Hello every body,
for my final year thesis I designed a car body which I now have to analyse in terms of aerodynamic aspects.
To not neglect the "ground effect" I put my vehilce on a flat plate plate 4m x 6m x 1mm.
My computational domain does not include the whole street but "cuts" trough it and goes a few mm below the bottom of the plate.
I also added "real wall"boundary conditions to the plate making it move the opposite direction of the vehicle travel direction.
I wonder now if the plate is part of the lift and drag analysis of the car or not, I obviously want the road to be excluded!
I made a few simple experiments with a cylinder and a plate, but still can't seem to figure out if the plate is part of it or not:
just the cylinder
lift: 21.6
drag: -573 (direction of travel is +)
plate and cylinder
lift: -35 (downforce)
drag: -1393
plate in motion and cylinder
lift: -29
drag: -1364
HELP is very welcome!
Thanks already!
Have a great Sunday!
How are you measuring? Goal? Surface parameter? If goal, global or surface?
You should be able to get what your want with a surface goal, select all surfaces of your body, not the plate. All the surfaces is important, open surfaces will result in erroneous results. Check the swx know for more info on this.
In the end, compare to a known solution for verification.