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Chair of Ceramics

Main Research

09/07/2011

Application of Computational Fluid Dynamics at the chair of ceramics

Computer simulations are applied for investigations of complex systems for which simple closed form analytic solutions are not possible. To gain insight into the operation of those systems a simplified model is required. Numerical methods enable the prediction of the behaviour of the model from a set of parameters and initial conditions. Based on results of the computer simulations conclusions for the real system can be drawn.

A main effort of the chair of ceramics is to clarify wear mechanisms of refractories. Refractories are used to prevent the steel shell of furnaces and aggregates form high temperatures. In high-temperature processes melts and slags occur. In addition to the thermo-mechanical load the refractory has to withstand the chemical attack of these liquid substances. Thereby the concurrent wear mechanisms are affected by the fluid dynamics of the melts and slags within the aggregate. To investigate this influence of the fluid flow CFD-simulations (computational fluid dynamics) are applied for example in the case of the laboratory rotary kiln that is used to determine the slagging resistance of refractories.

Fig.: Velocity vectors of air (blue) and slag (magenta) in the laboratory rotary kiln for different time steps