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Dr. Moritz Lehmann<p>I made this <a href="https://mast.hpc.social/tags/FluidX3D" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FluidX3D</span></a> <a href="https://mast.hpc.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a> simulation run on a frankenstein zoo of 🟥AMD + 🟩Nvidia + 🟦Intel <a href="https://mast.hpc.social/tags/GPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GPU</span></a>​s! 🖖🤪<br><a href="https://www.youtube.com/watch?v=_8Ed8ET9gBU" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">youtube.com/watch?v=_8Ed8ET9gB</span><span class="invisible">U</span></a></p><p>The ultimate SLI abomination setup:<br>- 1x Nvidia A100 40GB<br>- 1x Nvidia Tesla P100 16GB<br>- 2x Nvidia A2 15GB<br>- 3x AMD Instinct MI50<br>- 1x Intel Arc A770 16GB</p><p>I split the 2.5B cells in 9 domains of 15GB - A100 takes 2 domains, the other GPUs 1 domain each. The GPUs communicate over PCIe via <a href="https://mast.hpc.social/tags/OpenCL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OpenCL</span></a>.</p><p>Huge thanks to Tobias Ribizel from TUM for the hardware!</p>
Dr. Moritz Lehmann<p>I got access to <span class="h-card" translate="no"><a href="https://mastodon.social/@LRZ_DE" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>LRZ_DE</span></a></span>'s new coma-cluster for <a href="https://mast.hpc.social/tags/OpenCL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OpenCL</span></a> benchmarking and experimentation 🖖😋💻🥨🍻<br>I've added a ton of new <a href="https://mast.hpc.social/tags/FluidX3D" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FluidX3D</span></a> <a href="https://mast.hpc.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a> <a href="https://mast.hpc.social/tags/GPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GPU</span></a>​/​<a href="https://mast.hpc.social/tags/CPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CPU</span></a> benchmarks:<br><a href="https://github.com/ProjectPhysX/FluidX3D?tab=readme-ov-file#single-gpucpu-benchmarks" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">github.com/ProjectPhysX/FluidX</span><span class="invisible">3D?tab=readme-ov-file#single-gpucpu-benchmarks</span></a></p><p>Notable hardware configurations include:<br>- 4x H100 NVL 94GB<br>- 2x Nvidia L40S 48GB<br>- 2x Nvidia A2 15GB datacenter toaster<br>- 2x Intel Arc A770 16GB<br>- AMD+Nvidia SLI abomination consisting of 3x Instinct MI50 32GB + 1x A100 40GB<br>- AMD Radeon 8060S (chonky Ryzen AI Max+ 395 iGPU with quad-channel RAM) thanks to <span class="h-card" translate="no"><a href="https://mast.hpc.social/@cheese" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>cheese</span></a></span></p>
Giuseppe Bilotta<p>This thread about writing games vs writing game engines &lt;<a href="https://peoplemaking.games/@eniko/114137694102639793" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">peoplemaking.games/@eniko/1141</span><span class="invisible">37694102639793</span></a>&gt; by <span class="h-card" translate="no"><a href="https://peoplemaking.games/@eniko" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>eniko</span></a></span>, and the comments within by many other people, is a fascinating read for me, particularly in relation to the similarities and the differences with our experience in the development of what is, for all intents and purposes, a <a href="https://fediscience.org/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a> engine, but also many of the test cases it has been used for.</p><p>For many <a href="https://fediscience.org/tags/ComputationalFluidDynamics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ComputationalFluidDynamics</span></a> methods, it's actually pretty simple to write an implementation for a “trivial” test case (straight walls, right angles if any at all, periodic boundary conditions, etc). We did that for example in a couple of hours during the MODCLIM 2016 training school <a href="https://modclim.ulpgc.es/index.php/events/8-modclim-events" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">modclim.ulpgc.es/index.php/eve</span><span class="invisible">nts/8-modclim-events</span></a></p><p>Things become quickly non-trivial as soon as you start needing</p><p>1. non-trivial geometries</p><p>and</p><p>2. more complex physics and/or more sophisticated methods.</p><p>1/</p>
