[myuncle (OP)]

Normally the Tesla valve is associated with fluid, but what about air suction? Example: make a spiraling coil using a 3D printer, from floor to ceiling. At the bottom of the coil, the pipe will be about 20 cm diameter, decreasing gradually to about 5 mm at the top (creating a capillary suction effect). Along the tube make many tesla valves (or tesla barriers) which allow air (or water) to go only from the bottom to the top. At the top of the coil you can create some heat, putting some steel wool at the end of channel, or by turning on a small heater, or by covering with a blanket. Cold air will be attracted by heat at the top. If it's strong enough, it could spin a small pc fan. Now that we have a small fan, we can make the second stage, which means starting another spiral coil, next to the fan, with the pipe starting with a 40cm diameter and ending gradually with 10mm diameter, and this time the tesla valves won't be needed. This will be enough to move a bigger fan, which will be use for the third stage, with a bigger diameter. This in the end would become like an avalanche effect, the diameters and the fans will get bigger and bigger. Adavantages? You start from nothing, 3D printing everything, you can generate strong "indoor wind turbines", which would generate electricity without relying on wind.