Turbulent Flow

Heat Dissipation

Swirling motion in the water breaks up the stagnant layer that normally forms against the channel walls. This mixing brings fresh, cold water into contact with the hot surface and carries energy away much faster. Improved cooling reduces the time the part must stay in the mold.

Reynolds Number

The transition from smooth to chaotic flow happens when the velocity of the water reaches a specific threshold. A value above four thousand is typically required to ensure that the flow is fully developed and effective. Engineers select pump sizes and pipe diameters to maintain this level across all cooling circuits.

Cooling Speed

Higher flow rates allow for more uniform temperatures throughout the tool. This consistency prevents hotspots that can lead to part defects like sink marks or uneven shrinkage. Maintaining a turbulent regime is a cost-effective way to improve the productivity of an existing mold.