Dr. Moritz Lehmann<p><a href="https://mast.hpc.social/tags/FluidX3D" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FluidX3D</span></a> <a href="https://mast.hpc.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a> v3.2 is out! I've implemented the much requested <a href="https://mast.hpc.social/tags/GPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GPU</span></a> summation for object force/torque; it's ~20x faster than <a href="https://mast.hpc.social/tags/CPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CPU</span></a> <a href="https://mast.hpc.social/tags/multithreading" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>multithreading</span></a>. 🖖😋<br>Horizontal sum in <a href="https://mast.hpc.social/tags/OpenCL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OpenCL</span></a> was a nice exercise - first local memory reduction and then hardware-supported atomic floating-point add in VRAM, in a single-stage kernel. Hammering atomics isn't too bad as each of the ~10-340 workgroups dispatched at a time does only a single atomic add.<br>Also improved volumetric <a href="https://mast.hpc.social/tags/raytracing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>raytracing</span></a>!<br><a href="https://github.com/ProjectPhysX/FluidX3D/releases/tag/v3.2" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">github.com/ProjectPhysX/FluidX</span><span class="invisible">3D/releases/tag/v3.2</span></a></p>
Dr. Moritz Lehmann<p>Hot Aisle's 8x AMD <a href="https://mast.hpc.social/tags/MI300X" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>MI300X</span></a> server is the fastest computer I've ever tested in <a href="https://mast.hpc.social/tags/FluidX3D" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FluidX3D</span></a> <a href="https://mast.hpc.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a>, achieving a peak <a href="https://mast.hpc.social/tags/LBM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LBM</span></a> performance of 205 GLUPs/s, and a combined VRAM bandwidth of 23 TB/s. 🖖🤯<br>The <a href="https://mast.hpc.social/tags/RTX" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RTX</span></a> 5090 looks like a toy in comparison.</p><p>MI300X beats even Nvidia's GH200 94GB. This marks a very fascinating inflection point in <a href="https://mast.hpc.social/tags/GPGPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GPGPU</span></a>: <a href="https://mast.hpc.social/tags/CUDA" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CUDA</span></a> is not the performance leader anymore. 🖖😛<br>You need a cross-vendor language like <a href="https://mast.hpc.social/tags/OpenCL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OpenCL</span></a> to leverage its power.</p><p>FluidX3D on <a href="https://mast.hpc.social/tags/GitHub" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GitHub</span></a>: <a href="https://github.com/ProjectPhysX/FluidX3D" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">github.com/ProjectPhysX/FluidX</span><span class="invisible">3D</span></a></p>
Giuseppe Bilotta<p>I'm going to take advantage of the current <a href="https://fediscience.org/tags/eruption" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>eruption</span></a> on Mt <a href="https://fediscience.org/tags/Etna" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Etna</span></a> to discuss some of the challenges of <a href="https://fediscience.org/tags/modelling" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>modelling</span></a> <a href="https://fediscience.org/tags/lava" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>lava</span></a> flows. Buckle up (or just silence me) because this is going to be a long thread.</p><p>First of all, why do we want to model lava flows? The answer most definitely isn't «because we can», since —as I'm going to explain momentarily— we actually cannot. Still having an idea about how lava flows and sets in place is a powerful tool for the assessment (and possibly mitigation) of the associated <a href="https://fediscience.org/tags/hazard" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>hazard</span></a> and <a href="https://fediscience.org/tags/risk" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>risk</span></a>: if we can tell how lava flows, we can tell which areas are going to be reached by the lava, and hopefully also improve the design of tactical and strategic actions that can be taken to minimize the damage.</p><p>(Of course, whether or not those actions will then be taken is an entirely different matter, but that's mostly politics, not science.)</p><p>1/</p><p><a href="https://fediscience.org/tags/MtEtna" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>MtEtna</span></a> <a href="https://fediscience.org/tags/modelling" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>modelling</span></a> <a href="https://fediscience.org/tags/simulation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>simulation</span></a> <a href="https://fediscience.org/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a> <a href="https://fediscience.org/tags/NaturalHazard" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NaturalHazard</span></a> <a href="https://fediscience.org/tags/hazardAssessment" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>hazardAssessment</span></a> <a href="https://fediscience.org/tags/riskAssessment" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>riskAssessment</span></a> <a href="https://fediscience.org/tags/riskMitigation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>riskMitigation</span></a></p>
