A collection of all the "Pictures of the Month" which have appeared on the [Front Page](/Front%20Page) over the years.

![The "beads on string" structure of a thinning viscoelastic jet ([Zinelis et al, 2024](Bibliography#zinelis2024))](beads-on-string.png){width="80%"}

<div class="figure">
<video controls="" preload="metadata" width="75%">
+<source src="/sandbox/nlemoine/groundwater/Meuvaines/meuvaines/gw_levels.mp4" type="video/mp4">
</video>
<p class="caption">
[Groundwater modelling of the Meuvaines coastal wetland](/sandbox/nlemoine/groundwater/Meuvaines/meuvaines.c) by [Nicolas Lemoine](/sandbox/nlemoine/README)
</p>
</div>

<div class="figure">
<video controls="" preload="metadata" width="600">
+<source src="/sandbox/ecipriano/run/staticbi/movie.mp4" type="video/mp4">
</video>
<p class="caption">
Isothermal Evaporation of a Static Binary Droplet: Evolution of the mass fraction fields of the light, heavy, and inert components, and the grid refinement.<br>See [Edoardo Cipriano's sandbox](/sandbox/ecipriano/run/staticbi.c) and [Cipriano et al, 2024](Bibliography#cipriano2024).
</p>
</div>

![*Assessing passive scalar dynamics in bubble-induced turbulence using direct numerical simulations* by [Hidman et al, 2023](Bibliography#hidman2023)](/img/hidman2023.jpg){width="100%"}

![Diffusiophoresis-enhanced reaction-diffusion equations (bottom right) can explain how the [Ornate Boxfish](https://en.wikipedia.org/wiki/Aracana_ornata) gets its spots (bottom left). See [How animals get their stripes and spots](https://www.colorado.edu/today/2023/11/08/how-animals-get-their-stripes-and-spots) and [Ben Alessio's sandbox](/sandbox/benalessio/README).](/sandbox/benalessio/alessio.jpg){width="60%"}

![Breaking wave field with the colour indicating the surface velocity and inset showing the curvature-based detection of the breaking front. From [Wu et al, 2023](Bibliography#wu2023).](/sandbox/jiarongw/multilayer/breaking.png){width="80%"}

![Viscosity field in the film (left) and around a rising drop surrounded by a yield-stress fluid (right). From [Deoclecio et al, 2023](Bibliography#deoclecio2023).](/sandbox/lucaspagoto/Drop_Coalescence_In_Bingham_Materials-New-2.svg){width="100%"}

![Comparison between experiment and simulation for the impact of a 1.6 mm
FC-770 droplet onto a silicon oil pool. From [Fudge et al, 2023](Bibliography#fudge2023).](/fudge23.jpg){width="100%"}

![Crystal growth in 3D. From [Limare et al, 2022](Bibliography#limare2022).](sandbox/alimare/crystal3D.jpg){width="600px"}

![Wind-driven wave growth. From [Wu et al, 2022](Bibliography#wu2022).](sandbox/jiarongw/wu2022.png){width="600px"}

![Thin sheet perforation and hole formation. Top: 512^3^ (left) and 1024^3^ (right) grids without controlled perforations. Bottom: 512^3^ (left) and 1024^3^ (right) with manifold death. From [Chirco et al, 2022](Bibliography#chirco2022).](sandbox/lchirco/chirco2022.png){width="800px"}

![Multilayer model of the wave field generated by a volcanic eruption under [lake Taupo, New Zealand](https://en.wikipedia.org/wiki/Lake_Taup%C5%8D). Left: dispersive, right: non-dispersive. From [Hayward et al, 2022](#hayward2022).](sandbox/Hayward/taupo.png){width="800px"}

![Palas Farsoiya's [poster](sandbox/farsoiya/gfm2021.pdf) wins a [Gallery of Fluid Motion](https://www.apsdfd2021.org/program-events/gallery-of-fluid-motion/) award at [APS-DFD](https://www.apsdfd2021.org/)](sandbox/farsoiya/gfm2021.jpg){width="800px"}

<div class="figure">
<video controls="" preload="metadata" width="900">
+<source src="/sandbox/lbattershill/multilayer-slide/slide_layered/movie_closeup.mp4" type="video/mp4">
</video>
<p class="caption">
[Tsunami generation by a "pyroclastic" density current](/sandbox/lbattershill/multilayer-slide/slide_layered.c) by [Lily Battershill](/sandbox/lbattershill/README)
</p>
</div>

<div class="figure">
<video controls>
<source src="/src/examples/lee/movie.mp4" type="video/mp4">
</video>
<p class="caption">
[Non-hydrostatic internal lee waves](/src/examples/lee.c) by [Stéphane Popinet](/sandbox/popinet/README)
</p>
</div>

<div class="figure">
<video controls>
<source src="/sandbox/Antoonvh/pc/parts.mp4" type="video/mp4">
</video>
<p class="caption">
[Heavy magenta particles are spun out of vortices](/sandbox/Antoonvh/pc.c) by [Antoon van Hooft](/sandbox/Antoonvh/README)
</p>
</div>

![[Self-similar solution for the Shallow Ice Approximation](/sandbox/nlemoine/halfar1D.c) by [Nicolas Lemoine](/sandbox/nlemoine/README)](/sandbox/nlemoine/halfar1D/_plot0.svg)

<div class="figure">
<video controls="" preload="metadata" width="900">
<source src="https://antoonvanhooft.nl/media/subsiding.mp4" type="video/mp4">
Your browser does not support the video tag. </video>
<p class="caption">
[Subsiding shells at the edge of a cumulus cloud’s updraft](/sandbox/Antoonvh/subsiding-shell.c) by [Antoon van Hooft](/sandbox/Antoonvh/README). Rendered with [bwatch](/sandbox/Antoonvh/bwatch.h).
</p>
</div>

