Published on January 22, 2025–Updated on January 22, 2025
Dates
on the January 28, 2025
Café : 15h
Séminaire: 15h15
Location
Institut de Physique de Nice
Hydrodynamic Instability and Turbulence Suppression in Cardiovascular Flows
Seminars of the Institut de Physique de Nice,
Abstract:
Blood flow within the circulatory system is a complex and dynamic phenomenon essential for maintaining physiological functions. One fascinating aspect of blood flow is the occurrence of instabilities, deviations from smooth and laminar flow that can have significant implications for vascular health and disease. In this talk I will discuss the hydrodynamic (helical) instability that we have identified in pulsating pipe flow within cardiovascular settings, such as the aortic arch. We find that geometrical distortions of small, yet finite, amplitude excite a state consisting of helical vortices during flow deceleration. The resulting flow pattern grows rapidly in magnitude, breaks down into turbulence, and eventually returns to laminar when the flow accelerates.
I will also present our recent findings of a separate study, which indicate that if the flow of ordinary fluids is driven in a pulsatile mode that incorporates all the key features of the cardiac waveform, there is a significant reduction in turbulent friction.
When browsing Université Côte d'Azur website and Université Côte d'Azur components websites by profile ("I am" menu), informations may be saved in a "Cookie" file installed by Université Côte d'Azur on your computer, tablet or mobile phone. This Cookie file contains informations, such as a unique identifier, the name of the portal, and the chosen profile. This Cookie file is read by its transmitter. During its 12-month validity period, it allows to recognize your terminal and to propose the chosen profile as your default home page.
You have accepted the deposit of profile information cookies in your navigator.
You have declined the deposit of profile information cookies in your navigator.
"Do Not Track" is enabled in your browser. No profiles information will be collected.