Aerodynamic analysis of dirty cars that I live near.

This analysis focuses on slots found on rear spoilers, specifically on the Ford Focus and Fiesta ST versions. Thinking that because they appear on the performance edition they would correspondingly add to the aerodynamics.

All the good photos are from Wikipedia.
All the dirty cars live around me and I don't know the owner.

referenced paper: Kiyoshi Yamane, Nobutoshi Hase, Sadao Fujita, Ryouji Isomura, and Ikuya Takeda & Keiji Sumitani and Toshiyuki Murayama. Concurrent CFD Analysis for Development
of Rear Spoiler for Hatchback Vehicles. SAE TECHNICAL PAPER SERIES 970410. international Congress & Exposition Detroit, Michigan _ . , Detroit, Michigan February 24-27, 1997.

OpenFoam v2106 is the CFD software.
using:
kOmegaSST
SIMPLEFOAM
30m/s air speed
9 million AMR mesh