会员注册 | 登录 | 微信快捷登录 支付宝快捷登录 QQ登录 微博登录 | 帮助中心 人人文库renrendoc.com美如初恋!
站内搜索 百度文库

热门搜索: 直缝焊接机 矿井提升机 循环球式转向器图纸 机器人手爪发展史 管道机器人dwg 动平衡试验台设计

   首页 人人文库网 > 资源分类 > PDF文档下载

磁流体流动与传热过程的三维格子Boltzmann方法研究毕业论文.pdf

  • 资源星级:
  • 资源大小:1.79MB   
  • 资源格式: PDF        下载权限:注册会员/VIP会员
您还没有登陆,请先登录。登陆后即可下载此文档。
  合作网站登录: 微信快捷登录 支付宝快捷登录   QQ登录   微博登录
友情提示
2:本站资源不支持迅雷下载,请使用浏览器直接下载(不支持QQ浏览器)
3:本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰   

磁流体流动与传热过程的三维格子Boltzmann方法研究毕业论文.pdf

硕士论文磁流体流动与传热过程的三维格子Boltzmann方法研究I摘要格子Boltzmann方法是一种新兴的基于介观层次的数值模拟方法,它以离散的运动论和统计力学为出发点来描述流体。本文运用三维不可压格子Boltzmann模型D3Q15研究了磁流体的一些特性。为了解决不可压流动传热问题,文中还推导了相应的三维热模型。本文系统地介绍了格子Boltzmann方法,阐述了力相处理以及用于解决低粘度问题的分数迁移模型,描述了磁流体的基本特性,详细分析了磁流体中的受力。在上述理论的基础上,建立了磁流体流动与传热的三维格子Boltzmann模型,模拟了磁流体的宏观静止结构、热磁对流现象以及矩形通道内的流动与传热过程,分析了外加磁场属性对上述磁流体特征的影响。计算结果表明,格子Boltzmann方法能够基于介观有效地处理流体中磁性粒子上复杂的作用力,并较好地模拟磁流体的流动传热。关键词磁流体格子Boltzmann方法磁性粒子数值模拟3D硕士论文磁流体流动与传热过程的三维格子Boltzmann方法研究IIABSTRACTThelatticeBoltzmannmethod,whichisanovelapproachofnumericalsimulationforfluidhydrodynamics,originatesfromthediscretemovementtheoryandstatisticphysicsandhasbeenappliedtosimulatetheflowandheattransferprocessesofthefluid.A3DincompressibleLatticeBoltzmannmodelD3Q15isproposedinthispapertoinvestigatethecharacteristicsofmagneticfluids.Inordertosolveincompressiblethermalflowproblemstherelevant3DthermalLatticeBoltzmannmodelisalsoestablished.TheLatticeBoltzmannmethodisintroducedsystematicallyinthispaper.ThemethodsdealingwithforcetermandtheLatticeBoltzmannfractionalvolumetricschemedealingwithlowviscositycasesarealsointroduced.Thenbasicpropertiesofmagneticfluidsaredescribedaswellasdetailedanalysisofforcetermsofmagneticnanofluids.Basedonmentionedbeforetheories,the3DLatticeBoltzmannmodelsformagneticfluidsareestablishedtosimulatethemesoscaledstructure,thermomagneticconvectionaswellasflowandheattransferprocessesinrectangularchannelforthemagneticfluids.Theeffectsofthecharacteristicsoftheexternalmagneticfieldonmagneticfluidsareanalyzed.NumericalresultsshowthattheLatticeBoltzmannmethodcaneffectivelydealwiththecomplexforcesactingonthemagneticnanoparticlesonthemesoscalelevel,andsimulatethecomplicatedflowandheattransferbehaviorofmagneticfluids.KeyWordMagneticFluids,LatticeBoltzmannMethod,MagneticNanoparticles,NumericalSimulation,3D硕士论文磁流体流动与传热过程的三维格子Boltzmann方法研究III目录1.1研究背景............................................................................................................11.2论文提出............................................................................................................11.3国内外研究进展..................................................................................................41.3.1磁流体的发展与现状..............................................................................41.3.2格子Boltzmann方法的研究进展..........................................................51.3.3格子Boltzmann方法在磁流体方面的研究现状..................................71.4三维格子Boltzmann方法研究磁流体的必要性..............................................71.5本文的主要工作..................................................................................................82.1格子Boltzmann方法的发展..............................................................................92.1.1格子气自动机(LGA)...........................................................................92.1.2格子Boltzmann方法的思想................................................................102.2三维格子Boltzmann流动模型.......................................................................132.3从格子Boltzmann方程到对流传热方程........................................................143.1边界处理............................................................................................................203.2力项处理............................................................................................................233.3分数迁移............................................................................................................253.3.1流动的分数迁移模型.............................................................................253.3.2温度的分数迁移模型.............................................................................263.3.3分数迁移模型中的力项.........................................................................264.1磁流体的基本特性............................................................................................294.1.1磁化特性.................................................................................................294.1.2热磁特性.................................................................................................304.1.3表面特性.................................................................................................324.2磁流体中力的作用............................................................................................324.2.1磁性粒子间的静磁相互作用................................................................33摘要....................................................................................................................................IABSTRACT......................................................................................................................II主要符号说明...................................................................................................................V1绪论................................................................................................................................12格子Boltzmann方法..................................................................................................93格子Boltzmann方法中的处理方法........................................................................204磁流体的特性..............................................................................................................28硕士论文磁流体流动与传热过程的三维格子Boltzmann方法研究IV4.2.2磁性粒子受外磁场的作用....................................................................344.2.3布朗力....................................................................................................354.2.4范德华吸引力........................................................................................364.2.5磁性粒子受到的其它力........................................................................385.1梯度磁场下磁流体的结构...............................................................................405.2流动传热模型....................................................................................................435.2.1热磁对流.................................................................................................435.2.2矩形通道内磁流体的流动与传热模拟.................................................486.1工作总结...........................................................................................................606.2问题展望...........................................................................................................605磁流体结构与流动传热过程模拟..............................................................................396结束语..........................................................................................................................60致谢..............................................................................................................................62参考文献..........................................................................................................................63

注意事项

本文(磁流体流动与传热过程的三维格子Boltzmann方法研究毕业论文.pdf)为本站会员(图纸帝国)主动上传,人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知人人文库网([email protected]),我们立即给予删除!

温馨提示:如果因为网速或其他原因下载失败请重新下载,重复下载不扣分。

copyright@ 2015-2017 人人文库网网站版权所有
苏ICP备12009002号-5