Does This Debunk the "Coolant Can Flow Through the Radiator Too Fast" Idea???

mopowers said

The best way for me to think about it is that heat transfer rates are not linear. The radiator dissipates more heat when the difference in temp between the coolant and ambient is greater. In other words, the sooner you can get the hot coolant to the radiator, the better. Plus there are diminishing returns the longer you keep the coolant in the radiator. Flow is your friend in this case.

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The engineering explanation is that there are multiple variables involved in engine cooling - flowrate, coolant properties (conductivity and heat capacity), temperature difference between metal parts and coolant, temperature difference between coolant and radiator tubes, heat convection from radiator tubes/fins to airflow. The later is the major bottle-neck in the series of heat flows. Most public with no science education can only think in terms of one variable affecting one outcome.