Arbitrary flow boundary conditions in smoothed dissipative particle dynamics: A generalized virtual rheometer

Abstract

In this work, a methodology to perform rheological studies on smoothed dissipative particle dynamics under arbitrary flow configurations is introduced. To evaluate the accuracy and flexibility of the proposed methodology, viscometric studies for Newtonian fluids under pure shear, pure extension, and arbitrary flows in bulk or near walls are introduced. The applicability of this methodology to obtain viscoelastic properties of non-Newtonian fluids, such as polymer solutions, is also presented. The new computational approach offers relevant advantages in a variety of applications ranging from multiscale simulations to the rheological characterization of complex flows.