Multiphase flow simulation by the cascaded lattice Boltzmann method_Daniel Lycett-Brown_University of Southampton参考.pptVIP

下载本文档

7
0
约4.48千字
约 24页
2018-03-15 发布于贵州
举报
版权申诉

Multiphase flow simulation by the cascaded lattice Boltzmann method_Daniel Lycett-Brown_University of Southampton参考.ppt

1、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。。
2、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
3、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
4、该文档为VIP文档，如果想要下载，成为VIP会员后，下载免费。
5、成为VIP后，下载本文档将扣除1次下载权益。下载后，不支持退款、换文档。如有疑问请联系我们。
6、成为VIP后，您将拥有八大权益，权益包括：VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
7、VIP文档为合作方或网友上传，每下载1次，网站将根据用户上传文档的质量评分、类型等，对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档

Multiphase flow simulation by the cascaded lattice Boltzmann method_Daniel Lycett-Brown_University of Southampton参考

* Multiphase flow simulation by the cascaded lattice Boltzmann method Energy Technology Research Group Daniel Lycett-Brown and Kai H. LuoICMMES Taipei, 23-27 July 2012 Outline Cascaded LBM Single phase results Extension to multiphase Multiphase validation High Reynolds and Weber number droplet collisions Conclusions K.-L. Pan, P.-C. Chou Y.-J. Tseng, Phys Rev E 80, 036301 (2009) * * 1-D Start from the 1-D Maxwell distribution function: 3 discrete velocities, v(i). Complete moment set: Solving for φ(i): Temperature from the closure relation: I. Karlin P. Asinari, Physica A 389, 1530 (2010) * D2Q9 Constructed as a product of the D1Q3 lattice. This gives: * Central Moments Introduce central moments And identity M. Geier, A. Greiner J.G. Korvink, Phys. Rev. E 73, 066705 (2006) * Central Moments Taking f(0,0) as an example Collision can be written as: * Shear layer Roll-up of perturbed double periodic shear layer. Initial condition: Vorticity at t = 1.0: Reynolds number: On a 128x128 grid, highest stable Re: LBGK: Re ~ 20,000 Cascaded (at ω3 = ω4 = 1.98): Re ~ 1,000,000 * Spurious vortices On a 256x256 grid, Re = 30,000. LBGK: Spurious vortices Cascaded, ωB = ω3 = ω, ω4 = 1.99: Minimum grid size for no spurious vortices: LBGK: 288 x 288 Cascaded: ω3 = 1.8, ω4 = 1.95 192 x192 ω3 = 1.0, ω4 = 1.0 100 x100 * Spurious vortices On a 64x64 grid, Re = 10,000. Cascaded, ωB = ω, ω3 = ω4 = 1.0: * Accuracy and Convergence Cascaded LBGK on 240x240 grid, compared to LBGK solution on 1440x1440 grid. Re = 20,000. e.g. Varying ω3: LBGK error, 0.32% Convergence, ωB = ω, ω3 = ω4 = 1.0: * Viscosity Viscosity measured from decay of sinusoidal shear wave ω = 0.5 ω = 1.7 O(u2) O(u4) X. Shan S. Chen, Phys. Rev. E: 47, 1815 (1993) * Multiphase Calculate the force as in Shan-Chen, nearest neighbours: Carnahan-Starling equation of state: P. Yuan and L. Schaefer. Phys. Fluids,