Abstract (EN):
Stochastic properties of systems formed by many passive particles conducted by four vertices, each one with positive circulation, are investigated. A statistical chi(2) test is developed in order to study the spatial distribution of particles in the chaotic background (lambda(L) > 0). The fact that the uniform distribution is an invariant measure of the spatial distribution of particles is used to debug the chi(2) test. This procedure is applied in the same conditions as described in Babiano et al. in order to study the uniformity of passive particles. It is observed that uniformity is not attained up to times of order 10(5) natural time unity, when either a Gaussian or a uniform initial distribution is considered in a small region away from the vortices.
Language:
English
Type (Professor's evaluation):
Scientific
No. of pages:
3