Trying to create my first simple airflow simulation

[Nokthra]

Hi everyone,

after creating some stuff in Inventor, I wanted to take a deeper look in one part. I´m interested in the airflow in a specific part and how it behaves.

I looked around and found, that CFD is free for students too and thought: "Think this will work."

Sadly, I don´t really have a clue how to get things started in it. I browsed through the tutorial section and watched a view videos. But it seems, that I´m doing something wrong, as my results are some kind of nothing.

I have configured the materials, assigned boundary conditions (think there´s the mistake), autodefined the mesh (not sure what it´s good for) and run the solving. But nothing really happens. So I think my conditions are wrong set.

http://r76.img-up.net/part48a5.JPG

I have made a quick scetch of my part I want get analyzed. It´s really simple. Just something like a pipe, formed as a "T". The airflow starts at the lower point, indicated by the blue arrow and gets seperated in the "pipe".

So I´ve set my conditions to "air flow" and put the value in it. But it seems I´ve selected the wrong surface/volume/what ever.

Any tips?

[Royce_adsk · Accepted solution]

Hi Nokthra,

As a new user I would suggest that you do the basic training first.  It is available online and free!

http://wikihelp.autodesk.com/Simulation_CFD/enu/2013/Help/0407-Learning407/0687-Self-Pac687

This will help you to understand most of the workflow, clicks/picks, and a rudimentary CFD background.

After going through this training I would suggest that you look at the analysis guidelines.  This is a great starting point for just about any model that you are starting to setup.

For instance, your description points me in the direction of internal incompressible flow analysis.

http://wikihelp.autodesk.com/Simulation_CFD/enu/2013/Help/0407-Learning407/0726-Guidelin726/0727-Int...

From there you could look at some of the example models.  A great one which is basically the reverse of your problem is the faucet example.  This has two inlets to 1 outlet.

http://wikihelp.autodesk.com/Simulation_CFD/enu/2013/Help/0407-Learning407/0408-Example_408/0430-Fau...

Give all that a try and let us know how it turns out for you!

Thanks,

Royce

[Nokthra]

Hi,

thank you very much! In my first attempts I missed to created some void volume it seems.

Now everything is working fine and I got some decent results.

Thanks!