Effects of a zero normal-concentration-gradient outflow boundary condition on concentration polarization in a CFD study of a reverse osmosis process

2018 ◽  
Vol 40 (11) ◽  
Author(s):  
Abderrazaq Hamdache ◽  
Mohamed Belkacem
Keyword(s):  
Boundary Condition ◽  
Reverse Osmosis ◽  
Concentration Gradient ◽  
Concentration Polarization ◽  
Normal Concentration ◽  
Outflow Boundary Condition ◽  
Outflow Boundary

scholarly journals A new outflow boundary condition

1992 ◽  
Vol 14 (5) ◽  
pp. 587-608 ◽  
Author(s):  
T. C. Papanastasiou ◽  
N. Malamataris ◽  
K. Ellwood
Keyword(s):  
Boundary Condition ◽  
Outflow Boundary Condition ◽  
Outflow Boundary

A Parallel Domain Decomposition Algorithm for Simulating Blood Flow with Incompressible Navier-Stokes Equations with Resistive Boundary Condition

2012 ◽  
Vol 11 (4) ◽  
pp. 1279-1299
Author(s):  
Yuqi Wu ◽  
Xiao-Chuan Cai
Keyword(s):  
Boundary Condition ◽  
Blood Flow ◽  
Domain Decomposition ◽  
Stokes Equations ◽  
Navier Stokes ◽  
Navier Stokes Equations ◽  
Outflow Boundary Condition ◽  
Outflow Boundary ◽  
Domain Decomposition Algorithm ◽  
Fully Coupled

AbstractWe introduce and study a parallel domain decomposition algorithm for the simulation of blood flow in compliant arteries using a fully-coupled system of nonlinear partial differential equations consisting of a linear elasticity equation and the incompressible Navier-Stokes equations with a resistive outflow boundary condition. The system is discretized with a finite element method on unstructured moving meshes and solved by a Newton-Krylov algorithm preconditioned with an overlapping restricted additive Schwarz method. The resistive outflow boundary condition plays an interesting role in the accuracy of the blood flow simulation and we provide a numerical comparison of its accuracy with the standard pressure type boundary condition. We also discuss the parallel performance of the implicit domain decomposition method for solving the fully coupled nonlinear system on a supercomputer with a few hundred processors.

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