Abstract: An apparatus for mixing fluids can provide at least three times a volumetric flow of a volumetric flow rate of a pump to have a specific volumetric flow rate. The apparatus can include a mixing housing, an inner cavity, and an inlet nozzle adjacent a first end of the mixing housing and at least partially extending into the inner cavity. The apparatus can also include a radial inlet formed through a portion of the mixing housing and an outlet adjacent a second end of the mixing housing. The apparatus can form a portion of a system for mixing fluids, separating fluids, or both.