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首页> 外文会议>ASME(American Society of Mechanical Engineers)/JSME Pressure Vessels and Piping Conference: Computational Technologies for Fluid/Thermal/Structural/Chemical Systems with Industrial Applications v.1; 20040725-20040729; San Diego,CA; US >NUMERICAL ANALYSIS OF NATURAL CONVECTION AND PHASE CHANGE PROBLEM WITH FINITE VOLUME METHOD
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NUMERICAL ANALYSIS OF NATURAL CONVECTION AND PHASE CHANGE PROBLEM WITH FINITE VOLUME METHOD

机译：自然对流和相变问题的有限体积数值分析

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摘要

A numerical analysis is performed in this study to observe the phase change and natural convection problem occurring in the confined geometry. The unsteady, incompressible 3-D Navier-Stokes equation and energy equation have been considered as governing equation in this study. In addition, numerical tools based on finite volume method were developed and those were found to be tools to analyze phase change and natural convection problem with qualitative accuracy. For verification, phase interfacial lines and flow patterns were compared to previous studies and showed good agreements for the case of square cavity and extended cubic. For application, phase change and natural convection problem inside circular pipe were considered. With and without axial flow cases were compared with each other to observe the effect of axial flow on the flow pattern and phase change characteristics. It was found that the forced convective flow tends to disturb the formation of ice-plug and natural convective flow tends to promote the energy exchanges and expedite the formation of ice-plug.
机译：在这项研究中进行了数值分析，以观察在受限几何形状中发生的相变和自然对流问题。在该研究中，不稳定的，不可压缩的3-D Navier-Stokes方程和能量方程被视为控制方程。此外，开发了基于有限体积法的数值工具，并发现它们是定性准确地分析相变和自然对流问题的工具。为了进行验证，将相界面线和流型与以前的研究进行了比较，并且对于方腔和扩展立方的情况显示出很好的一致性。在应用中，考虑了圆形管内的相变和自然对流问题。比较有轴流和无轴流情况下的情况，以观察轴流对流型和相变特性的影响。已经发现，强迫对流倾向于干扰冰塞的形成，而自然对流倾向于促进能量交换并加速冰塞的形成。

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