BLOOD FLOW TRANSPORT THROUGH AN ELASTIC VESSEL BY THE VIBRO-VOLUMETRIC METHOD 2. SIMULATION RESULTS
V.S. Sizikov1,2, A.P. Chupakhin3
1Saint Petersburg State Institute of Technology, Saint Petersburg, Russia
2Institute for Problems in Mechanical Engineering, Russian Academy of Sciences (IPME RAS), Saint Petersburg, Russia
3Lavrentyev Institute of Hydrodynamics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
Keywords: vibro-volumetric method, perfusion, blood pumping, rheological model, viscoelastic fluid
Abstract
Results of numerical simulations of blood pumping through an elastic vessel using the vibro-volumetric method are presented. The simulations characterize blood motion in the vessel under vibro-volumetric actuation. It is shown that blood flow depends significantly on the frequency and amplitude of the driving force, as well as on the opening angle of the channel formed by the walls of the vibrating device. A qualitative analysis of the problem demonstrates the existence of a steady-state regime of blood transport along the vessel under the action of the vibrational force, with transport velocities characteristic of various perfusion pump designs. The influence of the key operating parameters of the device on the blood transport velocity is established, enabling flow rate control by varying the external excitation frequency for a given channel opening angle and driving force amplitude. The obtained dependences confirm the feasibility of perfusion and flow rate control of blood and blood-substitute solutions by adjusting the design and operating parameters of the device. A direction for further model improvement through optimization of the channel wall geometry is proposed.
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