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theonlymagicleftisart:

(Andrea Buia)

theonlymagicleftisart:

(Andrea Buia)

1 year ago | J | 358 notes

science-junkie:

Non-Newtonian Fluid

The resistance which arises from the lack of slipperiness of the parts of the liquid, other things being equal, is proportional to the velocity with which the parts of the liquid are separated from one another. —Isaac Newton


Sir Isaac Newton described how liquids behave. Today, we call this description Newton’s Law of Viscosity, and it describes how fluids move in response to stress. Take a straw in a glass of water as an example. Suck on the straw, and you pull water from the glass. Suck harder, and the water moves faster. Its viscosity, or resistance to flow, doesn’t change: Everything’s in proportion. Fluids that follow the law of viscosity are Newtonian fluids.

A non-Newtonian fluid is a fluid whose viscosity is variable based on applied stress. 

If you punch a bucket full of a shear thickening non-Newtonian fluid [e.g. cornstarch dispersed into water*], the stress introduced by the incoming force causes the atoms in the fluid to rearrange such that it behaves like a solid. Your hand will not go through. If you shove your hand into the fluid slowly, however, it will penetrate successfully. If you pull your hand out abruptly, it will again behave like a solid, and you can literally pull a bucket of the fluid out of its container in this way.

A shear thinning non-Newtonian fluid behaves in the opposite way. In this type, the fluid becomes thinner, rather than thicker, when stress is applied. Also called pseudoplastic, examples of this type of non-Newtonian fluid include ketchup, [wall paint and blood].

When combined with a oscillating plate, non-Newtonian fluids demonstrate other unusual properties, like protruding “fingers” and holes that persist after creating them. An oscillating plate applies stress on a periodic basis, rapidly changing the viscosity of the fluid and putting it in an odd middle ground between a liquid and a solid.

*Non-Newtonian Cornstarch Recipe.


Sources: youtube.com dsc.discovery.com -  wisegeek.com.

1 year ago | J | 1,525 notes
1 year ago | J | 28 notes
cardboardcities:

‘selene and eos’ 
© cardboardcities 2012
prints, iphone cases, tshirts and more available here

cardboardcities:

‘selene and eos’ 

© cardboardcities 2012

prints, iphone cases, tshirts and more available here

1 year ago | J | 338 notes
woodendreams:

(by Kristina_Wilson)

woodendreams:

(by Kristina_Wilson)

1 year ago | J | 3,029 notes
lensblr-network:

Photographer: Visioluxus
Model: Ammalynn
by ammalynnsvisage.tumblr.com

lensblr-network:

Photographer: Visioluxus

Model: Ammalynn

1 year ago | J | 227 notes
travelingcolors:

Infrared St. Francis | Wisconsin (by Retinal Fetish)

travelingcolors:

Infrared St. Francis | Wisconsin (by Retinal Fetish)

1 year ago | J | 8,539 notes
saitamanodoruji:

Amazon: 杉浦茂傑作漫画選集 0人間 (復刻名作漫画シリーズ) [コミック]: 杉浦 茂

saitamanodoruji:

Amazon: 杉浦茂傑作漫画選集 0人間 (復刻名作漫画シリーズ) [コミック]: 杉浦 茂

1 year ago | J | 162 notes
1 year ago | J | 4,311 notes
1 year ago | J | 6,315 notes