Radiator

the simple answser is yes. a radiator will slow circulation. the thermostat is designed to slow water flow. the hot water needs time to cool in the radiator. measure the differential between the intake tempature and the outflow to determine efficency.

How does the coolant fluid circulate if the radiator is not installed?

What is the point of running the engine if the radiator is disconnected?

i only wanted to ask if the coolant pump flow rate changes while testing with and without restriction and which flow to consider while specifying flow rate of coolant inside radiator...

Is this an engine design job, then?

not a design job...i required it just for my understanding...

OK. Well, most engines have a coolant circulating pump, the speed of which is related to the engine speed, so, while the engine runs faster, the coolant circulates at a higher rate.

All internal combustion engines fitted with pumped coolant have a radiator that is subjected to an air flow; with an engine on a vehicle, the air flow is ducted around the radiator by virtue of the vehicle's motion, and the cooling effect increases with vehicle speed. Many engines have a supplementary fan that forces air past the radiator while the coolant is at high temperature and the vehicle is stationary, and most, if not all fixed engine installations have this feature as well.

Clearly, the radiator and the coolant circulating system have to be designed to get rid of the waste heat at a suitable rate, and this is often determined by testing the actual unit in controlled conditions.

Does that answer the question?

yes..thank you

yes

you just answered your own question. restriction? of course it will

Flow rate is restricted by the thermostat. If you remove the radiator from the system there would be no cooling of the coolant. The thermostat would open all the way flow rate would be at a maximum. There is more restriction of the coolant in the system from the thermostat then the radiator.

I may be wrong but I thought the purpose of the thermostat was to maintain a specified temperature of the engine under normal driving conditions and to aid in faster warm-up during the winter months.

I had never heard that the thermostat was an aid to cooling the water by restricting the flow so coolant could stay in the radiator longer.

a therostat is designed to do both. water resiction is controlled by the the diameter of the "pellet" that opens a hole in the thermostat at a pre-determind temperature. the the larger the pellet, the larger the restriction hole.

Ah - Thank you for the clarification!