Fluid processing apparatus and processing method

A fluid processing apparatus for processing at least two kinds of fluids including a first fluid and a second fluid, wherein at least one kind of the at least two kinds of fluids contains at least one kind of materials to be processed, the fluid processing apparatus comprising:

• at least two processing members including opposing processing surfaces, the at least two processing members being capable of approaching to and separating from each other, at least one of the at least two processing members rotating relative to the other, wherein a depression is arranged on at least one of the opposing processing surfaces from inside to outside of the radial direction of the at least one of the opposing processing surfaces and is configured to receive a first fluid by a micropump effect via a first flow path, and a second flow path that is independent of the first flow path for introducing the first fluid is configured to receive the second fluid and is provided with an opening leading between the processing surfaces, whereby the processing of the fluids is done by mixing and stirring between the processing surfaces,
• wherein:
• an introducing direction from the opening of the second flow path into the processing surfaces is inclined relative to the processing surfaces,
• the micropump effect produces an effect such that a force is generated in the direction of separating the processing surfaces from each other by rotating at least one of the opposing processing surfaces provided with the depression,
• the opening in the second flow path is arranged at a position nearer to an outer diameter of the processing surfaces than a position where a direction of the first fluid introduced by the micropump effect from the depression arranged on at least one of the opposing processing surfaces is converted into a direction of a spiral laminar flow formed between the processing surfaces,
• the opening is arranged radially outward, from an axis of rotation of the at least one processing member, of an outermost end of the depression and apart from the outermost end of the depression, and
• the introduction direction of the second fluid from the opening to the processing surfaces is inclined at more than 0° and less than 90°, relative to the processing surfaces.