Red Bull's exhaust/tunnel solution could work for Ferrari, but not necessarily because it "stalls" the beam wing or anything else, for that matter.
McCabism wrote:[...]
The underpass is fed by the flow along the flanks of the sidepods, which in turn is fed by the front-wing wake. By connecting the flow along the flanks of the sidepods to the low pressure area under the beam wing, the underpass not only assists with rear downforce, but also pulls the air faster over the front-wing.
[...]
If Red Bull's solution does indeed create a sort of low pressure area that pulls air flow over the front wing, I think it could potentially help the F2012 a great deal if it's implemented. Based on the experimentation they've done with various front wings, barge board vortex generators and the like...
...I think it's pretty clear they're having problems with flow around the sidepods, which creates all sorts of issues. It creates drag in the form of high pressure at the sidepod inlets; it chokes air flow to the "Coke bottle," which then robs the rear wing, beam wing and the top of the diffuser of air flow (downforce); and it reduces the efficiency of the front wing. In other words, it's a real pain in the ass.
Granted, this is just speculation on my part. But, if the team can do something to restore clean flow around the sidepods, the car's pace could pick up. It might even unlock performance from all those updates that never seemed to work when they were introduced.
Then again, it may not work at all. Ever. Who knows?