Inflow and Outflow Boundary Conditions for Direct Numerical Simulations.

Inflow/Outflow Boundary Conditions for Particle-Based Blood Flow Simulations: Application to Arterial Bifurcations and Trees

When blood flows through a bifurcation, red blood cells (RBCs) travel into side branches at different hematocrit levels, and it is even possible that all RBCs enter into one branch only, leading to a complete separation of plasma and RBCs. To quantify this phenomenon via particle-based mesoscopic simulations, we developed a general framework for open boundary conditions in multiphase flows that...

Characteristic Outflow Boundary Conditions for Simulations of One- Dimensional Hemodynamics

The Windkessel outflow models, describing the relation between blood pressure and flow, are commonly used for modeling the truncated downstream vasculature bed in the arterial system. By means of a characteristic approach, a unified formalism of characteristic boundary conditions was proposed in the present work. A novel defined parameter, termed the reflection coefficient, is convenient to qua...

Comparison of outflow boundary conditions for subsonic aeroacoustic simulations

OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. SUMMARY Aeroacoustics simulations require much more precise boundary conditions than classical aerodynamics. Two classes of non-reflecting boundary conditions for aeroacoustics are compared in the present work: characteristic analysis based methods and Tam...

outflow Boundary Codition Issues in Direct Numerical Simulation of Three- Dimensional Plane Wake Flow

Assessment of inflow boundary conditions for compressible turbulent boundary layers

A description of different inflow methodologies for turbulent boundary layers, including validity and limitations, is presented. We show that the use of genuine periodic boundary conditions, in which no alteration of the governing equations is made, results in growing mean flow and decaying turbulence. Premises under which the usage is valid are presented and explained, and comparisons with the...