Non-Newtonian fluid, the harder you press, the harder it gets
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Non-Newtonian fluid, the harder you press, the harder it gets v.redd.it/ovit72dkpxu51
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Non-Newtonian fluids turn into solids when pressure is applied. v.redd.it/yovso62qv3u51
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Volcanic ash behaving like a non-newtonian fluid
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Instability in explicit FDM for Non-Newtonian fluid.

Hi r/CFD,

My friend and I wrote a finite difference method solver for truncated power law fluids in Python. As some of you may have guessed, we started down this path after trying our hands at the CFDPython module by Prof. Lorena Barba.

The code runs great for shear-thickening fluids(power law index n>1) and for a Newtonian(n = 1) fluid. We tested it against known analytical solutions for Pressure Driven Channel flows, aka. Poiseuille flows, and the results are quite a good match.

The issue we are facing comes from shear-thinning fluids(n<1). We have only been able to run it successfully for n >=0.8 or a little below and that too for a rather coarse grid of 34 by 34, but it still was very close to the analytical solution. If we even increase the grid fineness to a 51 by 51 grid, the solution diverges. We need some help to get an idea where this instability is coming from and how to get rid of it. We are already using $dt = sigma * dx^(2) / nu$ to make sure our time step is small enough.

I am posting a link to the pdf where I discretize the Momentum equations to account for the variable viscosity. The momentum equations and their discretized forms.

I am also adding the link to my GitHub repository where you can get the Jupyter Notebook: FDM-NonNewt.

Pls help us out. We are quite a bit out of our depth here.

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Volcanic ash behaving like a non-newtonian fluid
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In non-Newtonian fluids, viscosity can change when under force to either more liquid or more solid. Applying lots of force to a balloon filled with non-Newtonian fluid with a golf ball shot out of a propane cannon at over 300 ft/sec yields lots of solid chunks, demonstrating this property.
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Non-Newtonian fluids turn into solids when pressure is applied. v.redd.it/yovso62qv3u51
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Non-Newtonian fluids turn into solids when pressure is applied. v.redd.it/yovso62qv3u51
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Volcanic ash behaving like a non-Newtonian fluid gfycat.com/remarkablenarr…
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Volcanic ash behaving like a non-newtonian fluid
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Non-Newtonian fluid, the harder you press, thre harder it gets
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I wish semen was a non-Newtonian fluid, like oobleck or ketchup.
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In non-Newtonian fluids, viscosity can change when under force to either more liquid or more solid. Applying lots of force to a balloon filled with non-Newtonian fluid with a golf ball shot out of a propane cannon at over 300 ft/sec yields lots of solid chunks, demonstrating this property.
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Is non-newtonian fluid bulletproof? And if so why don't we use it for armour or protection?

Saw a post showing the main features of non-newtonian fluid and I just thought, surely if this was all around you constantly you'd be invincible.

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The best sports bra uses non-Newtonian fluid popsci.com/story/technolo…
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Non-Newtonian fluid, the harder you press, the harder it gets v.redd.it/ovit72dkpxu51
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Non-newtonian fluid in a hydraulic press
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[#693|+359|25] Non-Newtonian fluid that does not follow Newton's law of viscosity [r/Physics] reddit.com/r/Physics/comm…
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Non-Newtonian fluids (a mixture of cornstarch and water) turn into solids when pressure is applied gfycat.com/bluebaggyaustr…
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Non-Newtonian fluid, the harder you press, the harder it gets v.redd.it/ovit72dkpxu51
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Non-Newtonian fluid turns into solid when pressure is applied. When water and cornstarch mixture is punched, cornstarch molecules come closer. When you move it slowly you allow cornstarch molecule to separate. v.redd.it/g3huqdujyqd51
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Non-Newtonian fluid on subwoofer v.redd.it/p5i12e5batg51
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Non-Newtonian Fluids Explained (aka Oobleck / Cornstarch & Water) youtube.com/watch?v=JGfyn…
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Speed bump filled with a non-Newtonian fluid, designed such that cars going over the bump feel it only if they exceed the speed limit. gfycat.com/zealousadmired…
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Any liquid acts like a non-newtonian fluid if you hit it hard enough.
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[#142|+8317|244] Non-Newtonian fluid, the harder you press, the harder it gets [r/nextfuckinglevel] reddit.com/r/nextfuckingl…
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Non-Newtonian fluid, the harder you press, the harder it gets v.redd.it/ovit72dkpxu51
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Would a non-newtonian fluid work in a bulletproof vest?

I don't even know if that is a thing but would a bulletproof vest with non-newtonian fluid inside work? Is it even possibile to make one?

See a non-newtonian fluid gets harder the more force is put to it - so i think it's theoretically possible to stop anything at the point od impact. If making a vest pit of this fluid it would best defense ever.

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Dry Ice being Dropped into Non-Newtonian Fluid
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Non-Newtonian fluid, the harder you press, the harder it gets v.redd.it/ovit72dkpxu51
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Non-Newtonian fluid, the harder you press, the harder it gets
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