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Young massive clusters (YMCs) are recently formed astronomical objects withunusually high star formation rates. We propose the collision of giantmolecular clouds (GMCs) as a likely formation mechanism of YMCs, consistentwith the YMC conveyor-belt formation mode concluded by other authors. Weconducted smoothed particle hydrodynamical simulations of cloud-cloudcollisions and explored the effect of the clouds' collision speed, initialcloud density, and the level of cloud turbulence on the global star formationrate and the properties of the clusters formed from the collision. We show thatgreater collision speed, greater initial cloud density and lower turbulenceincrease the overall star formation rate and produce clusters with greatercluster mass. In general, collisions with relative velocity $\gtrsim 25$ km/s,initial cloud density $\gtrsim 250$ cm$^{-3}$, and turbulence of $\approx 2.5$km/s can produce massive clusters with properties resembling the observed MilkyWay YMCs.

The role of collision speed, cloud density, and turbulence in the formation of young massive clusters via cloud-cloud collisions