically in an inclined pipe based on our previous studies on near …

We investigate the inertial flows found in buoyant miscible displacements using a two-layer
model. From displacement flow experiments in inclined pipes, it has been observed that for …

We present the results of an experimental study of isodense displacement of a yield stress
viscoplastic fluid by a miscible Newtonian one in a horizontal pipe. A central type …

We study theoretically buoyant displacement flows of two generalized Newtonian fluids in a
two-dimensional (2-D) channel with wall slip. We assume that a pseudo-interface separates …

We study the buoyant displacement flow of two immiscible Newtonian fluids in an inclined
duct (two-dimensional channel) theoretically. The fluids may have different viscosities. The …

We consider displacement flows in slightly diverging or converging plane channels. The two
fluids are miscible and buoyancy is significant. We assume that the channel is oriented close …

We study experimentally the isoviscous displacement flow of two immiscible Newtonian
fluids in an inclined pipe. The less dense displacing fluid is placed above the denser …

At some stage after drilling to target depth and before pumping the gravel-packing treatment
or before putting the well on production, the drilling fluid is typically displaced from the …