Low speed gas flows are studied using a Unified Flow Solver (UFS) that automatically selects continuum-fluiddynamic and kinetic solvers for near-equilibrium and kinetic domains. Direct Numerical Solution of the Boltzmann equation is used in the kinetic domains at moderate and high local Knudsen number, while kinetic schemes for Euler or Navier Stokes equations are used in the continuum domains....

Direct photon emission in heavy-ion collisions is calculated within the relativistic microscopic transport model UrQMD. We compare the results from the pure transport calculation to a hybrid-model calculation, where the high-density part of the evolution is replaced by an ideal 3-dimensional fluiddynamic calculation. The effects of viscosity, present in the transport model but neglected in idea...

We present a car traffic simulation prototype for complex networks, that is formed by a collection of roads and junctions. Traffic load evolution is described by a model based on fluid dynamic conservation laws, deduced from conservation of the number of cars. The model contains some additional hypothesis in order to reproduce specific car traffic features such as route based car distribution a...