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Computational fluid dynamics simulations of direct contact heat and mass transfer of a multicomponent two-phase film flow in an inclined channel at sub-atmospheric pressure

机译:低于大气压的倾斜通道中多组分两相膜流的直接接触传热和传质的计算流体动力学模拟

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摘要

A method for simultaneous heat and multicomponent mass transfer incorporated with the volume of fluid surface tracking method was developed in a two-dimensional inclined channel. The process in the channel includes direct contact condensation of hydrocarbon mixtures with and without noncon densable gas, and distillation effect is also considered. Interfacial transport was performed by a multi component phase change model in kinetic forms considering the assumption of thermodynamic equilibrium at the vapor-liquid or vapor/gas-liquid interface using Peng-Robinson equations. The shear-stress transport k-ω turbulence model damped near the vapor-liquid or vapor/gas-liquid interface was used. The hydrocarbon mixtures in both phases were described by five pseudo-components, and Ste fan-Maxwell equations were used to describe diffusional interactions in the multicomponent system. Parametric studies were performed to investigate further the model with various boundary conditions. Simulations for a binary system were also performed for a preliminary validation. For the liquid phase, similar trends of the Sherwood numbers were found between the results by simulations and predicted by the Penetration Theory. For the vapor phase, good agreement was observed between the results by empirical correlation and simulations.
机译:在二维倾斜通道中开发了一种同时进行热量和多组分传质的方法,并结合了流体表面跟踪法。通道中的过程包括有和没有不可冷凝气体的烃混合物的直接接触冷凝,并且还考虑了蒸馏作用。考虑到在汽-液或汽/气-液界面处的热力学平衡的假设,使用Peng-Robinson方程以动力学形式通过多组分相变模型进行界面传输。使用在气-液或气/气-液界面附近阻尼的剪切应力传递k-ω湍流模型。两个相中的烃混合物均由五个假组分描述,Ste fan-Maxwell方程用于描述多组分系统中的扩散相互作用。进行了参数研究,以进一步研究具有各种边界条件的模型。还对二进制系统进行了仿真,以进行初步验证。对于液相,通过模拟并通过渗透理论预测,结果之间发现了舍伍德数的相似趋势。对于气相,通过经验相关和模拟观察到了良好的一致性。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2012年第22期|p.5808-5818|共11页
  • 作者单位

    School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;

    School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China,National Engineering Research Centre of Distillation Technology, Tianjin 300072, China;

    School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China,National Engineering Research Centre of Distillation Technology, Tianjin 300072, China;

    School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China,National Engineering Research Centre of Distillation Technology, Tianjin 300072, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    computational fluid dynamics; direct contact condensation; volume-of-fluid; multicomponent; heat and mass transfer; two-phase film flow;

    机译:计算流体动力学;直接接触凝结;流体体积多组分传热传质;两相膜流;

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