...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >CFD simulations of flow and concentration polarization in spacer-filled channels for application to water desalination
【24h】

CFD simulations of flow and concentration polarization in spacer-filled channels for application to water desalination

机译：CFD模拟的流量和浓度极化spacer-filled渠道应用海水淡化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Reverse osmosis(RO)is widely used for the production of drinking water from brackish and sea water.In RO process,pressure is used to separate water and salts by allowing water to pass through a semi-permeable membrane leaving the salts behind.Therefore,controlling membrane fouling will keep the productivity at its optimum condition.Having spacer filaments in the feed channel has proved to reduce the concentration polarization on the surfaces of the membrane and therefore fouling.In this paper computational fluid dynamics(CFD)simulations were carried out for fluid flow through rectangular channels filled with spacers.In order to(1)understand the effect of the spacers on the increase of shear stress on the membrane surface,(2)study the reduction of precipitated salt on the membrane surface and(3)monitor the mass transfer performance across the membrane surface,a computational model that includes all of the important physical processes occurring in membrane systems is required.This paper describes bespoke enhancements to a commercial CFD package,ANSYS-CFX,for modelling the selective transfer of components from the feed channel to the permeate channel through the membrane surface.To validate the new code,this work has been verified against published work and has proved to be as accurate.Further simulations were then carried out,for two different filament configurations,for channel Reynolds numbers up to 800 and with fully functioning dual-membrane channels,as found in industrial spiral-wound desalination modules for example.Results suggest that the zigzagging spacers'type is more desirable comparing with the submerged one in maintaining the membrane and desalination system performance.
机译：反渗透(RO)是广泛使用的从咸水和饮用水的生产海水。单独的水和盐通过允许水通过半透膜离开后面的盐。污染将会保持在最佳效率条件。通道已经证明降低浓度偏振膜的表面因此污染。流体力学(CFD)模拟流体通过矩形渠道充满了逆电流器。的间隔器在增加剪切的影响压力在膜表面,(2)研究减少沉淀盐膜表面和(3)监控质量传递表现在膜表面包含所有的计算模型重要的物理过程发生膜系统是必需的。定制对商业CFD的增强包、ANSYS-CFX造型选择性将组件从提要通道通过膜渗透通道表面。对出版工作,被核实被证明是准确的。然后,两个不同的灯丝配置,为频道雷诺数800年,dual-membrane完全运作渠道,发现工业螺旋缠绕脱盐模块为例。混乱的间距器'type是更多理想与水下的进行比较维持细胞膜和海水淡化系统的性能。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号