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Morphological changes in convection-diffusion-limited deposition
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The effect of hydrodynamic flow upon diffusion-limited deposition on a line is investigated using a Monte Carlo model. The growth process is governed by the convection and diffusion field. The convective diffusion field is simulated by the biased-random walker resulting from a superimposed drift that represents the convective flow. The development of distinct morphologies is found with varying direction and strength of drift. By introducing a horizontal drift parallel to the deposition plate, the diffusion-limited deposit changes into a single needle inclined to the plate. The width of the needle decreases with increasing strength of drift. The angle between the needle and the plate is about 45° at high flow rate. In the presence of an inclined drift to the plate, the convection-diffusion-limited deposit leads to the formation of a characteristic columnar morphology. In the limiting case where the convection dominates, the deposition process is equivalent to ballistic deposition onto an inclined surface.
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NAGATANI, Takashi and SAGUÉS I MESTRE, Francesc. Morphological changes in convection-diffusion-limited deposition. Physical Review A. 1991. Vol. 43, num. 6, pags. 2970-2976. ISSN 1050-2947. [consulted: 3 of August of 2026]. Available at: https://hdl.handle.net/2445/9543