If you close your bedroom door and then close it again with the windows in the room open you may notice a big difference on how easily it swings shut
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Air pressure. Closing the door creates a small air pressure gradient. That has to go somewhere. It can go under and around the door, as well as other small orifices in the room or an open window. It is much easier for it to go through an open window, so it offers less resistance as the door is closing.
Air pressure. Closing the door creates a small air pressure gradient. That has to go somewhere. It can go under and around the door, as well as other small orifices in the room or an open window. It is much easier for it to go through an open window, so it offers less resistance as the door is closing.
In order for the door to close, it has to shove air out of the way.
If there’s an open window, it’s really easy for air to get shoved out of the room, so the door closes easily.
If the windows are all closed, the air “squishes” a little bit more as it’s being shoved, and you can feel that resistance.
In order for the door to close, it has to shove air out of the way.
If there’s an open window, it’s really easy for air to get shoved out of the room, so the door closes easily.
If the windows are all closed, the air “squishes” a little bit more as it’s being shoved, and you can feel that resistance.
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