The effect of turbulence on mass and heat transfer rates of small inertial particles
The effect of turbulence on mass and heat transfer rates of small inertial particles
复制标题
湍流对小惯性颗粒传质传热速率的影响
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
Terese Lovaas
中科院分区：
文献类型：
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作者：
N. Haugen;J. Kruger;D. Mitra;Terese Lovaas
研究了湍流对小重惯性颗粒 (HIP) 和嵌入流体之间的传质和传热的影响。确定了两种效应。第一个效应是由于流体和颗粒之间的相对速度引起的，并且提出了相对速度的模型。第二个效应是由于颗粒的聚集，其中由于密集颗粒簇内消耗的物质的快速耗尽，传质速率受到抑制。最后一个效应与大的 Damkohler 数相关，并且它可以完全控制大于 1 的 Damkohler 数的传质速率。提出了一个模型，描述如何将这种效应纳入现有的粒子模拟工具中。
The effect of turbulence on the mass and heat transfer between small heavy inertial particles (HIP) and an embedding fluid is studied. Two effects are identified. The first effect is due to the relative velocity between the fluid and the particles, and a model for the relative velocity is presented. The second effect is due to the clustering of particles, where the mass transfer rate is inhibited due to the rapid depletion of the consumed species inside the dense particle clusters. This last effect is relevant for large Damkohler numbers and it may totally control the mass transfer rate for Damkohler numbers larger than unity. A model that describes how this effect should be incorporated into existing particle simulation tools is presented.