The structure of the proximal anastomosis flowin stationary mode at moderate Reynolds numbers
V.M. Molochnikov1,2, A.N. Mikheev3, A.B. Mazo4, E.I. Kalinin4, M.A. Klyuev1,2, N.D. Pashkova1,2
1FRC Kazan Scientific Center RAS Kazan, Kazan,Russia
2Kazan National Research Technical University named after A.N. Tupolev, Kazan,Russia
3FRC Kazan Scientific Center RAS, Kazan,Russia
4Kazan (Volga Region) Federal University, Kazan,Russia
Keywords: channel branching, flow separation, experiment, direct numerical simulation, secondary flows, flow turbulence
Abstract
Results of an experimental study and direct numerical modeling of the steady flow in a channel branching region simulating the proximal anastomosis of the femoral artery, are reported. The Reynolds number was Re = 1500, which value corresponds to the maximum blood flow during the period of heart contractions. The ratio of the rates of the liquid flows through the branch and the main channel was a varied parameter. Regularities in the development of the flow structure in the primary channel and in the branch region are revealed, with much attention having been paid to flow separation regions. The occurrence of secondary flows localized within the separation regions has been established. The ranges of the ratio of the flow rates at which flow turbulence signs appear in the mixing layer at the interface between these regions are determined.
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