首页> 外文会议>ASME international manufacturing science and engineering conference;MSEC2010 >THREE-DIMENSIONAL SIMULATION OF CROSS-FLOW MICROFILTER FOULING IN TORTUOUS PORE PROFILES WITH SEMI-SYNTHETIC METALWORKING FLUIDS
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THREE-DIMENSIONAL SIMULATION OF CROSS-FLOW MICROFILTER FOULING IN TORTUOUS PORE PROFILES WITH SEMI-SYNTHETIC METALWORKING FLUIDS

机译:半合成金属加工流体在曲折孔剖面中横流微滤器沉降的三维模拟

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Fluid flow and fouling mechanisms are examined with a three-dimensional simulation of the tortuous, verisimilar geometry of an α-alumina microfilter. Reconstruction of the three-dimensional geometry was accomplished from two-dimensional cross-sectional cuts, obtained from a focused ion beam. A wall collision model and a particle trapping model are developed for the investigation of fouling mechanisms. The reconstructed geometry and the two models were used in computational fluid dynamics to simulate metalworking colloidal particles travelling through and trapping in the tortuous pore paths of a microfilter. Results reveal sharp flux decline initiating from partial pore blocking and subdued flux decline finalizing in cake layer development with steady-state flow. This flow behavior is in agreement with experimental data from earlier studies. The inclusion of the wall collision model and particle trapping model enabled the revelation of cake layer development as a fouling mechanism.
机译:用三维模拟的α-氧化铝微滤器的曲折,近似几何学检查了流体的流动和结垢机理。三维几何结构的重建是通过从聚焦离子束获得的二维横截面切割完成的。开发了壁碰撞模型和颗粒捕获模型,用于研究结垢机理。重建的几何结构和两个模型被用于计算流体动力学,以模拟金属加工胶体颗粒穿过微滤器的曲折孔道并在其中捕获。结果表明,通量的急剧下降是由部分孔堵塞引起的,而通量下降的减弱最终在具有稳态流的滤饼层发展中得以实现。这种流动行为与早期研究的实验数据一致。壁碰撞模型和颗粒捕集模型的加入使蛋糕层的发展成为一种结垢机制。

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