The formulation of an oil-based mud was made possible with the oil extracted from rubber seeds using famous soxhlet extraction method. formulated API standard 25 g bentonite to 350 mL base fluid. choice Rubber comes as a result its flash point and aniline which lies in range oils used for formulation. rheological properties OBM were beyond scope viscometer hence thinner added reduce viscosity s...

Synthetic polymer fluids are becoming a popular replacement for bentonite slurries to support excavations for deep foundation elements. However, the rheological properties of the polymer fluids used in excavation support have not been studied in detail, and there is currently confusion about the choice of mathematical models for this type of fluid. To advance the current state of knowledge, a l...

A deterministic method for sequential estimation of 3-D rotations is presented. The Bingham distribution is used to represent uncertainty directly on the unit quaternion hypersphere. Quaternions avoid the degeneracies of other 3-D orientation representations, while the Bingham distribution allows tracking of large-error (high-entropy) rotational distributions. Experimental comparison to a leadi...

The appropriate estimation of frictional losses in a pipeline system is essential. So far, little attention has been paid to determining the friction factors with non-Newtonian fluids, especially rough pipes. This study aims at calculating factor using validated three-dimensional Computational Fluid Dynamics models Ansys CFX. Steady-state computations are performed three different incompressibl...

Electrorheological (ER) fluids change their flow properties dramatically when an electric field is applied. These fluids are usually composed of dispersions of polarizable particles in an insulating base fluid or composed of liquid crystal polymer. To build more suitable and complicated designs for application of ER fluid, the simulation of ER fluid as well as experiments are important. First, ...

Abstract. The neXtSIM-F (neXtSIM forecast) forecasting system consists of a stand-alone sea ice model, neXtSIM (neXt-generation Sea Ice Model), forced by the TOPAZ ocean forecast and ECMWF atmospheric forecast, combined with daily data assimilation concentration. It uses novel brittle Bingham–Maxwell (BBM) rheology, making it first based on continuum model not to use viscous–plastic (VP) rheolo...