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The contour of a needle crystal develops from a limb of a disk to a bran-ching structure in growth of dendritic crystals;it is not actually shape pre-serving.However,during the initial stages of growth the crystal has a near-ly constant steady-state velocity and shape,and the structure or pattern ofits solid-liquid interface C can be simplified to a two-dimensional curve lying
The contour of a needle crystal develops from a limb of a disk to a branching structure in growth of dendritic crystals; it is not actually shape pre-serving. Host, during the initial stages of growth the crystal has a near-ly constant steady-state velocity and shape, and the structure or pattern ofits solid-liquid interface C can be simplified to a two-dimensional curve lying