Inside the crucible - what IS going on in there? - Forum

Seems like a while since we've discussed what we think, speculate, or "know" happens inside the portafilter basket during the various stages of extraction. A bit of this has come up in another discussion:
http://www.baristaexchange.com/forum/topics/ideal-tamper-base-shape-for-a
however it seems like a more thorough discussion can occur if we break away from that original question. Some good stuff put up over there, so you should definitely read it if you haven't already.

So, what do you think is going on in there?

(note: I will ask one favor... let's approach this neutrally, scientifically, and skeptically. I'm pretty sure that we do not actually know exactly what is happening in there... we have developed some really good theories to explain what is happening, have made observations that support them, and have made other observations that may not be fully explained. So let's approach the subject in that way - submitting what you suspect is happening in there and sharing any supporting evidence you may have.)

Also, if you happen to have any links to other discussions that you feel have covered this well, please share them. I don't get out as much as I should...

Ok, geek on...

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