Dear Ladies and Gentleman,
i started yesterday my new simulation with a new reference body and somehow it didn´t simulate my geometry but the simulation area itself. I will give you a detailed instruction on what I did from the import till simulation setup, but I will also provide Screenshots and everything too.
Geometries:
- STEP Import and created a External flow volume around my geometry
- Fix interferences of my geometry
- Did a booloean subtract with Target body [Flow region] and Tool bodies [Only the rear spoiler on the car]. My goal is to simulate the rear spoiler and see what forces will be generated with the car infront of it, so I didn´t apply the whole geometry in this field and only the parts from my spoiler.
Simulations:
- Incompressible Simulation
- choose the material and placed my boundry conditions with velocity inlet on the front and pressure outlet on the rear. Every other site of the cube is a Slip wall.
- Normally I created Forces and moments and clicked only the parts from the spoiler nothing else but somehow it got deleted again.
- In Mesh settings I choose the Hex-Dominant Algoritm because I only need external Flow and I decimated my Faces. At first I had around 13 Million Faces and a 3 Hour runtime with 178 Core hours and with this setting I have 543K cells and a 45min runtime with 2.9 core hours. I also Used the mesh as domain in the simulation.
My main goal is to simulate the rear spoiler and to see how the air moves around it and what forces will be generated. The car infront is only there to give me a more reliable data. The car should just sit in the wind and let the air move around it. I don´t need any forces messured from it.
It would be great if you could help me out and tell me where my mistake was, what I need to change and how I setup the simulation correctly that I get my desired data. Thanks!!
If you need access to my Simulations or more information I will gladly provide it to you.