![[Gas transfer from a bubble in isotropic turbulence](https://gfm.aps.org/meetings/dfd-2020/5f53b6bb199e4c091e67bac0) by Palas Kumar Farsoiya](gas-bubble.png){ width="640" }

<div class="figure">
<video width="500" height="500" controls>
<source src="/sandbox/Antoonvh/kizner12.mp4" type="video/mp4">
</video> $
<p class="caption">
[Vortex ejection from a mode-3 instability](/sandbox/Antoonvh/kizner.c) by [Antoon van Hooft](/sandbox/Antoonvh/README)
</p>
</div>

![[Game of life](/src/examples/life.c) by [Jose-Maria Fullana](http://www.lmm.jussieu.fr/~fullana/) in memory of [John Conway](https://en.wikipedia.org/wiki/John_Horton_Conway) (1937--2020)](/src/examples/life/age.gif){width=500px}

![[Bwatch ray tracing](/sandbox/Antoonvh/minbwatch.c) by [Antoon van Hooft](/sandbox/Antoonvh/README)](/sandbox/Antoonvh/minbwatch/min.png){width=80%}

![[Flow past a rapidly pitching airfoil](/sandbox/ghigo/src/test-embed/pitching-naca0015.c) by [Arthur Ghigo](/sandbox/ghigo/README)](/sandbox/ghigo/src/test-embed/pitching-naca0015/vorticity.mp4)

<div class="figure"> <video controls="" preload="metadata"
width="80%"> <source
src="https://antoonvanhooft.nl/media/rings.mp4"
type="video/mp4"> Your browser does not support the video
tag. </video> <p class="caption">[Collision of two vortex rings](/sandbox/Antoonvh/two_rings.c) by [Antoon van Hooft](/sandbox/Antoonvh/README)</p>
</div>

![[Hodge decomposition](/sandbox/jmf/Hodge/hodge.c) by [Jose-Maria Fullana](/sandbox/jmf/)](/sandbox/jmf/Hodge/hodge/_plot0.svg)

<div class="figure">
<video controls="" preload="metadata" width="600px">
<source src="https://surfdrive.surf.nl/files/index.php/s/N79po3rbsweYyxi/download" type="video/mp4">
Your browser does not support the video tag.
</video>
<p class="caption">
<a href="/sandbox/Antoonvh/tree/cyl3d.c">Flow past a cylinder</a> by <a href="/sandbox/Antoonvh/README">Antoon van Hooft</a>
</p>
</div>

![<a href="/sandbox/M1EMN/Exemples/houle.c">Airy swell</a> by <a href="/sandbox/M1EMN/README">Pierre-Yves Lagrée</a>](/sandbox/M1EMN/Exemples/houle/houle.mp4)( width="800px" )

![<a href="/sandbox/Antoonvh/lee.c">Lee waves</a> by <a href="/sandbox/Antoonvh/README">Antoon van Hooft</a>](/sandbox/Antoonvh/lee/lee.mp4)( width="800px" )

![<a href="/sandbox/aberny/csgBool.c">Constructive Solid Geometry</a> by <a href="/sandbox/aberny/README">Alexis Berny</a>](/sandbox/aberny/csgBool/vof.png)


<p align="center">
<iframe width="560" height="315" src="https://www.youtube-nocookie.com/embed/hzL1oo3xPdg" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe></p>
<p align="center">
<a href="/sandbox/vatsal/DropOnDropImpact/dropOnDropImpact.c">Drop on drop impact</a> by <a href="/sandbox/vatsal/README">Vatsal Sanjay</a>
</p>

![<a href="/sandbox/bderembl/pg.c">Planetary geostrophic model</a> by <a href="/sandbox/bderembl/">Bruno Deremble</a>](/sandbox/bderembl/pg/xzplot.png){ width="500px" }

![<a href="/sandbox/qmagdelaine/phase_change/1_elementary_body/falling_drop.c">Falling evaporating drop</a> by <a href="/sandbox/qmagdelaine/">Quentin Magdelaine</a>](/sandbox/qmagdelaine/phase_change/1_elementary_body/falling_drop/video_ux_vapor.mp4)( width="80%" )

![<a href="/sandbox/M1EMN/Exemples/darcysilo.c">Solution of the potential flow through a small orifice in the bottom of a silo</a> by <a href="/sandbox/M1EMN/README">Pierre-Yves Lagrée</a>](/sandbox/M1EMN/Exemples/darcysilo/_plot1.svg)

![<a href="/src/examples/breaking.c">Breaking Stokes wave (multilayer solver)</a> by <a href="/sandbox/popinet/README">Stéphane Popinet</a>](/src/examples/breaking/movie.mp4)( width="80%" )

![<a href="/src/test/gaussian.c">Transcritical flow over a bump with multiple layers</a> by <a href="http://gfs.sourceforge.net/wiki/index.php/User:Popinet">Stéphane Popinet</a>](/src/test/gaussian/vel.png){ width="100%" }

![<a href="/src/test/inclined-shock.c">Double Mach reflection of a Mach 10 shock from a wall</a> by <a href="/sandbox/fuster/README">Daniel Fuster</a>](/src/test/inclined-shock/rho.mp4)

![<a href="/sandbox/Antoonvh/gradient-sharpening.c">Gradient sharpening by a dipolar vortex</a> by <a href="http://basilisk.fr/sandbox/Antoonvh/README">Antoon van Hooft</a>](/sandbox/Antoonvh/gradient-sharpening/Re800-overview.mp4)(width=100%)