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Cambridge Math Goes Viral With Simple Method Promising to Cool Your Car Quickly Without Air Conditioning, Just With Windows and Doors.
On the hottest days of the year, getting into a closed car can feel like stepping into an oven. However, a tip shared by an American math teacher has gone viral on social media with a practical and different solution to cool your car down.
She assures that it is possible to refresh the vehicle quickly without relying on air conditioning — and the trick is based on science.
The Power of Fluid Dynamics to Cool the Car
Hannah Fry, a professor at the University of Cambridge, used her Instagram profile to explain the method to cool your car.
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She has about 1.3 million followers and is known for popularizing mathematical and scientific concepts in everyday life.
According to Fry, the idea is to use fluid dynamics, a field that studies the movement of air and water, to create a current of air that pushes the accumulated heat out of the car.
“This is the trick I keep using,” the professor stated. “This is what I’m doing my PhD on: fluid dynamics.”
Step by Step of the Method
The technique involves the strategic use of windows and doors. The first step is to lower just one of the back windows of the car.
Then, on the opposite side, the driver should open and close the front door rapidly several times.
For example: lower the window behind the driver’s seat and open and close the front passenger door with firm movements.
This creates a forced airflow that pushes the hot air out and pulls cooler air from outside in.
“When you open and close the door, it sweeps all the air that is already in the car,” Fry explained. The effect creates a low-pressure zone, replacing the stale air with a lighter and more pleasant breeze.
It Works at Home Too
Although presented as a trick for cars, many internet users reported that they use the same technique at home.
The idea is to create an airflow between windows and doors, moving the hot air outside.
In the comments of the video, several people stated that they already put the method into practice in their daily lives.
One user said they use the trick in their room, aided by a towel to circulate the air. Another mentioned that they and their spouse open and close the house doors in sync to expel the accumulated heat.
According to the website Motor1, based on data from Marvin Replacement, different types of windows can also contribute to ventilation.
Double-hung windows, for instance, help push hot air out.
Casement windows better catch side breezes, and sliding windows allow greater control over airflow.
Bay windows and balcony windows also help, thanks to their wider panels.
Technical Advice for Summer
In addition to practical tricks like Hannah Fry’s, experts recommend preparing the car for heat with preventive maintenance.
According to them, the first measure is to conduct a complete inspection of the vehicle.
The technician should check systems such as brakes, power steering, front and rear suspension, as well as check the battery and the levels of essential fluids.
Another key aspect is the cooling system, responsible for controlling the engine temperature. Before the heat increases, it’s necessary to check the level and condition of the coolant, as well as inspect the hoses and radiator.
The air conditioning system should also be reviewed.
Watch Out for the Tires
Tires used in winter can wear out easily in hotter climates. Therefore, experts advise that drivers replace specific tires with all-season or summer-specific models.
The tread depth also needs to be evaluated. Worn tires can compromise braking and increase the risk of accidents.
External Protection Matters Too
Exposure to strong sunlight can damage the car’s paint. Therefore, the ideal approach is to perform a thorough cleaning and apply a coat of wax before summer starts.
Many dealerships offer detailing and washing services. In addition to preserving aesthetics, this protection helps prevent wear caused by UV rays and dirt accumulated over the winter.
An Affordable Solution
Hannah Fry’s trick may seem strange at first glance — after all, it involves opening and closing doors in public. But, according to her and her followers, it’s worth it.
“You look like an idiot who doesn’t know how to use a door,” Fry joked in the video. “But it’s effective.”
And for those who don’t want to rely on air conditioning or are still waiting for system maintenance, the tip can provide immediate relief on the hottest days.
