coding

http://people.sc.fsu.edu/~jburkardt/f_src/fem2d_navier_stokes/fem2d_navier_stokes.html

http://www.salihnet.freeservers.com/engineering/cfd/cfd_codes.html

where to download fotran

i decide to use fortran to write cfd code today.
http://silverfrost.com/32/ftn95/ftn95_personal_edition.aspx

http://www.youtube.com/watch?v=ghKVGnpA77U&feature=related

something wrong

http://books.google.com.au/books?id=nezE1Wmb_9wC&pg=PA155&dq=mitral+valve+pressure&hl=en&sa=X&ei=yN8zT8DdLo_yrQePqaDHDA&ved=0CDYQ6AEwADge#v=onepage&q=mitral%20valve%20pressure&f=false

http://eurheartj.oxfordjournals.org/content/5/8/660.full.pdf+html

comsol finding

http://www.comsol.com/community/forums/general/thread/6746/

just realize maybe sometime i am wrong.

why cfd must always have pressure

Today after half a year running, i finally admit my mistake and decide to give myself a restart. as in cfd to stabilize the equation, you must have a
http://comments.gmane.org/gmane.science.analysis.femlab/7099

dP without a velocity or mass flow Direchlet constraint is not well-posed. This can be proven mathematically by examining the eigenvalues of the Jacobian matrix of partial derivatives wrt state variables.

You can specify velocity at inlet or outlet and pressure must be specified at the outlet in order to get a well-posed boundary conditions. That is why the boundaries are set up the way they are in COMSOL. They do it correctly, and what you are getting is expected.

http://www.physicsforums.com/showthread.php?t=351724

有看没懂

** ERROR *** CODE ADF2701: Fluid node (label) 2806 is not attached to solid fluid-structure interface 1. The relative distance to solid boundary element 8382 is 1.49E 01. The fluid nodal coordinates are (-2.7E-02, -6.2E-02, 6.64E-03). The points and their coordinates of the solid boundary element are: point 203 = ( 1.588E-02, -6.22E-02, 1.194E-02) point 4910 = ( 1.785E-02, -6.22E-02, 1.375E-02) point 2708 = ( 1.538E-02, -6.22E-02, 1.482E-02) Possible causes are: * Fluid-structure interfaces in fluid and solid models are not coincident; * Solid boundary elements are too coarse compared with fluid boundary elements on the same fluid-structure interface.


1 hellend112 你定义的结构与流场的单元不匹配，可能是两种网格尺寸差距太大，调剂网格 2010/4/24 02:08
2 hellyeah88g0 首先感谢楼上，我做的过程中，两种网格划分是完整一样的阿 2010/4/24 16:48
3 longbn 可能是耦合盘算时，节点自己运动，偏离FSI接触面，我曾遇到这样的问题 2010/4/25 07:27
4 boksir9a99 引用:原帖由 xirenqiang 于 2008-7-20 17:37 发表可能是耦合盘算时，节点自己运动，偏离FSI接触面，我曾遇到这样的问题 那要怎么解决呢？ 2010/4/25 22:07
5 steven 我已经解决了，在MESHING-CREATEPOINT那里输入流固接触点的点号，在MESHING-ALE MESH CONSTRAINTS-FIX MESH 看你所选中的点是否被固定 这样 在重新画网格就可以了！ 2010/4/26 12:46
6 ybyguhj *** ERROR *** CODE ADF2701: Fluid node (label) 1 is not attached to solid fluid-structure interface 1. The relative distance to solid boundary element 566 is 5.72E 00. The fluid nodal coordinates are (7.72E-02, 0.00E 00, -1.1E-01). The points and their coordinates of the solid boundary element are: point 84 = ( 7.725E-02, 0.000E 00, 1.925E-02) point 308 = ( 7.461E-02, -1.99E-02, 0.000E 00) point 91 = ( 7.725E-02, 0.000E 00, 0.000E 00) Possible causes are: * Fluid-structure interfaces in fluid and solid models are not coincident; * Solid boundary elements are too coarse compared with fluid boundary elements on the same fluid-structure interface. 你好，请教研发网的朋友，在meshing--creat mesh --point中输入哪个点的号呢？然后在MESHING--ALE mesh constraints --fix mesh 中又应当输入什么呢？ 2010/4/27 03:26
7 nxd11g23 因为流体和结构的交互面处的网格不对齐。中间有空隙。处理措施：1.查找空隙的处所，细化网格，或者采用同样的划分方法，避免涌现。2.重新构建此处的流固耦合面。必需要匹配3.如果留空隙，就无法算出结构

http://www.blogger.com/post-create.g?blogID=3056279781698873835

job not yet finished

http://www.bsse.ethz.ch/cobi/education/Spatial_Modeling/Exercise6.1