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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Mixing characterization and energetic dissipation in different networks of minichannels
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Mixing characterization and energetic dissipation in different networks of minichannels

机译:混合特性和能量的耗散在不同的网络minichannels

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This work is dedicated to the mixing characterization inside two geometries of minireactor by using an electrochemical method.The first one is composed of only minichannels crossing at right angles while the second one includes crossing minichannels and T_shaped parts.The used method consists to measure the limiting diffusion current at the surface of microelectrodes flush-mounted into the wall at the 10 minichannels outlet of each network.The limiting diffusion current is linked to the concentration of an electroactive species flowing in the minichannels and its measurement allows the characterization at the cell outlet of the radial dispersion by using an electrochemical tracer method.The electrochemical tracer is injected in the middle of the upstream part of the cell and the cell mixing effectiveness is characterized for Reynolds number ranging between 55 and 250 by comparing the tracer response on the microprobes located at each outlet channel.The experimental results show distinctly that the second geometry is more promising in terms of mixing process than the network of crossing minichannels.Pressure drop measurements are carried out inside the two geometries at Reynolds numbers ranging from 1 to 1000 in order to evaluate the energetic dissipation.The data show,for both cells,that the pressure loss can be represented by a Reynolds-Forchheimer-type equation characteristic of porous media.
机译:这个工作是致力于混合表征在两个几何图形通过使用一个电化学minireactor方法。minichannels交叉而形成一个直角第二个包括交叉minichannels,T_shaped部分。测量的极限扩散电流微电极表面嵌装进10 minichannels出口的墙网络。一个电活性物种的浓度流入minichannels及其测量允许电池出口的特征通过使用一个电化学径向扩散示踪剂方法。注入中间的上游部分细胞和细胞混合效果特征之间的雷诺数范围55和250年通过比较示踪剂的反应每个出口的微探针位于通道。第二个几何是更有前途比网络的混合过程跨越minichannels。在两个几何图形进行吗雷诺兹数从1到1000评估能量的耗散。显示,两个细胞,压力损失由Reynolds-Forchheimer-type表示多孔介质的特征方程。

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