NOVELTY - Rotary pump (1) comprises a rotor arranged in a closed pump housing that is in operative connection with a drive for pumping a fluid (4). The pump housing has an inlet opening (6) for the intake of the fluid into the pump housing and an outlet opening (7) for conveying the fluid out of the pump housing into a storage container (8) that is partially filled with the fluid. The outlet opening is arranged in a way that the fluid can be supplied from the pump housing through the outlet opening to the storage container directly and free of ducting.    USE - The rotary pump is used for in hydrodynamic mixer; for processing of fluids (e.g., suspensions or slurry) in CMP process in a wafer production or in the production of a computer hard drive; for circulating, mixing and/or pumping of the suspension in a storage container; for dissolving and/or mixing of a powder with a fluid; for manufacturing emulsions; and/or for through mixing and/or aerating of a bioreactor (claimed).    ADVANTAGE - The outlet openings discharge directly into the storage container, i.e. the fluid is conveyed out of the interior of the pump housing through the outlet openings directly into the storage container for the through mixing of the fluid located in the storage container, without a different use of the flow of fluid being possible on the path of the fluid from the interior of the pump housing via the outlet openings into the storage container. The flow of fluid out of the interior of the pump housing through the outlet openings into the storage containers serves exclusively for the through mixing of the fluid in the storage container.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) hydrodynamic mixer (100) comprising a storage container for receiving a fluid to be mixed, and the rotary pump; and    (2) use of the rotary pump for the processing of fluids, e.g. suspensions or slurry in a chemical mechanical polishing (CMP) process in a wafer production or in the production of a computer hard drive, for the circulation, mixing and/or pumping of the suspension in a storage container, for dissolving and/or mixing of a powder with a fluid, for the manufacture of emulsions, and/or for through mixing and/or aerating of a bioreactor.    DESCRIPTION OF DRAWING(S) - The figure is a storage container with a rotary pump.    Rotary pump (1)    Fluid (4)    Inlet opening (6)    Outlet opening (7)    Storage container (8)    Hydrodynamic mixer (100)