Abstract
Space-time patterns of wall shear stress (WSS) resulting from the numerical simulation of pulsating hemodynamic flows in semicoronal domains are analyzed, in the case of both regular semicoronal domains and semicoronal domains with bumpy insertions, mimicking aneurysm-like geometries. A new family of cardiovascular risk indicators, which we name three-band diagrams (TBDs), are introduced, as a sensible generalization of the two standard indicators, i.e., the time-averaged WSS and the oscillatory shear index. TBDs provide a handy access to additional information contained in the dynamic structure of the WSS signal as a function of the physiological risk threshold, thereby allowing a quick visual assessment of the risk sensitivity to individual fluctuations of the physiological risk thresholds. Due to its generality, TBD analysis is expected to prove useful for a wide host of applications in science, engineering, and medicine, where risk assessment plays a central role. © 2011 American Physical Society.
Anno
2011
Autori IAC
Tipo pubblicazione
Altri Autori
Gizzi, A.; Bernaschi, M.; Bini, D.; Cherubini, C.; Filippi, S.; Melchionna, S.; Succi, S.
Editore
Published by the American Physical Society through the American Institute of Physics,
Rivista
Physical review. E, Statistical, nonlinear, and soft matter physics (Print)