Realistic boundary conditions in SimVascular through inlet catheter modeling

Inlet Boundary Conditions for Embedded Les

The paper evaluates a new method to prescribe synthesized turbulent inlet boundary conditions. The method can also be used when prescribing turbulent fluctuations at an interface between (U)RANS and LES regions when the flow enters the LES region. When making LES, DES or hybrid LES-RANS a precursor channel DNS is often used. The disadvantage of this method is that it is difficult to re-scale th...

Changing Boundary Conditions: Effects On Catheter Heating

Introduction. During an MRI examination, induced radio frequency (RF) currents on electric conductors, such as electrode lines within catheters may cause temperature increase in surrounding regions. This heating problem has been investigated in several studies, with emphasis on properties such as resonance length and immersion length [1, 2, 3]. However, with the increasing development of MR-gui...

Realistic boundary conditions for stochastic simulations of reaction-diffusion processes

Many cellular and subcellular biological processes can be described in terms of diffusing and chemically reacting species (e.g. enzymes). Such reactiondiffusion processes can be mathematically modelled using either deterministic partialdifferential equations or stochastic simulation algorithms. The latter provide a more detailed and precise picture, and several stochastic simulation algorithms ...

Asymptotic analysis of the Gunn effect with realistic boundary conditions

A general asymptotic analysis of the Gunn effect in n-type GaAs under general boundary conditions for metal-semiconductor contacts is presented. Depending on the parameter values in the boundary condition of the injecting contact, different types of waves mediate the Gunn effect. The periodic current oscillation typical of the Gunn effect may be caused by moving charge-monopole accumulation or ...

Uncertainty Propagation of Pc-mri Derived Inlet Boundary Conditions in Computational Hemodynamics Models of Humanaorta