Current setup: 2x 20k cfm water-based smoke machines facing each other 6' apart blowing across the top or bottom of a fan or set of fans. I was hoping there could be a way to get a vortex that rose in the sky using a series of fans. I've searched youtube and google to find someone who has done this because I feel like I've seen it before, but they've been no help. This is for a work project in defense.
Limitations: I can't use heat to get the smoke to rise higher due to fire risk.
Specific recommendations on: types of industrial fans to use, many small fans vs a few big fans, configuration/setup, all given the budget above would be very helpful. While googling, I found industrial high-velocity fans like this, but they claim to only project <=100' each, which would be underwhelming for me. I know this a fluid dynamics problem, so even recommendations on a setup that would expedite testing for height would be much appreciated.