• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >An implicit algorithm for melting and settling of phase change material inside macrocapsules
【24h】

An implicit algorithm for melting and settling of phase change material inside macrocapsules

机译：一种用于大胶囊内部相变材料熔化和沉降的隐式算法

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

A new, implicit algorithm for melting and settling of macro-encapsulated phase change material (PCM) is presented. The fixed grid mathematical model is based on the enthalpy-porosity technique and the volume of fluid (VOF) method. An immersed boundary method is applied to calculate the solid settling velocity, which is then prescribed by an extended Darcy term. As a test case, unfixed melting in a quasi two-dimensional cubic capsule is chosen. The newly introduced implicit algorithm is compared to an existing explicit algorithm and it is shown that the implicit calculation greatly improves the stability of the model. Moreover, the numerical model is validated against experiments performed within this work, whereby for the first time the settling velocity of the solid PCM is measured directly. Good agreement is found between simulation and experiment. The abilities of the new algorithm are demonstrated by multiple calculations with varying wall temperatures. Thereby, it is found that the solid settling velocity is at a quasi steady state only for a certain time. This time span reduces for higher wall temperatures.
机译：提出了一种新的隐式算法，用于熔化和稳定宏观封装的相变材料（PCM）。固定网格数学模型基于焓-孔隙率技术和流体体积（VOF）方法。采用沉浸边界方法计算固体沉降速度，然后由扩展的达西项规定。作为测试用例，选择准二维立方胶囊中的未固定熔化。将新引入的隐式算法与现有的显式算法进行比较，结果表明隐式计算大大提高了模型的稳定性。此外，通过在这项工作中进行的实验对数值模型进行了验证，从而首次直接测量了固态PCM的沉降速度。在仿真和实验之间找到了很好的协议。新算法的功能通过在不同壁温下进行多次计算得到了证明。由此，发现固体沉降速度仅在一定时间内处于准稳态。对于较高的壁温，此时间间隔会减少。

著录项

  • 来源
  • 作者

    Moritz Faden; Andreas Konig-Haagen; Stephan Hoehlein; Dieter Briiggemann;

  • 作者单位

    Chair of Thermodynamics and Transport Processes (LTTT), Centre of Energy Technology (ZET), University of Bayreuth, Universitaetsstraβe 30, 95440 Bayreuth, Germany;

    Chair of Thermodynamics and Transport Processes (LTTT), Centre of Energy Technology (ZET), University of Bayreuth, Universitaetsstraβe 30, 95440 Bayreuth, Germany;

    Chair of Thermodynamics and Transport Processes (LTTT), Centre of Energy Technology (ZET), University of Bayreuth, Universitaetsstraβe 30, 95440 Bayreuth, Germany;

    Chair of Thermodynamics and Transport Processes (LTTT), Centre of Energy Technology (ZET), University of Bayreuth, Universitaetsstraβe 30, 95440 Bayreuth, Germany;

  • 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

    Close-contact melting; Phase change material; Numerical model; OpenFOAM;

    机译：紧密接触熔化;相变材料;数值模型OpenFOAM;

相似文献

  • 外文文献
  • 中文文献
  • 专利
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