4 ms·
An Injection of Chaos Solves Decades-Old Fluid Mystery
- pomian 5y agoCool article. The linked paper has more details, and math. " energy dissipated by pore-scale fluctuations generates the anomalous increase in the overall flow resistance." Unfortunately they are still at the stage of defining that it happens, not, why? Which is interesting - there is still so much to learn! https://www.science.org/doi/10.1126/sciadv.abj2619 https://www.science.org/doi/10.1126/sciadv.abj2619
- R0b0t1 5y agoThis just means they are subbing out simulation details for injected randomness, no? I thought this was a technique that was known to work in general. I.e. since the combination of many random events is a bell curve if you just put a bell curve somewhere you don't understand something you can get good results.
- rileyphone 5y agoI’m surprised the article didn’t draw an analogy to a traffic jam. The counterintuitive response of decreased throughput from increased flow reminds me of https://en.wikipedia.org/wiki/Braess's_paradox https://en.wikipedia.org/wiki/Braess's_paradox
- bernulli 5y agoInterestingly, it’s an entirely different class of flow! A traffic jam is akin to a shockwave in compressible flow (e.g. gas), here the article talks about (incompressible) liquids.