Abstract
The effect of thermal convection upon the diffusion-limited deposition (DLD) on a plate is investigated using a Monte Carlo model. The periodic flow of roll structure appearing in Be'nard convection is considered to be thermal convection. Morphological changes of diffusion-limited aggregation (DLA) under Be'nard convection are studied by computer simulation. The convective diffusion field is simulated by the biased-random walker resulting from a superimposed drift which represents the thermal convection. It is found that the deposit leads to the formation of a characteristic columnar morphology with increasing thermal convection. The columnar morphology is periodic in correspondence to the roll structure in Be'nard convection.
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