In a vacuum environment where does the force come from that is exerted to fill that void. If there isn't anything there why would there be a force, or should I say energy present. It is exerted on surrounding elements, all driven to the center. It doesn't work like gravitational pull, the heavier elements sink to the bottom. In a vacuum that is filled It will tend towards equilibrium. I think I posted this in the right section.

What kind of vacuum are you considering here? You can't create a true vacuum, with absolutely nothing on it. You can evacuate it of some large fraction of the atoms, but there will still be zero-point energy left, which is responsible for the Casimir force. However, I don't know what you mean by a force that drives things to the center, or a vacuum that is filled. A filled vacuum seems to be an oxymoron.

I interpret your question to be "why does air rush in to a space which previously was a vucuum". Simple. It's the pressure of of the air pushing from the outside, not some "force" within the void which sucks!