偏心圆环管中塑性流体流动特性的研究

Laminar fully developed flows of time-independent viscous shear-thinning fluids in straight eccentric annuli are considered. The fluid rheology is modeled by the power-law constitutive equation, which is representative of many industrial process liquids in process heat exchangers, extruders and drilling wells, among others. The flow cross-section geometry is mapped into a unit circle by means of a coordinate transformation, and the governing momentum equation is solved by the finite-difference techniques using second-order accurate discretization. Numerical solutions for a wide variation of shear index (0.2 n 1.0) are presented.