• 5 Posts
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Joined 1 year ago
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Cake day: June 15th, 2023

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  • For example, http://xkcdsw.com is an archive of fan-edited comics, while https://xkcdsw.com is some kind of crypto site.

    That’s not how URLs work. If that’s the behavior you’re experiencing, you likely have been the victim of malware/a virus.

    The first part of the URL is the scheme, which indicates the protocol that the browser must use to request the resource (a protocol is a set method for exchanging or transferring data around a computer network). Usually for websites the protocol is HTTPS or HTTP (its unsecured version). Addressing web pages requires one of these two, but browsers also know how to handle other schemes such as mailto: (to open a mail client), so don’t be surprised if you see other protocols.

    -Source


  • The Navier Stokes equations represent the universal laws of physics that can model any fluid in the universe.

    These equations have been around since almost two centuries now but we still understand very little about them. When we have a set of equations we expect the following to happen-

    1. Solution should exist- One should be able to solve the equations

    2. Solution should be unique- Given particular initial conditions, one should obtain an unique solution to the problem. For example if you and your friend pour water into a container in an identical way, keeping all parameters (pouring velocity, direction, geometry and dimensions of the container, etc) identical then you both should get the same flow pattern. Water in both the containers should behave in exactly the same way. If your friend gets air bubbles at a point then you should get them at the exact same point as well.

    3. Solution should be smooth- A finite change in the input should produce a finite change in the output. It should not be erratic and unpredictable.

    Unfortunately, Navier Stokes equations do not satisfy any of the conditions mentioned above.

    https://medium.com/@ases2409/navier-stokes-equations-the-million-dollar-problem-78c01ec05d75