Three-Dimensional Numerical Simulation relating to Biofluid Internal Viscous Flows

Abstract

Numerical simulation has been performed for three-dimensional viscous flows within a passage relating to intricate artery structure, i. e. stenosed, branched and curved tubes. The numerical scheme employed is based upon Finite Volume Method adopting the QUICK or QUICKEST upwind code of MAC algorithm. The results for a stenosed tube were compared with flow visualization experiments, which showed an excellent agreement. Flow trace revealed a complex structure of separated and spiral fluid motion at branch. Unstable flows were observed in a curved tube, so that an attempt was made to formulate the enstrophy transfer equation for the analysis of vorticity fluctuation. The present results are encouraging enough to carry out further three-dimensional biofluid internal numerical flow simulations.