The description of the hydrodynamics of gas-solid suspensions through a fundamental model is the aim of this research. A model, which can predict the behaviour of particle-gas suspensions in circulating fluidised beds and inclined ducts, has been already developed. In some circumstances granular materials can be treated as a continuum and continuous equations can be written to describe their behaviour. Main aim is to understand the mechanical response of granular materials to imposed kinematics, i.e., the identification of their rheological behaviour. Granular material is assumed to be a compressible fluid and procedures, borrowed from classical gas dynamics, are utilised for a description of basic problems as waves propagation.
Waves propagation is an important phenomenon to understand stability of fluidised beds.
The present study is intended to extend available theories incorporating interstitial fluid effects. The goal is to model the observed kinetic and thermodynamic behaviours of mixture of many components which undergo chemical reactions of similar nature. Some general problems have been solved through a very successful technique of lumping. Future plans are concerned with attacking a couple of problems which are still unsolved, namely lumping of biochemical systems and catalytic cracking of oil cuts. The description of the hydrodynamics of gas-solid suspensions using a fundamental model is the aim of this research.