A centrifuge rotor having a curved shape is offset on a spinning rotor base and creates contiguous areas of low to high centrifugal force depending on the distances from the axis of the rotor base and a method of separating components in a fluid based upon a difference in density of the components, the method comprising the steps of providing to a rotor as described herein the fluid containing the mixed together components to be separated based upon the difference in density of the mixed together components； continuously flowing the components in the fluid to the rotor through an input tube connected to the input port while the rotor is spinning about a centrifugal axis of rotation； separating the components in the fluid into fractions based upon the difference in density of the mixed together components with the use of centrifugal force when the rotor is spinning； collecting components having i) a first density via a first tube connected to the output port at the first end on the rotor, ii) a second density via a second tube connected to the output port at the second end on the rotor, iii) a third density via a third tube connected to the output port at the junction on the rotor and iv) a fourth density via a fourth tube connected to the output port between the input port and the output port at the first end.
