Constraining neutrino mass remains an elusive challenge in current physics and astronomy. Precision measurements are expected from several upcoming cosmological probes of large-scale structure. Achieving this goal relies on an equal level of precision from theoretical predictions of neutrino clustering. Numerical simulations of the non-linear evolution of cold dark matter and neutrinos play a pivotal role in this process. We run the world’s largest cosmological N-body simulation, named TianNu, which coevolved just under 3 trillion CDM and neutrino particles on Tianhe-2(Galaxy-2) supercomputer. Based on TianNu data, we discover the differential neutrino condensation effect and the dipole in real space using the simulation density and velocity fields. In addition, we also provide details of our production run, which uses 86% of the machine (13,824 compute nodes), and a discussion of the unanticipated computational challenges that were encountered during the TianNu runtime.