A static mixer including first, second, and third chambers arranged in flow sequence. Nozzles extend from the first chamber through the second chamber to matching orifices in a wall between the second and third chambers. A first fluid to be is forced through the nozzles, and a second fluid is entered into the second chamber. As the first fluid exits the nozzles, a Bernoulli aspiration effect is created at the nozzle outlet, entraining second fluid from the second chamber. The fluids are turbulently mixed, providing a homogeneous fluid mixture in the third chamber. Fluid pressure in the second chamber may be less than the pressure in either the first or third chambers. The mixer is especially useful in a solid oxide fuel cell system. A plurality of small individual Bernoulli aspirators may be packaged in a small mixer housing, providing excellent mixing with little pressure drop through the apparatus.