What Does Bingham Plastic Model Mean?
The Bingham plastic model consists of two parameters: yield stress and plastic viscosity (PV). The drilling fluid will resist flow initially until the shear stress exceeds a certain limit to break the inter particle bonding present in the fluid. Once the fluid begins to flow, the shear stress and shear rate have a linear relationship. This helps the drilling fluid to suspend the solids and cuttings present in the fluid when circulation is stopped.
This model is widely used because of its simplicity, and its ability to estimate pressure loss in turbulent flow.