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A coupled Boltzmann & Navier–Stokes fragmentation model induced by a fluid-particle-spring interaction? Pierre-Emmanuel Jabin & Juan Soler October 1, 2008 Abstract This paper is concerned with the modelling and analysis of the interaction between particles and fluids with particular regarding to fragmentation processes. We simplify the model by assuming that the particles are constituted by spheres jointed by springs. Then the aim is to deduce the terms appearing in the Navier–Stokes-type equations for the fluid and the counterpart influence in the Boltznmann system for the particles. The resulting coupled system is analysed by means of a refined averaging lemma. 1 Introduction and main results sec:intro Modeling complex multiphase fluids (two-phase fluids to fix the ideas) is an interesting problem which finds important applications in biotechnology, medicine, ecology, astrophysics, combustion theory or meteorology, such as the production of aerosols, sprays, polymers or diesel motors, for example, see []. The dynamics of the fluids is affected by their mutual interaction and may produce fragmentation or coagulation between the particles constitut- ing the fluids, which modifies the density or the velocity of them. There are different ways to model this situation, depending on the nature of the flu- ids, their densities and all relevant physical parameters. The so-called fully ?This work was partially supported by MEC (Spain), Proyecto MTM2005-02446.

- stokes problem
- particle
- navier–stokes system
- model induced
- particle-spring interaction?
- coagulation-fragmentation models
- spherical balls
- interaction between

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Published by | pefav |

Reads | 10 |

Language | English |

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