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Development of a three dimensional numerical model which considers the effects of the uniform magnetic field on the phospholipids and transmembrane proteins of the red blood cell (RBC) suspended in fluid is described in this study. Visualisation measurement of the RBC motion characterised by the inclination angle of the RBC is also carried out by using the microchannel and high-speed camera to validate the numerical results. Further, the distribution of the magnetic forces on the membrane in relation to the RBC motion, and the evaluation of the overall anisotropic diamagnetic susceptibility of the RBC using the numerical results are discussed.

A two-dimensional unsteady numerical simulation using Immersed Boundary method is carried out to investigate the fluid flow and heat transfer characteristics in a channel of peristaltic micro pump. The heat transfer target wall is a portion of the immovable top wall, while the rest of the wall including the movable bottom wall with fluctuating in the form of a sinusoidally progressive wave maintains the adiabatic condition. The obtained result shows a pair of large-scale recirculation in the case of relatively larger amplitude enhances the convection heat transfer and reduces the size of reverse flow region near the target wall.

Flow characteristics in a peristaltic pump, which can be applied to Micro Total Analysis Systems (μ-TAS), were numerically investigated. For the present computational analysis, we assumed a simple sinusoidal wave pattern to simulate the peristaltic motion of flexible channel wall and applied the Immersed Boundary method to the treatment of the wall boundary. The effects of the parameters such as the amplitude and velocity of the peristaltic motion upon the flow characteristics and pump performance were evaluated in the present paper. Saw-toothed or trapezoidal wall patterns were also calculated to examine the potentiality of the pumping flow rate increase.