Production Car Development - Rain Test

The Large Wind Tunnel Emmen (LWTE) accepts full-scale cars in its test section for performing water management tests. Water mixed with a fluorescent dye is injected upstream of the car. The test object is illuminated with multiple UV lamps and the distribution and flow of the water droplets is documented with video or still cameras. The functionality of windshield wipers and the soiling due to water droplets on the side window and the rearview mirror can thus be studied.