I have imported a simple .stl model (essentially a box) and ran a simulation on it…
I found it strange that at 33.27 m/s of initial velocity, after 10 seconds cells at the other side of the box (cca. 20x20x20mm, filled with just air) were not affected at all.
Later on I realized that I misconfigured the input data, and then I did another import of the same model with scale fixed from “m” to “mm”.
I have applied exactly the same settings as before and results after simulation are almost exactly the same!
Note that scale on the main view is 1000 smaller as expected, so there must be some settings in simulation itself.
This would usually be something either in the boundary conditions or in simulation control since that is what defines or controls whether the flow reaches that point.
Without the project URL, we are not really sure what project you are referring to or what your current settings are. Feel free to share the URL here and mention so if you wish for us to take a closer look and comment!
Hi, the problem here is that you are running a “Steady-state” simulation, which has the purpose of showing you the equilibrium state of the system (i.e. it has no correlation whatsoever with time.
The process of starting from initial conditions and eventually reaching converge requires a number of iterations. At the moment you are requesting for 10 iterations (“end time”), which is way too few to reach convergence. Because this is a steady-state simulation these definitions are in no way related to time.
Otherwise, if steady-state is what you are looking for, then I’d suggest going back to default settings for the end time, which is 1000, as a starting point.
1037 min - 69.11 core hours later… (for 10 sec of simulation)
What was supposed to be a fun thing , watching airflow with my 3D printed box turned out to be a long nightmare…
I’ll try my luck with particle simulation (where I can watch animations live) and leave CFD to mechanical engineers.
