Ep14 Surface Tension, Laplace Pressure, Capillary Forces NANO 202 UCSD

Surface tension, capillary rise in a tube, contact angle, Laplace pressure, capillary forces at contact. CORRECTION: In a few places, I left off the "m" as in the surface tension of water is 73 mJ/m^2, not J/m^2. Thus, the capillary rise in a 25 um tube is 4 cm, not 40 m.

[@domeniccipollone6817]

As a graduate student, these are extremely helpful videos. It is hard to find thorough explanations that are not hand-wavy even for topics like Laplace Pressure.

[@djlipomi]

Thanks Domenic!

[@monton206]

I have an exam on this chapter tomorrow and this was incredibly helpful! Its very clear that Dr. Lipomi is not only passionate about the subject, but passionate about teaching as well. Thank you!

[@djlipomi]

Thanks Jeffrey!!

[@lesliefanny]

thank you so much for this video.. one semester understood just because of your explanation, clear and cconcise... please upload more videos about this topics!!

[@natansavioli]

Great classes. Thank you

[@djlipomi]

Thanks!

[@thestemshed984]

What is the name and author of the book that was suggested at 2:00? Thank you.

[@pragyankumarsarma2064]

Capilarity and Wetting Phenomena a book by Pierre Giles de Gennes

[@Sean-up7qr]

Prof. Darren. I still don't understand what is the capillary force? Quere's book 'Capillary and wetting phenomena' says Capillary Force is as a force per unit length.(Page 4). But it's as same as the surface tension. So Surface tension=Capillary force? Is this right? I searched for this term on the Internet. But I can't find clear direct explanation, e.g. on Wikipedia. Just have many about capillary action. But researchers often use it in their papers. Can you explain it? And why you always mention it with Vander Waals force? Thank you very much.

[@zainsaad8979]

Jnhhlgv🚇🚇🚇🛹🤢🚏🚏🇼🇫🇼🇫

[@JoseLopez-si7nj]

Look out ¡ gamma=72.8x10-3 J/m^2, but neat lecture

[@djlipomi]

You're right! I left off the "m" for "mJ/m^2" in the calculation on the board.

[@zainsaad8979]

@@djlipomi glhhhjjjnnjmmmmm♥️🛣️🛣️🛣️👀🌳🌹

[@Bhooshan_Jape]

Dear sir thanks for the awesome lecture. Could you please suggest textbook reference for this lecture?

[@djlipomi]

Yup, the book on Capillarity and Wetting by de Gennes. www.amazon.com/Capillarity-Wetting-Phenomena-Bubbles-Pearls/dp/0387005927/ref=sr_1_3?keywords=pierre+gilles+de+gennes&qid=1639412901&sr=8-3

[@wolfie6175]

No derivation for an ellipsoid ;-; ?

[@zainsaad8979]

Hcca
H
Gvvn🎉😃