Dr. Moritz Lehmann<p>The 4x <a href="https://mast.hpc.social/tags/Nvidia" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Nvidia</span></a> <a href="https://mast.hpc.social/tags/H100" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>H100</span></a> SXM5 server in the new Festus cluster at Uni Bayreuth is the fastest system I've ever tested in <a href="https://mast.hpc.social/tags/FluidX3D" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FluidX3D</span></a> <a href="https://mast.hpc.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a>, achieving 78 GLUPs/s <a href="https://mast.hpc.social/tags/LBM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LBM</span></a> performance at ~1650W <a href="https://mast.hpc.social/tags/GPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GPU</span></a> power draw. 🖖😋🖥️🔥<br><a href="https://github.com/ProjectPhysX/FluidX3D?tab=readme-ov-file#multi-gpu-benchmarks" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">github.com/ProjectPhysX/FluidX</span><span class="invisible">3D?tab=readme-ov-file#multi-gpu-benchmarks</span></a><br><a href="https://www.hpc.uni-bayreuth.de/clusters/festus/#__tabbed_1_3" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">hpc.uni-bayreuth.de/clusters/f</span><span class="invisible">estus/#__tabbed_1_3</span></a></p>
Chapel Programming Language<p>For the first time, the Chapel team at HPE and the CHAMPS team at Polytechnique Montreal will give a joint talk. Join us Thursday, February 20th at 9AM PST in Advanced Modeling &amp; Simulation (AMS) Seminar Series hosted by NASA Ames Research Center!</p><p>The talk will be open to public. You can find the meeting link over at <a href="https://www.nas.nasa.gov/pubs/ams/2025/02-20-25.html" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">nas.nasa.gov/pubs/ams/2025/02-</span><span class="invisible">20-25.html</span></a> !</p><p><a href="https://mastodon.social/tags/ChapelLang" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ChapelLang</span></a> <a href="https://mastodon.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a> <a href="https://mastodon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NASA</span></a></p>
Dr. Moritz Lehmann<p><a href="https://mast.hpc.social/tags/FluidX3D" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FluidX3D</span></a> <a href="https://mast.hpc.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a> v3.1 is out! I have updated the <a href="https://mast.hpc.social/tags/OpenCL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OpenCL</span></a> headers for better device specs detection via device ID and <a href="https://mast.hpc.social/tags/Nvidia" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Nvidia</span></a> compute capability, fixed broken voxelization on some <a href="https://mast.hpc.social/tags/GPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GPU</span></a>​s and added a workaround for a CPU compiler bug that corrupted rendering. Also <a href="https://mast.hpc.social/tags/AMD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AMD</span></a> GPUs will now show up with their correct name (no idea why AMD can't report it as CL_DEVICE_NAME like every other sane vendor and instead need CL_DEVICE_BOARD_NAME_AMD extension...)<br>Have fun! 🖖😉 <br><a href="https://github.com/ProjectPhysX/FluidX3D/releases/tag/v3.1" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">github.com/ProjectPhysX/FluidX</span><span class="invisible">3D/releases/tag/v3.1</span></a></p>
M Schommer<p><span class="h-card" translate="no"><a href="https://norden.social/@thijs_lucas" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>thijs_lucas</span></a></span> <br>Uuuund wieder einmal passt zwischen die Blauen kein Blatt Papier. <a href="https://hostux.social/tags/CfD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CfD</span></a> </p><p><span class="h-card" translate="no"><a href="https://det.social/@lostgen" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>lostgen</span></a></span></p>
Dr. Moritz Lehmann<p><span class="h-card" translate="no"><a href="https://masto.ai/@phoronix" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>phoronix</span></a></span> nice, the 512-bit memory bus doing its thing in <a href="https://mast.hpc.social/tags/FluidX3D" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FluidX3D</span></a> <a href="https://mast.hpc.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a>! 🖖😋<br>Thanks for benchmarking!</p>
Giuseppe Bilotta<p>A heads-up for anyone interested in <a href="https://fediscience.org/tags/SPH" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SPH</span></a> <a href="https://fediscience.org/tags/SmoothedParticleHydrodynamics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SmoothedParticleHydrodynamics</span></a>: the <a href="https://fediscience.org/tags/SPHERIC2025" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SPHERIC2025</span></a> abstract submission deadline has been moved to January 20.</p><p><a href="https://spheric2025.upc.edu/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">spheric2025.upc.edu/</span><span class="invisible"></span></a></p><p><a href="https://fediscience.org/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a></p>
