Figure 7.
Image sequences acquired at 60 frames∕s showing the effects of a stronger local convective flow at 546 kV∕m and 80 kHz; the initial hematocrit is 0.4% The gravitational force acting on the RBCs is no longer sufficient to provide a downward force to pin the particle down to the stagnation point and, hence, partial resuspension of the particles together with the flow up the recirculation column occurs. The operating parameters in this case, however, are close to the boundaries between the stable operating zone of region 3 and the unstable operating zone of region 4. As such, the bulk convective effects are insufficient to cause complete RBC resuspension but adequately strong to cause shifting of the stagnation point to a new location.