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Numerical Investigation of Foam Mixing in Gypsum Slurry.

机译:石膏浆料中泡沫混合的数值研究。

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摘要

Foamed gypsum slurry is an integral part of gypsum wallboard. The present work describes the dynamics of foam injection into gypsum slurry, which is a power-law fluid with the consistency and behavior indexes depending on the local foam content. The work is divided into two parts. In the first part, the injection of a single straight foam jet into gypsum slurry at rest is studied numerically. The effect of the initial foam jet radius and velocity on the flow structure is elucidated at two different values of the Schmidt number. Also, the effect of the water stucco ratio (WSR) on the flow development and the rate of mixing is predicted. In the second part, gypsum slurry-foam mixture formed as a result of foam injection into crossflow is described. In both the cases, they are studied as a non-Newtonian power-law fluid with the consistency and behavior indexes depending on air content. The flow under consideration is a submerged jet of a boundary-layer type, which curves under the action of the fluid brought by crossflow. The numerical solution proposed here allows one to address the main parameters of interest---the depth of penetration and the rate of mixing.
机译:泡沫石膏浆是石膏墙板的组成部分。本工作描述了向石膏浆液中注入泡沫的动力学,石膏浆液是一种幂律流体,其稠度和行为指标取决于局部泡沫含量。这项工作分为两个部分。在第一部分中,对在静止状态下向石膏浆液中喷射单个直的泡沫射流进行了数值研究。在两个不同的施密特数值下,阐明了初始泡沫射流半径和速度对流动结构的影响。同样,可以预测水灰泥比(WSR)对流动发展和混合速率的影响。在第二部分中,描述了由于泡沫注入错流而形成的石膏浆料-泡沫混合物。在这两种情况下,都将它们作为非牛顿幂律流体进行研究,其稠度和行为指标取决于空气含量。所考虑的流是边界层类型的浸没式射流,该射流在错流带来的流体作用下弯曲。这里提出的数值解决方案可以解决感兴趣的主要参数-渗透深度和混合速率。

著录项

  • 作者

    Dannessa, Dominic A.;

  • 作者单位

    University of Illinois at Chicago.;

  • 授予单位 University of Illinois at Chicago.;
  • 学科 Mechanical engineering.
  • 学位 Ph.D.
  • 年度 2017
  • 页码 185 p.
  • 总页数 185
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 遥感技术;
  • 关键词

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