Multiphase continuum modeling of thrombosis in aneurysms and recirculation zones

2021 ◽  
Vol 33 (9) ◽  
pp. 093314
Author(s):  
Anass Bouchnita ◽  
Aleksey V. Belyaev ◽  
Vitaly Volpert
Keyword(s):  
Continuum Modeling ◽  
Recirculation Zones

scholarly journals Continuum modeling perspectives of non-Fourier heat conduction in biological systems

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ákos Sudár ◽  
Gergely Futaki ◽  
Róbert Kovács
Keyword(s):  
Biological Systems ◽  
Phase Lag ◽  
Dual Phase ◽  
Continuum Modeling ◽  
Biological Origin ◽  
Ultrasound Surgery ◽  
Thermal Models ◽  
Wide Range ◽  
Fourier Heat Conduction ◽  
The Continuum

Abstract The thermal modeling of biological systems is increasingly important in the development of more advanced and more precise techniques such as ultrasound surgery. One of the primary barriers is the complexity of biological materials: the geometrical, structural, and material properties vary in a wide range. In the present paper, we focus on the continuum modeling of heterogeneous materials of biological origin. There are numerous examples in the literature for non-Fourier thermal models. However, as we realized, they are associated with a few common misconceptions. Therefore, we first aim to clarify the basic concepts of non-Fourier thermal models. These concepts are demonstrated by revisiting two experiments from the literature in which the Cattaneo–Vernotte and the dual phase lag models are utilized. Our investigation revealed that these non-Fourier models are based on misinterpretations of the measured data, and the seeming deviation from Fourier’s law originates from the source terms and boundary conditions.

Numerical Simulation of Blood Flow in Patient-Specific Stenotic Carotid Bifurcation Geometries

2009 ◽  
Author(s):  
Megan Cummins ◽  
Jenn S. Rossmann
Keyword(s):  
Vortex Shedding ◽  
Carotid Bifurcation ◽  
Secondary Flows ◽  
Patient Specific ◽  
Mechanical Forces ◽  
Plaque Vulnerability ◽  
Governing Equations ◽  
Unstable Plaque ◽  
Recirculation Zones ◽  
Insight Into

The hemodynamics and fluid mechanical forces in blood vessels have long been implicated in the deposition and growth of atherosclerotic plaque. Detailed information about the hemodynamics in vessels affected by significant plaque deposits can provide insight into the mechanisms and likelihood of plaque weakening and rupture. In the current study, the governing equations are solved in their finite volume formulation in several patient-specific geometries. Recirculation zones, vortex shedding, and secondary flows are captured. The forces on vessel walls are shown to correlate with unstable plaque deposits. The results of these simulations suggest morphological features that may usefully supplement percent stenosis as a predictor of plaque vulnerability.

Triple-continuum modeling of shale gas reservoirs considering the effect of kerogen

2015 ◽  
Vol 24 ◽  
pp. 252-263 ◽  
Author(s):  
Min Zhang ◽  
Jun Yao ◽  
Hai Sun ◽  
Jian-lin Zhao ◽  
Dong-yan Fan ◽  
...  
Keyword(s):  
Shale Gas ◽  
Continuum Modeling ◽  
Gas Reservoirs ◽  
Shale Gas Reservoirs

Continuum modeling of cooperative traffic flow dynamics

2009 ◽  
Vol 388 (13) ◽  
pp. 2705-2716 ◽  
Author(s):  
D. Ngoduy ◽  
S.P. Hoogendoorn ◽  
R. Liu
Keyword(s):  
Traffic Flow ◽  
Flow Dynamics ◽  
Continuum Modeling

Continuum modeling of argon radio frequency glow discharges

1987 ◽  
Vol 50 (9) ◽  
pp. 492-494 ◽  
Author(s):  
Albert D. Richards ◽  
Brian E. Thompson ◽  
Herbert H. Sawin
Keyword(s):  
Radio Frequency ◽  
Continuum Modeling ◽  
Glow Discharges
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