title: A novel periodic boundary condition for computational hemodynamics studies.
abstract: In computational fluid dynamics models for hemodynamics applications, boundary conditions remain one of the major issues in obtaining accurate fluid flow predictions. For major cardiovascular models, the realistic boundary conditions are not available. In order to address this issue, the whole computational domain needs to be modeled, which is practically impossible. For simulating fully developed turbulent flows using the large eddy simulation and dynamic numerical solution methods, which are very popular in hemodynamics studies, periodic boundary conditions are suitable. This is mainly because the computational domain can be reduced considerably. In this study, a novel periodic boundary condition is proposed, which is based on mass flow condition. The proposed boundary condition is applied on a square duct for the sake of validation. The mass-based condition was shown to obtain the solution in 15% less time. As such, the mass-based condition has two decisive advantages: first, the solution for a given Reynolds number can be obtained in a single simulation because of the direct specification of the mass flow, and second, simulations can be made more quickly.
authors.affiliation: Division of Mechanical Engineering, School of Engineering, Faculty of Applied Science, The University of British Columbia, Kelowna, BC, Canada.
authors.forename: Fereshteh
authors.initials: F
authors.lastname: Bahramian
authors.affiliation: Division of Mechanical Engineering, School of Engineering, Faculty of Applied Science, The University of British Columbia, Kelowna, BC, Canada Biomedical Engineering Graduate Program, Faculty of Applied Science, The University of British Columbia, Vancouver, BC, Canada hadi.mohammadi@ubc.ca.
authors.forename: Hadi
authors.initials: H
authors.lastname: Mohammadi
mesh_terms: D000465:Algorithms; D000818:Animals; D001783:Blood Flow Velocity / Q000502:physiology*; D001794:Blood Pressure / Q000502:physiology*; D001808:Blood Vessels / Q000502:physiology*; D003198:Computer Simulation; D006801:Humans; D008955:Models, Cardiovascular; D009991:Oscillometry / Q000379:methods*; D033081:Shear Strength / Q000502:physiology; D014655:Vascular Resistance / Q000502:physiology
keywords: Finite volume method; computational fluid dynamics; direct numerical solution; heart valve prostheses; large eddy simulation; turbulence; vascular hemodynamics