Methods and devices for mixing fluids

A method for mixing fluids, comprising:

• flowing two or more fluids toward one another through two annular passages positioned apart along an exterior surface of a cylinder, thereby creating two three-dimensional annular fluid streams flowing toward one another along the exterior surface of the cylinder;
• and
• colliding the two annular fluid streams head-on along the exterior surface of the cylinder, thereby merging the two annular fluid streams into one flat two-dimensional fluid stream flowing in a direction substantially perpendicular to the exterior surface of the cylinder, where the merging of the two annular fluid streams causes one or more of:
• compression-tension deformation, vorticity, and/or low pressure, along the flat two-dimensional fluid stream and produces cavitation bubbles.

A method for mixing fluids, comprising:

• creating two hollow bodies of fluid by flowing each of two fluids toward one another through separate center-plugged orifices, the separate center-plugged orifices positioned apart from one another along a lateral exterior surface of an elongated body, the two hollow bodies of fluid longitudinally aligned along a longitudinal axis of the elongated body;
• flowing the two hollow bodies of fluid directly toward one another along the lateral exterior surface of the elongated body;
• and
• impinging the two hollow bodies of fluid along the lateral exterior surface of the elongated body, thereby directing a film of fluid substantially radially outward from the longitudinal axis of the elongated body, and creating areas of low pressure and cavitation bubbles within an area including an impingement zone.

A device for mixing fluids, comprising:

• structure including two circular openings having substantially the same diameter, the circular openings being spaced-apart and coaxial with each other;
• a cylindrical shaft coaxially positioned through the circular openings to form two annular openings spaced-apart along a length of the cylindrical shaft, the annular openings configured to create two hollow cylindrical fluid jets flowing directly toward one another along a lateral external surface of the cylindrical shaft when fluids are flowed through each annular opening in a direction toward a center of the cylindrical shaft;
• and
• a mixing chamber in fluid communication with the two annular openings, the mixing chamber surrounding at least the length of the cylindrical shaft spaced between the two annular openings, for enclosing the two hollow cylindrical fluid jets and a radial stream flowing outward from the lateral external surface of the cylindrical shaft that results from impingement of the two hollow cylindrical fluid jets flowing directly toward one another.