Is directional gas flow possible in a circular closed pipe system?

[eindoofus]

If I have a series of pipes and containers (containing liquid) soldered together to create a circular path, and then heated at a particular point or multiple points, is it possible to somehow have the gas move in a particular direction without the gas every leaving the system? I'd prefer not to use any extra devices.

 

[ModusPwnd]

This comes to mind, Its not circular, but similar to what you want.

http://en.wikipedia.org/wiki/Stirling_engine

 

[eindoofus]

That would work, thanks!