The experimental results of dependence of black fragment azimuth (ϕ) and projected angle (ψ) distributions on polar angle θ in silicon-emulsion collisions at 4.5 A GeV∕ c (the Dubna momentum) are reported. There are two regions of enhancement around ϕ=±90 for different θ ranges. These enhancements are due to directed (v 1) and elliptic (v 2) flows. The v 1 and v 2 dependence of values on θ shows that the directed flow is weak and the elliptic flow is strong in these collisions. A multisource ideal gas model is used to describe the experimental results of dependence. The Monte Carlo calculated results are approximately in agreement with the experimental data.