The gelling of waxy crudes and the deposition of wax on the inner walls of subsea crude oil
pipelines present a costly problem in the production and transportation of oil. The timely …

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 …

Molecular dynamics simulations were employed to reveal the phase change mechanisms of
paraffin wax in a multiphase system of crude oil comprised of oil, paraffin wax, bitumen, and …

Many drilling muds and crude oils are known to be thixotropic. Under a wide range of
pressures, temperatures and flow regimes, they display unusual complex flow properties …

Publisher Summary This chapter provides an overview of the main mathematical and
computational aspects of viscoplasticity. It discusses Bingham flow in cylinders and cavities; …

We investigate the problem of the start up of a compressible flow in a pipeline filled with a
viscoplastic and thixotropic material. The objective of this study is to examine the possibility …

Highly paraffinic (or waxy) crude oil can cause significant problems in subsea pipelines due
to wax–oil gel blockage resulting from the precipitation of the wax components. Once …

A comprehensive framework for modeling elasto-viscoplasticity in complex fluids is
discussed. It is based on the plasticity mechanism of kinematic hardening, which is widely …

For the complex transient thermo-hydraulic restart process of a long-buried hot oil pipeline, it
takes a long time to solve the restart simulation model, which cannot meet the requirements …

Heavy oil and bitumen exhibit non-Newtonian rheological behaviors at lower temperatures.
Thixotropy is one such behavior. Thixotropy affects the efficiency and length scale of mixing …