SPP 1423: Process-Spray: Functionalised Solid Particles from Spray Processes - From Powder Property Demands to Tailored Spray Processes and Feed Control

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For the production of solid particles and powders the process industry increasingly employs atomisation and spray techniques. Knowledge of the fundamental principles and mechanisms of process integrated spray technologies is relatively coarse, therefore this joint Priority Programme has been initiated. The participating research groups are from engineering disciplines as process and particle technology, fluid mechanics and physical chemistry, pharmaceutical or metall-powder technics. The aimed gain of fundamental knowledge is intended to be used in technical applications of spray processes. The research approach of the joint Priority Programme uses innovative methods and processes in atomisation and spray technology for the derivation of the description of transport- and transfer-processes in dense, concentrated multiphase systems for the generation of solid particles in sprays. Actual developments and achievements in process integrated measurements technologies for multiphase systems and processes in combination with advanced, recently developed modelling and simulation techniques allow the approach, analysis and description of the fundamental processes in atomisation and sprays. These achievements in combination with the industrial demand for particles and powders having very specific properties (as composition, size and shape, flowability and others) necessitate a multi disciplinary cooperation for analysis and modelling of particle generation in spray processes. The atomisation liquids typically involved for particle production are complex multiphase rheological systems as e.g. a suspension or emulsion. These boundary conditions reflect the challenging research programme for establishing and development of specific spray processes for particle production, but also reflect the huge possibilities and potentials for the development of innovative and new powders. From the process to system configuration in this approach technical expertise for the development of tailor-made dispersed systems is expected. In the frame of the Priority Programme finally a recursive design approach is expected to be derived, where from the user claimed particle properties the requirement profile for the disintegration and atomisation process as well as for the spray process is defined. The technical application of the derived findings in the form of realisation of adapted atomisation facilities and plants for spray made particles is the focus point of the research programme.