Learning Forum

[madhavair19]

Hello,

I have exported particle history data from Fluent and have imported it into EnSight successfully. Now, in EnSight, under the "part" list, I have a part which says "Measured/Particle". I am assuming this belongs to the particle history data that I have imported from Fluent.

Now, I am not able to produce an animation for the particle data that I just imported. Kindly assist me with this and guide me on how to create an animation for the same.

Thank you in advance,

Madhav Nagori

[DrAmine]

If you do have discrete particle data (what EnSight refers to as 'measured data', then you *can* use the Node Track to construct continuous lines out of discrete particle information location. That results in similar tracks to Fluent (Steady State Particle Tracking). Is that what you asked for?

[madhavair19]

Thank you for the reply.

Yes, that is exactly what I was asking for.

I tried to animate the particle data using the node track. But, I am getting a weird animation. The particles are going out of the fluid domain through the "wall" suddenly while travelling inside the flow domain. Then again, it comes back to the fluid domain. It doesn't makes sense because how can a particle exit through a wall ? (My boundary condition at wall is not of "escape" type)

But, when I drew particle tracks in Fluent, it is showing properly and the particles are properly flowing inside the flow domain and is going out of the "outlet" as defined. I am also struggling to animate the particle data in Fluent.

Also, I tried to animate the particle data in CFD Post. I am facing the same issue. The particles are going out of the fluid domain through the wall and then it is coming back.

I am not sure what is causing this problem. Kindly guide me on this.

Thank you,

Madhav Nagori  

[DrAmine]

Is now your question solved or Not? Are you now asking for Fluent? What is the issue?

[madhavair19]

No. My issue is not solved.

I tried to animate the particle data by using node track in EnSight. But, the result I got is not making sense. The particles are not following the intended path.

[DrAmine]

Can you try on small pipe and describe the steps so that we may reproduce? Let us focus on one post processor say CFD Post. Are you exporting xml files?

[madhavair19]

Okay. Let's focus on CFD Post. These are the following steps I follow to animate the particle data in CFD post:

1. In Fluent, File > Export > Particle History Data. The attached image shows the dialog box before exporting the particle data.

 

 

Thus, fluent exported the data as default.xml

 

2. After this, I open CFD Post. In CFD Post, File > Import  > Import fluent particle track file. I selected the default.xml file.

P.S: I also tried to use the above steps to animate the particle data in a simple 2-d axis-symmetric geometry. The result I got was perfectly fine.

[DrAmine]

Can you share a picture or animation of the issue? I cannot reproduce on simple pipe (3D) case.

[madhavair19]

I cannot share the picture of my design or animation. But, I am attaching an image which will explain my issue by using an example of a simple pipe flow.

 

P.S: When I animate the particles for a 2D design, it gives me perfect result; but when I do the same for my 3D design, it is giving me unacceptable results. Is there a specific reason for that ?

Madhav Nagori

[DrAmine]

No as I am using 3d pipe to reproduce. Which version?

[madhavair19]

The version is 2019 R1

[DrAmine]

I cannot reproduce. Can you you provide a university mail address?

[madhavair19]

mnagori@purdue.edu

[DrAmine]

Thanks.