comsol boundary integtation post

http://www.comsol.asia/community/forums/general/thread/2734/

wall shear stress

http://comments.gmane.org/gmane.science.analysis.femlab/7191

wall shear stress

http://www.comsol.com/community/forums/general/thread/20365/#p74623

http://depositfiles.com/files/9rbvcym5c

good to know

today has new finding.
http://www.comsol.com/community/forums/general/thread/12251/

what?deformation?strain?

Monday morning sink in the deformation and strain differencs.
caught in a box, after i read the lecturernotes.

http://www.engin.umich.edu/class/bme456/ch4alternatestress/bme332altstress.htm
file:///C:/Users/fruitkiwi/Desktop/BME%20332%20%20Alternate%20Definitions%20of%20Stress.htm
http://www.engin.umich.edu/class/bme456/ch3strain/bme456straindef.htm

http://www.math.nyu.edu/faculty/tabak/vorticity.pdf

how to comsol

i also do not know when i can graduate and match with COMSOL.

they dont come find me .
i just can pray.
http://www.comsol.se/community/forums/general/thread/8840/
http://www.comsol.fr/community/forums/general/thread/9322/

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

COMSOL material properties study

So today i review the different material properties like ogden, yeoh, all if need input to comsol , it should be in polynomial form.
for this the clearer advantage has been on the ansys and adina, since they possess more advantage and easy user interface on it.
http://www.kxcad.net/ansys/ANSYS/ansyshelp/thy_mat5.html


calculating average shear stress on a surface
http://www.comsol.com/community/forums/general/thread/4916/

shear stress

http://www.comsol.com/community/forums/general/thread/4916/

how do plot shear stress in comsol?

hyperelastic

http://www.engin.umich.edu/class/bme332/homework4.2005/homework4sol.htm

http://www.sci.utah.edu/~weiss/classes/bioen7210/Homework/hw3/hw3.pdf

hyperelastic good solution

nolinear elastic model

http://www.engin.umich.edu/class/bme332/homework4.2005/homework4sol.htm

Homework #4: Nonlinear Elastic Constitutive Models

large deformation in comsol

http://www.engin.umich.edu/class/bme456/largedef/largedef.htm

large deformation hyperelastic curve, thank you.

In this section we will only give a brief introduction to nonlinear elastic materials under large deformations, materials more generally known as hyperelastic. Many soft tissues under cyclic loading may be represented as hyperelastic materials, in a from referred to as pseudo-elastic materials. The stress-strain curve of hyperelastic materials is shown below:



Notice that the stress and strain quantities used are the 2nd Piola Kirchoff stress and the Green-Lagrange strain tensor. This serves as a reminder that to be consistent we have to derive the constitutive equations in terms of these quantities.

Next, we recall that any elastic material may be represented by a strain energy function. For Hookean (linear) elastic materials this takes the following form:

http://www.technion.ac.il/docs/comsol/sme/smeug.pdf page 94-106

mooney rivlin

http://en.wikipedia.org/wiki/Mooney%E2%80%93Rivlin_solid

finally understand what is mooney rivlin...lol

Floating fluid in the space

I found some awesome video, where the water blow during space.
http://exploration.grc.nasa.gov/WaterBalloon/

which is quite similar with what i have done.
hope one day, my fluid will moving in the space in finite element model

update comsol

COMSOl 4.2a 下载
http://hi.baidu.com/achemist_2008/blog/item/c66952c37912ef28e5dd3bac.html


http: // w w w.rayfile.com/zh-cn/files/4b764480-1630-11e1-a38d-0015c55db73d/

FSI comsol

http://www.comsol.com/community/forums/general/thread/18637/

luckily let me found it
actually fsi include not slip...in comsol

understand ALE

Finally understand what is spatial and material in ALE in comsol.

spatial means you do not move with the flow, so when flow move, measured from you, you will get a displacement.

material which move with the flow, measurement from you will always zero, since you move with the flow.

http://www.comsol.se/community/forums/general/thread/6787/

comsol trying

ok, today retry COMSOL, as due to its user friendly interface.
http://www.uk.comsol.com/community/forums/general/thread/15857/

http://www.uk.comsol.com/community/forums/general/thread/15857/