Chemotaxis: from kinetic equations to aggregate dynamics - Archive ouverte HAL
Pré-Publication, Document De Travail Année : 2011

Chemotaxis: from kinetic equations to aggregate dynamics

Résumé

The hydrodynamic limit for a kinetic model of chemotaxis is investigated. The limit equation is a non local conservation law, for which finite time blow-up occurs, giving rise to measure-valued solutions and discontinuous velocities. An adaptation of the notion of duality solutions, introduced for linear equations with discontinuous coefficients, leads to an existence result. Uniqueness is obtained through a precise definition of the nonlinear flux as well as the complete dynamics of aggregates, i.e. combinations of Dirac masses. Finally a particle method is used to build an adapted numerical scheme.
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Dates et versions

hal-00605479 , version 1 (01-07-2011)
hal-00605479 , version 2 (04-07-2011)
hal-00605479 , version 3 (02-12-2011)

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  • HAL Id : hal-00605479 , version 1

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François James, Nicolas Vauchelet. Chemotaxis: from kinetic equations to aggregate dynamics. 2011. ⟨hal-00605479v1⟩
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