@Article{JCM-36-4, author = {Li, Kun and Youngju, Lee and Starkey, Christina}, title = {A New Boundary Condition for Rate-Type Non-Newtonian Diffusive Models and the Stable MAC Scheme }, journal = {Journal of Computational Mathematics}, year = {2018}, volume = {36}, number = {4}, pages = {605--626}, abstract = {

We present a new Dirichlet boundary condition for the rate-type non-Newtonian diffusive constitutive models. The newly proposed boundary condition is compared with two such well-known and popularly used boundary conditions as the pure Neumann condition [1] and the Dirichlet condition by Sureshkumar and Beris [2]. Our condition is demonstrated to be more stable and robust in a number of numerical test cases. A new Dirichlet boundary condition is implemented in the framework of the finite difference Marker and Cell (MAC) method. In this paper, we also present an energy-stable finite difference MAC scheme that preserves the positivity for the conformation tensor and show how the addition of the diffusion helps the energy-stability in a finite difference MAC scheme-setting.

}, issn = {1991-7139}, doi = {https://doi.org/10.4208/jcm.1703-m2015-0359}, url = {https://global-sci.com/article/84486/a-new-boundary-condition-for-rate-type-non-newtonian-diffusive-models-and-the-stable-mac-scheme} }