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Development of a Low-Reynolds-number k-omega Model for FENE-P Fluids
A low-Reynolds-number k-omega model for Newtonian fluids has been developed to predict drag reduction of viscoelastic fluids described by the FENE-P model. The model is an extension to viscoelastic fluids of the model for Newtonian fluids developed by Bredberg et al. (Int J Heat...
Analytical solutions for Newtonian and inelastic non-Newtonian flows with wall slip
This work presents analytical solutions for both Newtonian and inelastic non-Newtonian fluids with slip boundary conditions in Couette and Poiseuille flows using the Navier linear and non-linear slip laws and the empirical asymptotic and Hatzikiriakos slip laws. The non-Newtonian constitutive equ...
Optimal control problems with nonregular mixed constraints
In this paper we derive necessary conditions for a simple class of mixedconstrained optimal control problems that do not satisfy known regularity conditionson the mixed constraints. Such problems are a particular class of nonregular problems.Notably the necessary conditions we derive are sta...
Optimized Cross-Slot Flow Geometry for Microfluidic Extensional Rheometry
A precision-machined cross-slot flow geometry with a shape that has been optimized by numerical simulation of the fluid kinematics is fabricated and used to measure the extensional viscosity of a dilute polymer solution. Full-field birefringence microscopy is used to monitor the evolution...
REIT - Reitoria 245