Dr. Moritz Lehmann<p>3 different <a href="https://mast.hpc.social/tags/GPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GPU</span></a>​s, 1 <a href="https://mast.hpc.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a> simulation - <a href="https://mast.hpc.social/tags/FluidX3D" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FluidX3D</span></a> "SLI"-ing (Intel A770 + Intel B580 + Nvidia Titan Xp) for 678 Million grid cells in 36GB combined VRAM <br><a href="https://www.youtube.com/watch?v=9VP3fruwnXc" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">youtube.com/watch?v=9VP3fruwnX</span><span class="invisible">c</span></a></p>
Kevin Karhan :verified:<p><span class="h-card" translate="no"><a href="https://mastodon.social/@Mlobbes" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>Mlobbes</span></a></span> <a href="https://infosec.space/tags/Gambling" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Gambling</span></a> can't be banned, that ship sailed.</p><ul><li>The only thing one can do is curb illegal operations and direct things into a controllable <em>"bright field"</em> (similar to other criminalized actions like <a href="https://infosec.space/tags/Drugs" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Drugs</span></a> &amp; <a href="https://infosec.space/tags/Alcohol" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Alcohol</span></a>)...</li></ul><p>Also what would qualify as <a href="https://infosec.space/tags/Gambling" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Gambling</span></a>?</p><ul><li>Cuz if you were honest, <a href="https://infosec.space/tags/Stocks" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Stocks</span></a> and <a href="https://infosec.space/tags/CommodotyTrading" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CommodotyTrading</span></a> and <a href="https://infosec.space/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a>|s are also Gambling (and I think we either need to ball all worldwide or none!)</li></ul>
Giuseppe Bilotta<p><a href="https://fediscience.org/tags/SPHERIC2025" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SPHERIC2025</span></a> will be in <a href="https://fediscience.org/tags/Barcelona" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Barcelona</span></a> <br><a href="https://spheric2025.upc.edu/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">spheric2025.upc.edu/</span><span class="invisible"></span></a></p><p>It will be the first <a href="https://fediscience.org/tags/SPHERIC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SPHERIC</span></a> <a href="https://fediscience.org/tags/conference" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>conference</span></a> to break from the "classic" SPHERIC International Workshop format that was also employed for the SPHERIC 2022 I organized in Catania, and closer to other more traditional conferences (hence also the change in name, to SPHERIC World Conference).</p><p>1/</p><p><a href="https://fediscience.org/tags/SPH" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SPH</span></a> <a href="https://fediscience.org/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a> <a href="https://fediscience.org/tags/SolidMechanics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SolidMechanics</span></a> <a href="https://fediscience.org/tags/AstroPhysics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AstroPhysics</span></a> <a href="https://fediscience.org/tags/ParticleMethods" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ParticleMethods</span></a></p>
Giuseppe Bilotta<p>So there's apparently a <a href="https://fediscience.org/tags/metal" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>metal</span></a> song mentioning the <a href="https://fediscience.org/tags/NavierStokes" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NavierStokes</span></a> equations now.</p><p><a href="https://youtu.be/Jy99ywCp3qU" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">youtu.be/Jy99ywCp3qU</span><span class="invisible"></span></a></p><p><a href="https://fediscience.org/tags/music" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>music</span></a> <a href="https://fediscience.org/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a> <a href="https://fediscience.org/tags/meteorology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>meteorology</span></a> <a href="https://fediscience.org/tags/parody" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>parody</span></a></p>
