We present a three dimensional model of an open elastic tube immersed in fluid to understand valveless pumping mechanism.A fluid-tube interaction problem is simulated by the volume conserved immersed boundarymethodwhi...We present a three dimensional model of an open elastic tube immersed in fluid to understand valveless pumping mechanism.A fluid-tube interaction problem is simulated by the volume conserved immersed boundarymethodwhich prevents the generation of spurious velocity field near the tube and local cluster of the tube surface.In order to explain pumping phenomena without valves,average net flow ismeasured by changing parameter values such as pumping frequency,compression duration,and pumping amplitude.Some frequencies that make the system reach maximal or minimal net flow are selected to study case by case.We also study the effectiveness of fluid mixing using the Shannon entropy increase rate.展开更多
基金supported by a Basic Science Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Education,Science and Technology(No.2009-0077511)S.Lim acknowledges the support from Charles Phelps Taft Research Center,University of Cincinnatisupported by the Korea Student Aid Foundation(KOSAF)grant funded by the Korea government(MEST)(No.S2-2009-000-00256-1).
文摘We present a three dimensional model of an open elastic tube immersed in fluid to understand valveless pumping mechanism.A fluid-tube interaction problem is simulated by the volume conserved immersed boundarymethodwhich prevents the generation of spurious velocity field near the tube and local cluster of the tube surface.In order to explain pumping phenomena without valves,average net flow ismeasured by changing parameter values such as pumping frequency,compression duration,and pumping amplitude.Some frequencies that make the system reach maximal or minimal net flow are selected to study case by case.We also study the effectiveness of fluid mixing using the Shannon entropy increase rate.
