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Search took 0.00 seconds. Search: Posts Made By: liguifan
Forum: OpenFOAM February 14, 2012, 18:50
Replies: 70
Views: 28,340
Posted By liguifan
I think there is tool under filter is plot over...

I think there is tool under filter is plot over intersection curve.
1) In property inspection field, choose the wall object (whoever the name you named it).
2) Use "Clip" to get rid of the part you...
Forum: OpenFOAM February 13, 2012, 19:02
Replies: 70
Views: 28,340
Posted By liguifan
Can you post your bifurcation geometry as well as...

Can you post your bifurcation geometry as well as how you measure the WSS?
Forum: OpenFOAM September 23, 2011, 06:06
Replies: 70
Views: 28,340
Posted By liguifan
Dear Amir, I tried \tau=\mu*\frac{du}{dy} ...

Dear Amir,

I tried \tau=\mu*\frac{du}{dy} and your code to get some wall shear stress plots.

In published paper, they normally define wall shear stress as the way you did.

After some...
Forum: OpenFOAM September 19, 2011, 22:28
Replies: 70
Views: 28,340
Posted By liguifan
Dear Amir, Thanks for the correction. I...

Dear Amir,

Thanks for the correction. I misunderstood the definition.

I try to finer my mesh and see what happened next.

Regards
Forum: OpenFOAM September 19, 2011, 19:23
Replies: 70
Views: 28,340
Posted By liguifan
Dear Amir, Thanks for the correction. ...

Dear Amir,

Thanks for the correction.

This code works however the results are a little bit different from it should be in my case. After a little bit research. I found that the definition of...
Forum: OpenFOAM September 18, 2011, 08:21
Replies: 70
Views: 28,340
Posted By liguifan
Dear Amir, Thanks for the reply. I...

Dear Amir,

Thanks for the reply.

I found that the tangetient component of traction tensor is t-(t.n)n as you decribed.

For the code stuff:
Is this the right thing:...
Forum: OpenFOAM September 16, 2011, 23:36
Replies: 70
Views: 28,340
Posted By liguifan
Dear Amir, Thanks for your reply. To my...

Dear Amir,

Thanks for your reply.

To my knowledge, the wall shear stress is mu*velocity gradient. In the code of wallShearStress:
-mesh.Sf().boundaryField()[patchi]
...
Forum: OpenFOAM September 16, 2011, 23:30
Replies: 70
Views: 28,340
Posted By liguifan
Can any one tell me the difference between...

Can any one tell me the difference between wallShearStress and the definition?

For newtonian flow the wall shear stress is defined as mu*du/dy which is proportional to the normal velocity gradient...
Forum: OpenFOAM September 16, 2011, 03:59
Replies: 70
Views: 28,340
Posted By liguifan
Hi Bernhard, I will try it later today....

Hi Bernhard,

I will try it later today. However, i still don't understand how to plot wall shear stress along a bent pipe.

Have you got any idea for that?

Thanks
Forum: OpenFOAM September 16, 2011, 03:55
Replies: 70
Views: 28,340
Posted By liguifan
Hi Amir, What modification have you done to...

Hi Amir,

What modification have you done to measure the wall shear stress ?

Thanks
Forum: OpenFOAM September 16, 2011, 01:46
Replies: 70
Views: 28,340
Posted By liguifan
Hi Bernhard, I think wallShearStress utility...

Hi Bernhard,

I think wallShearStress utility is for turbulent flow. My case is laminar flow and I want to plot the wall shear stress along the pipe. My code is to find laminar flow but don't know...
Forum: OpenFOAM September 16, 2011, 00:43
Replies: 70
Views: 28,340
Posted By liguifan
Measuring wall shear stress in bend pipe

My geometry is a bifurcation and on of the vessel is bent. I want to measure the wall shear stress along the bent vessel. The wall shear stress is already calculated. I only find a way to measure the...
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