Dr. Moritz Lehmann<p>This is the largest <a href="https://mast.hpc.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a> simulation ever on a single computer, the <a href="https://mast.hpc.social/tags/NASA" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NASA</span></a> X-59 at 117 Billion grid cells. This video visualizes 7.6 PetaByte if volumetric data.</p><p>I did this simulation on 2x <a href="https://mast.hpc.social/tags/Intel" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Intel</span></a> Xeon 6980P <a href="https://mast.hpc.social/tags/HPC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HPC</span></a> CPUs with 6TB MRDIMM memory at massive 1.7TB/s bandwidth. No <a href="https://mast.hpc.social/tags/GPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GPU</span></a>​s required! 🖖😋🟦</p><p><a href="https://www.youtube.com/watch?v=K5eKxzklXDA" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">youtube.com/watch?v=K5eKxzklXD</span><span class="invisible">A</span></a></p><p>As a little gift to you all: <a href="https://mast.hpc.social/tags/FluidX3D" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FluidX3D</span></a> v3.0 is out now, enabling 31% larger resolution on CPUs/iGPUs with <a href="https://mast.hpc.social/tags/OpenCL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OpenCL</span></a> zero-copy buffers:<br><a href="https://github.com/ProjectPhysX/FluidX3D/releases/tag/v3.0" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">github.com/ProjectPhysX/FluidX</span><span class="invisible">3D/releases/tag/v3.0</span></a></p>
Kleiner Radler - resigniert<p>Ein erster grober Entwurf für das Design meines <a href="https://freiburg.social/tags/Airgroover" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Airgroover</span></a> <a href="https://freiburg.social/tags/Velomobil" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Velomobil</span></a> ist in Arbeit. Derzeit scheitere ich beim Versuch, <a href="https://freiburg.social/tags/Openfoam" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Openfoam</span></a> für die aerodynamische Analyse in <a href="https://freiburg.social/tags/Freecad" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Freecad</span></a> einzubinden. Ab jetzt möchte ich eigentlich jede Weiterentwicklung der Formgebung mit einer <a href="https://freiburg.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a> Analyse begleiten, um ein möglichst gute Aerodynamik zu erzielen.</p><p>Die vorderen Räder werden frei stehen, aber unter einer mitlenkenden Haube vor dem Wind versteckt werden. Die hinteren Räder werden in die Karosserie integriert.</p><p>Das Velomobil wird vier Räder bekommen, um eine hohe Fahrstabilität zu erreichen. Die Vorderachse wird sich im Gegensatz zu auf dem Markt befindlichen Mobilen stark unterscheiden. Zum einen wird aus Platzgründen der Antrieb vorne erfolgen, zum anderen wird die Geometrie der Achse so gestaltet, dass bei ungleichmäßig ziehenden Bremsen sich das Fahrzeug selbstständig stabilisiert und nicht zum ziehen in Richtung des stärker bremsenden Rades tendiert.</p><p>Das ganze Projekt soll frei zugänglich für alle als <a href="https://freiburg.social/tags/Openhardware" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Openhardware</span></a> veröffentlicht werden. So ist es dann auch Möglich Ideen die gefallen zu kopieren und in ganz anderen Projekten zu verwenden.</p>
Giuseppe Bilotta<p>I love the smell of burning plastic when running a heavy-duty <a href="https://fediscience.org/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a> simulation on my laptop's <a href="https://fediscience.org/tags/GPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GPU</span></a> </p><p><a href="https://fediscience.org/tags/humor" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>humor</span></a> <a href="https://fediscience.org/tags/humour" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>humour</span></a> <a href="https://fediscience.org/tags/HPC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HPC</span></a> <a href="https://fediscience.org/tags/GPGPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GPGPU</span></a></p>
Dr. Moritz Lehmann<p>I'm going to <a href="https://mast.hpc.social/tags/SC24" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SC24</span></a>!! 🖖😋<br>Did a little gig with our <a href="https://mast.hpc.social/tags/HPC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HPC</span></a> team: <a href="https://mast.hpc.social/tags/FluidX3D" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FluidX3D</span></a> <a href="https://mast.hpc.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a> go brrr on Xeon 6 with 6TB of MRDIMMs! Super excited, will be my first travel outside of the EU. 🇩🇪✈️🇺🇸 <br><span class="h-card" translate="no"><a href="https://mast.hpc.social/@fclc" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>fclc</span></a></span> duuuude we gotta meet at <a href="https://mast.hpc.social/tags/Intel" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Intel</span></a> booth!! 🖖😁<br>cc <span class="h-card" translate="no"><a href="https://mastodon.social/@HPC_Guru" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>HPC_Guru</span></a></span></p>