power-law fluid | Energy Glossary

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power-law fluid

1. n. [Drilling Fluids]

A fluid described by the two-parameter rheological model of a pseudoplastic fluid, or a fluid whose viscosity decreases as shear rate increases. Water-base polymer muds, especially those made with XC polymer, fit the power-law mathematical equation better than the Bingham plastic or any other two-parameter model. Power-law fluids can be described mathematically as follows:

See: Bingham plastic modelcentipoisedirect-indicating viscometerHerschel–Bulkley fluidNewtonian fluidnon-Newtonian fluidplastic fluidpseudoplasticrheological propertyrheologyshear rateshear stressviscosityXC polymer

Power-law fluid.
Power-law fluid.