Motivated by experiments on cell segregation, we present a twospecies
model of interacting particles, aiming at a quantitative description of
this phenomenon. Under precise scaling hypothesis, we derive from the microscopic
model a macroscopic one and we analyze it. In particular, we determine
the range of parameters for which segregation is expected. We compare our
analytical results and numerical simulations of the macroscopic model to direct
simulations of the particles, and comment on possible links with experiments.