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Salah Kouhen

Salah Kouhen

A PhD student at Oxford. Interested in turbulence, physics generally and a mix of many other things.

Lake from a dream: the Fresnel effect

Lake from a dream: the Fresnel effect

I made a lake in unity! You can scroll down to walk around it in your browser. The lake is achieved by combining a few different effects. Reflections, small waves on the surface (generated by layering noise at two scales that shifts in time), waves that emanate from the player

Fractals, Infinty and AI

Fractals, Infinty and AI

Have you ever watched one of those super deep fractal zoom videos? I saw this one in particular back in high school and remember being blown away; how was such beauty being constructed? I thought that there must be some complicated mathematics that was being used to generate the image

Von Kármán vortex street Lattice Boltzmann method sim

Von Kármán vortex street Lattice Boltzmann method sim

A von Kármán vortex street happens when fluid flows past a cylindrical obstruction. You get a series of vortices that march down flow. I wrote a Lattice-Boltzmann method solver in c# to simulate such a scenario. It suffers from numerical instability but if the velocity is raised slowly enough, you

What's been happening? (Part 2)

What's been happening? (Part 2)

This is the second of two posts in which I try to give a proper answer to "what's been happening?". I am attempting to give an overall picture of how things became the way they are. Part 1 was on prehistory and started with the big

What's been happening? (Part 1)

What's been happening? (Part 1)

With these two posts I am going to try and give a good answer to the question of "what's been happening?". It can be difficult to get an overall picture of how things became the way they are. That is what these posts attempt to provide.

Rain before 7, fine by 11

Rain before 7, fine by 11

You may have heard this proverb before. It's a British saying based on our changeable weather. If you live here, you probably noticed that heavy rain will often clear up by noon - or at least weaken considerably. But how true is this observation really? Grey and rainy

Starting a visual artistry journey: working with shaders

Starting a visual artistry journey: working with shaders

I love the way fluids move, you can probably relate to that. The beautiful swirling patterns you see when washing the dishes or those dramatic clouds over the ocean give life a bit of extra meaning. That is one of the reasons why I studied maths at university and definitely