[Shomaz ul Haq]

Dear all. Hope all are well. I have made an o grid based topology for parabolic trough collector. Inner most concentric cylindrical region is fluid. Second region is pipe (solid metal), third region is vacuum (fluid for the time being), and fourth region is again pipe (solid glass). I think I have made the correct number of blocks in the form of o grids. After I have associated required edges to curves and blocked, in the last step the problem is that some of the the vertices of the inner o grid seem to snap to wrong areas of the curves. I have tried using every move vertices option in blocking but the problem remains. I am attaching my blocking image as well as desired image that I found on a post in the forum. Would be grateful if someone could help me out. Thanks.

[bluebase]

Hi Shomaz,

my approach on such a problem is to create points (geo) at the desired locations of vertices. There is even a feature which creates points at x% of a curve length. Alternatively, rotate (and copy) all the points of the meridian cut to the desired location.
When you have points ready, move each vertex to a point.

However, this method might only be good for simple geometries such as yours.

Best regards,
Sebastina

[Shomaz ul Haq]

Thanks a lot Sebastian. I have a couple of questions.
How can I create points at the desired locations of vertices?
What does "geo" means?
How can I create points at x% of a curve length?
How can I rotate (and copy) all meridian points to the desired location and move each vertex to a point? And what did you mean by "cut"?

Would be grateful for answers.

[bluebase]

Hi Shomaz,

geo was just an abbreviation for geometry entity.

I will not answer the other questions.

However, i am sure you will be able to answer those questions yourself quickly. Just take a step back and take a little time to understand the basics of ICEM.
For example:

• do the tutorials coming with ICEM.
• find the guide "Simon's Tipps & Tricks" (pdf) in this forum
• check out the video tutorials on icem on "learncax.com"
• find the guide "icem 102" (pdf) here, or on google
• read the manual (it's not awesome, but it gives some impressions)

If you don't think this is necessary... think about how differ points and vertices in ICEM.


Best regards,
Sebastian

[Shomaz ul Haq]

Thanks Sebastian. You're right that the answers to those questions may be basic fundamentals but sometimes a person gets so entangled in other aspects of cfd that the questions like that seem like a mystery. I apologize if I have disturbed you. Though maybe you could help me out. I have gone through those resources that you have mentioned. They have some pretty good stuff. I did try align vertices but its not working. Any help in this regard would be highly appreciated.

[bluebase]

Hi Shomaz,

please be more specific:

Originally Posted by Shomaz ul Haq

I did try align vertices but its not working.

Describe what you wanted to do and how. What in this process is not working?...
There are to many possible ways to elaborate them all.


With regards,
Sebastian


2 more things:
You are not gonna learn ICEM in 20min. Take some time in understanding those resources. It will make the steep learning curve with ICEM somewhat less steep. I let my students do the same, and it seems that they benefit from this step.
Regarding those small misalignments, they won't have an influence on your simulation. (unless you need periodic boundaries for the cross section)