  We investigate the statistical properties of cosmic baryon fluid in the
nonlinear regime, which is crucial for understanding the large-scale structure
formation of the universe. With the hydrodynamic simulation sample of the
Universe in the cold dark matter model with a cosmological constant, we show
that the intermittency of the velocity field of cosmic baryon fluid at redshift
z=0 in the scale range from the Jeans length to about 16 Mpc/h can be extremely
well described by She-Leveque's universal scaling formula. The baryon fluid
also possesses the following features: (1) for volume weight statistics, the
dissipative structures are dominated by sheets, and (2) the relation between
the intensities of fluctuations is hierarchical. These results imply that the
evolution of highly evolved cosmic baryon fluid is similar to a fully developed
turbulence.
