Kengo Ichiki

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It is shown that the method of reflections in resistance form ͑with truncated multipoles͒ is one of many possible iterative methods to obtain the inverse of the mobility matrix ͑with the same truncation͒ in low-Reynolds-number hydrodynamics. Although the method of reflections in the mobility form is guaranteed to converge, it is found that in the resistance(More)
A numerical simulation of a gas-fluidized bed is performed without introduction of any empirical parameters. Realistic bubbles and slugs are observed in our simulation. It is found that the convective motion of particles is important for the bubbling phase and there is no convection in the slugging phase. From the simulation results, non-Gaussian(More)
When there is no clear separation between micro-and macro-scales, ergodicity cannot be invoked to transform ensemble into volume averages. In such cases it is necessary to use ensemble averaging directly. The calculation of such averages, however, converges slowly and therefore requires a large number of realizations of the system. This paper describes a(More)
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