摘要随着空间技术的发展，热毛细力引起了越来越多的关注，尤其是在微重力场中有着重要体现，其产生的条纹影响晶体生长的质量。研究热毛细对流的输运过程不仅可以丰富理论知识，还可以为改进生产过程提供理论依据，因而具有重要的理论意义和实用价值。61694

对自然对流，热毛细对流进行了简要阐述，对二者有较为直观的对比。介绍了常用的流体数值模拟方法。概述了fluent软件的算法及其优点。描述了了关于本研究中涉及到的流体密度Boussinesq假设、PRESTO格式压力插值算法的选取原因等相关介绍。研究热毛细力驱动的方腔流的输运机理，分析在不同的长宽比，不同的边界条件下，流场中的速度分布，温度分布，从而得出热毛细对流对于传热的影响。

毕业论文关键词  热毛细对流  方腔  Fluent   数值模拟

毕业设计说明书（论文）外文摘要

Title     Numerical study of thermal capillary force driven  cavity flow transport mechanism 

Abstract With the development of space technology , thermal capillary force attracted more and more attention , especially in the field of micro-gravity plays an important manifestation , which produces stripes affect the quality of the crystal growth . Research thermocapillary convection transport processes can not only enrich theoretical knowledge , but also that provide a theoretical basis to improve the production process , and thus has important theoretical significance and practical value. 

For natural convection , thermocapillary convection are briefly described, for both a more intuitive comparison. The common fluid simulation method are Described. And this study on the density of the fluid involved Boussinesq approximation ,PRESTO format interpolation algorithm selection pressure causes other related presentations are also analysed.    Overview of the algorithm and its advantages of the fluent software .  Research thermocapillary force cavity flow driven transport mechanism analysis in different aspect ratios , different boundary conditions, the velocity distribution in the flow field , temperature distribution, so as to arrive thermocapillary convection for heat transfer.

Keywords  Thermocapillary convection    Square cavity   Fluent    Numerical Simulation

1绪论 1

   1.1 本课题背景… 1

   1.2 概述  1

       1.2.1  自然对流及热毛细对流  1

       1.2.2  微重力科学概述   2 

       1.2.3  研究意义  … 3

       1.2.4  国内外研究现状  4

   1.3 本课题研究工作 5

      1.3.1  研究对象 5

      1.3.2  研究内容 5

      1.3.3  本文结构框架 5

   1.4 本章小结 6

2计算方法7

   2.1 常用流体计算研究方法… 7

   2.2 FLUENT简介…8

      2.2.1  概述…8

      2.2.2  simple算法…8

      2.2.3  PRESTO格式压力插值算法9

      2.2.4  流体密度Boussinesq假设…9

      2.2.5   UDF…10

   2.3 数值方法…11

   2.4 本章小结… 12

3数学模型13

   3.1 引言 13

   3.2 数学模型 …13

   3.3控制方程…14

   3.4常用无量纲参数…15