Magnetic stirring apparatus for precise fluid management and fluid dynamics control

A method of providing consistent stirring of fluid, the method comprising the steps of:

• providing a plurality of vessels, each containing a magnetic stir bar configured to rotate about a rotational axis, wherein the magnetic stir bar is capable of spinning on a tilted axis to a stirring axis of a magnetic stir plate, wherein the magnetic stir plate has only one driver magnet;
• positioning the vessels containing the magnetic stir bars on the magnetic stir plate, wherein the vessels are arranged anywhere within an operational range of the driver magnet contained within the magnetic stir plate;
• powering on the magnetic stir plate to rotate the driver magnet about the stirring axis, thereby inducing a uniform rotation behavior of the magnetic stir bars in their respective vessels within an entirety of effective area of the driver magnet, wherein
• each magnetic stir bar rotates about the rotational axis, wherein the rotational axis and the stirring axis are not colinear;
• generating a mixed-flow pattern within each vessel across the magnetic stir plate, wherein
• the rotation of each magnetic stir bar does not interfere with the rotation of other magnetic stir bars in the adjacent vessels, allowing for simultaneous, consistent, and multi-vessel stirring across multiple vessels positioned on the same magnetic stir plate;
• and
• stirring the fluid in such a way as to inhibit the formation of vortices within the fluid, wherein each magnetic stir bar is configured for stable behavior while exceeding a rotational speed about the rotational axis above about 600 RPM while undergoing a secondary rotational movement about the stirring axis.

A magnetic stir bar comprising:

• a core, the core having a head and a tail, wherein the head and tail are on opposite ends of the core, and wherein the head and tail are closed at their respective ends;
• a rotational axis, wherein the rotational axis runs along the center of the core, running through the head and the tail;
• at least one magnet, wherein the at least one magnet is located within the core,
• wherein the at least one magnet is designed to couple with a driver magnet of a magnetic stir plate;
• a stirring axis, wherein the stirring axis runs orthogonal to the rotation of the driver magnet, wherein the stirring axis and the rotational axis are not collinear and not parallel,
• wherein the angle between the rotational axis and the stirring axis is from about 22° to about 65°;
• and
• two or more oriented blades connected to the core, wherein the orientation of the two or more oriented blades is either left-handed or right-handed, wherein the two or more oriented blades have an intake zone, a transport zone, and a discharge zone, wherein the transport zone is situated between the intake zone and the discharge zone, wherein
• an angle between the intake zone of each of the two or more oriented blades and the rotational axis is in the range of about 30° to about 60° or about −30° to about −60°;
• an angle between the transport zone of each of the two or more oriented blades and the rotational axis is in the range of about 37° to about 65° or about −37° to about −65°;
• and
• an angle between the discharge zone of each of the two or more oriented blades and the rotational axis is in the range of about 45° to about 70° or about −45° to about −70°;
• the core further comprises a ballast, wherein the ballast is made of a ferromagnetic material that does not interfere with the magnetic stir bar's magnetic coupling to the driver magnet during operation;
• the two or more oriented blades have a variable pitch along their length;
• and
• the variable pitch of each of the two or more oriented blades is independently configurable, wherein the magnetic stir bar is configured for stable behavior while exceeding a rotational speed about the rotational axis above about 600 RPM while undergoing a secondary rotational movement about the stirring axis.