Youssef Saade

Ph.D. Fluid Mechanics @ Physics of Fluids, University of Twente | R&D researcher @ Canon Production Printing.

[Youssef Saade @ysaadey]

In a letter to Robert Hooke, Sir Isaac Newton states the following metaphor: "If I have seen further, it is
by standing on the shoulders of Giants".

A heartfelt thanks to @detlef_lohse and Andrea Prosperetti: the giants upon whose shoulders I stood, and got my Ph.D. degree.

[Youssef Saade @ysaadey]

@DimaSadek ماشي، بس خفّفي عيشان.

[Youssef Saade @ysaadey]

@DimaSadek ما في لزوم تعمليلنا معلّقة قبل ما تستنكري التصريح. فيكي تستنكري و بس. و ما تخافي ما رح نفكّرك نقلتي البارودة من كتف لكتف.

[Youssef Saade @ysaadey]

@NidalSabeh أستاذ نضال، صرلي زمان بدي إسألك. كيف في الواحد يصير مثلك "باحث في الشأن السياسي"؟ في شي شهادة أو مسار جامعي؟ أنا حابب إستحصل عاللقب إذا ممكن تفيدني أفا��ك الله.

[Youssef Saade @ysaadey]

Félicitations @zaleski!

[∂'Alembert - SU & CNRS @d_Alembert_]

Félicitations à Stéphane pour sa médaille de l'Académie des Sciences (Mécaniques & Informatiques) @AcadSciences

[Youssef Saade @ysaadey]

@PhysRevFluids Is the debian logo used knowingly in the graphical abstract? 😂

[Youssef Saade @ysaadey]

@GermanosPeter Oudated?

[Youssef Saade @ysaadey]

In the case the polygon is a triangle, assign a pair of numbers to each vertex, and jump 1/2 the distance instead. Otherwise, the algorithm is the same.

Here, too, the result is anything but random: another fractal called the Sierpiński triangle.

[Youssef Saade @ysaadey]

Chaos Game.

Draw a hexagon. Assign # from 1 to 6 to vertices. Start from a random pt inside the hexagon. Roll the dice. Jump 2/3 the distance on the line segment joining the pt and the dice-chosen vertex. Roll the dice again and repeat from the new pt. The result is a "fractal".

[Youssef Saade @ysaadey]

@FrangiehJoe الله يسامحك

[Youssef Saade @ysaadey]

@nntaleb Hope to meet you in Ehden one day, Nassim!
Enjoy the reserve :) and later the food, I presume!

[Stephen Wilson @S_K_Wilson]

Great evening getting to know the @lorentzcenter workshop participants at the #contactline between land and sea (i.e. the beach) at @ZiltKatwijk.

[Youssef Saade @ysaadey]

This a clear demonstration of the "butterfly effect", whereby the Lorenz attractor exhibits an erratic dependence on the initial conditions. The green tracers follow trajectories whose starting points belong to a circle of radius ε << 1 centered around the red tracer at t = 0.

[Youssef Saade @ysaadey]

This a clear demonstration of the "butterfly effect", whereby the Lorenz attractor exhibits an erratic dependence on the initial conditions. The green tracers follow trajectories whose starting points belong to a circle of radius ε << 1 centered around the red tracer at t = 0.

[Youssef Saade @ysaadey]

In 1963, Edward Lorenz designed a system of nonlinear ODEs to "represent forced dissipative hydrodynamic flow". Solutions to this system can be depicted as 3D trajectories settling onto a thin set that looks like butterfly wings, now famously called the "Lorenz attractor".

[Youssef Saade @ysaadey]

I wanted to go a bit old school, so I wrote a Dormand-Prince 5th order embedded Runge-Kutta method, in C language, and generated the above video using bash, gnuplot and ffmpeg.

Oh the joy of playing with pointers again!

[Youssef Saade @ysaadey]

@piersmorgan @netanyahu Piers "Hasbara" Morgan. You will never be absolved.

[Youssef Saade @ysaadey]

Excited to see our work, entitled "Finite speed of sound effects on asymmetry in multibubble cavitation", published in Physical Review Fluids.

Work with @mandeep19807139, Daniel Fuster and @detlef_lohse.

[Physical Review Fluids @PhysRevFluids]

PRFluids Editors' Suggestion: In this new paper, @detlef_lohse and co. introduce novel insights into multibubble cavitation phenomena by focusing on the impact of the finite speed of sound on the asymmetry observed in bubble clusters under pressure waves. https://t.co/EcJvrQN77p

[Youssef Saade @ysaadey]

@OTVLebanon ماشي ناطرينه! بس منيحة منكن إثنين رح بتحاوروه. فرد واحد أكيد ما بلحّقله يخزي العين عنّه و الله يحميه!