this post was submitted on 10 Dec 2024
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Water warmed in a kettle has much more even temperature in all points, which affects the brewing process. Generally, the more even the temperature is, the more consistent and rich is your brew.
I would consider microwave boiling as a makeshift method to produce a mediocre result when you need it anyway, not as a daily driver.
I'm asking this from a place of genuine ignorance: how does the evenness of the heat distribution matter when microwaving a pure liquid? I'm familiar with the microwave's uneven heating qualities. I'm sure we've all bit into food that is scalding hot on the surface and still lukewarm at best in its interior. However, I've always presumed that is a product of microwaving a heterogenous, predominantly solid substance.
So, sure, the microwave applies heat unevenly to the water. But wouldn't the tiny little bits of water which get "over" heated simply diffuse their excess thermal energy into the rest of the homogenous volume in very short order? Furthermore,wouldn't an uneven heat distribution in a mug of water simply lead to convection currents flowing from hot to cold, therefore promoting a relatively even distribution?
How does a kettle warm the water more evenly but a microwave doesn’t? When a kettle has it’s heating element only at the bottom but a microwave blasts the entire mass of water with energy because it sits on a rotating plate.
Exactly because of that.
Hot water moves upwards, and if you heat it from the bottom, you get a more even result than if you blast it from all sides.
Cold water falls to the bottom of a kettle and boils on the bottom. Microwaves can miss the bottom, possibly?
Boiling water mixes itself, also: no