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A kind of fluid dynamic description for the collective movement of pedestrians is developed on the basis of a Boltzmann-like gaskinetic model. The differences between these pedestrian specific equations and those for ordinary fluids are worked out, for example concerning the mechanism of relaxation to equilibrium, the role of ``pressure'', the special influence of internal friction and the origin of ``temperature''. Some interesting results are derived that can be compared to real situations, for example the development of walking lanes and of pedestrian jams, the propagation of waves, and the behavior on a dance floor. Possible applications of the model to town- and traffic-planning are outlined.
Dirk Helbing (1998) studied this question.