Supersonic Spray Advanced Modelling - SSAM
Dr. Rocco Lupoi
Tel: +353 1 896 1729
Mr. Morten Meyer
Tel: +353 1 896 3431
Cold Spray (CS) is a coating and additive manufacturing technology that involves the high kinetic energy impact of particles onto substrates below melting temperatures (see a detailed a description here). The improvement of CS makes a profound understanding of the flow inevitable. The efficiency of the material deposition is mainly influenced by the speed and temperature of impacting particles. Those quantities are results of many complex interacting processes during the acceleration within the nozzle, such as:
- Extreme changes of flow properties
- Compressibility effects
- Flow stability and turbulence
- Phase interaction mechanisms
The ability to control these aspects is highly important for the control of deposition, which firstly motivates a detailed computational description of the process. Nonetheless, the numerical modelling of such multiphase flows is challenging. Conventional methods either represent an insufficient set of physical properties or their validity is inherently restricted to special cases due to basic assumptions.
This project hence aims to develop, validate, and optimise a Computational Fluid Dynamics (CFD) environment that enables the prediction of the main CS process parameters with respect to the apparatus design and the set-up conditions. In this concern, a major task is an adequate treatment of the particulate phase in the distinct regions of the flow field under varying conditions.