Temperature increase after increasing flowrate

Hello community,

I am modelling a liquid cooling network which i will parameterize based on a real liquid cooling network that i built.

It consistis of a pump, radiator, reservoir and a cooler element beside the tubing and all additional sensors.

In that particular scenario, the pump is turned on after 10 minutes and reaches it full flowrate after 10 seconds, from there it is constantly working till stop.

The cooler is modelled as a tube element hooked up to a thermal network which is applying 10W of power. The simple tubes before and after should modell the natural convection that i see in the real measurements while powering the heater and keeping the pump turned off.

If the pump is turned on at 600s, we can see a temperatue increase in the sensor located after the cooler which i cannot see in the real measurements and rather looks like the decreasing cooler surface temperature.

I would like to understand how this behavior is created and if possible how to avoid it. I can imagine that at the port of the temperature sensor, after the liquid was heated for that time, that the mass of the liquid inside the cooler is virtually passing the temperature sensor and it taking some time to cool down to average coolant temperature. But as a novice in Simscape Modelling I am having a hard time understanding the mechanisms behind that.

I greatly appreciate any suggestion and explanations from you, looking forward to it. Thanks much!

[Neelanshu]

Hi Jan,

Kindly please share the SLX file of the model. This will greatly assist in resolving the issue effectively.