A SIMPLE-MODEL FOR THE EVOLUTION OF THE CHARACTERISTICS OF AGGREGATE PARTICLES UNDERGOING COAGULATION AND SINTERING
A SIMPLE-MODEL FOR THE EVOLUTION OF THE CHARACTERISTICS OF AGGREGATE PARTICLES UNDERGOING COAGULATION AND SINTERING
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DOI：
10.1080/02786829308959656
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发表时间：
1993-11-01
影响因子：
5.2
通讯作者：
SCARLETT, B
中科院分区：
文献类型：
--
作者：
KRUIS, FE;KUSTERS, KA;SCARLETT, B
提出了一个简单的模型，描述了凝结和烧结引起的颗粒形态、尺寸和数量浓度的演变，该模型忽略了聚集体和初级颗粒的多分散性的扩散。考虑了从自由分子到连续体状态的不规则/分形结构对碰撞核的影响。该模型的预测与非球形粒子动力学的详细二维截面模型的预测非常吻合。在对主要烧结机制进行理论评估后，所提出的模型应用于气溶胶反应器中硅的激光合成。
A simple model describing the evolution of particle morphology, size, and number concentration by coagulation and sintering is presented that neglects the spread of the polydispersity of aggregate and primary particles. The influence of irregular/fractal structure on the collision kernel is accounted for, from the free molecular to the continuum regime. The model predictions compare well to those of a detailed two-dimensional sectional model of nonspherical particle dynamics. After a theoretical evaluation of the main sintering mechanism, the proposed model was applied to laser synthesis of silicon in an aerosol reactor.