This Week in CFD

This week’s compilation of CFD news begins with quantum mechanics and interpretive dance. Not a typo. Your CFD skills could win you some cash in a challenge being run by our friends in Washington. There are many good things going on here at Cadence CFD, some that we can’t talk about (forward looking statements and all that) and some that we can which are highlighted herein. Shown here is a simulation of… well, you know what it is. It’s from the folks at MindMesh who were finding the balance between low water usage and effective waste removal. Some might say this is the perfect logo for This Week in CFD.


  • Submitted for your review and commentary: what can quantum superfluids (i.e. inviscid) teach us about regular fluids? Apparently, the origin of drag.
  • As first seen on FYFD, here’s a video in which “dance is used to demonstrate the motion of fluids that the mathematics describes through a physics-constrained dance improvisation.” [How about a flash mob at AIAA SciTech in January?]

CFD for…

  • the loo, WC, pot, toilet, throne, bowl, lav…
  • the NASA CC3 transonic centrifugal compressor.
  • coffee and electromagnetics. [Worth reading just to see how those two are tied together.]
  • WINNING VALUABLE PRIZES. The U.S. Bureau of Reclamation is running the Divide and Conquer Challenge with $300,000 in total prizes for improving the speed of simulations of river hydraulics and sediment transport. Due date is 27 Mar 2022.
CFD applications (this is flow over a tailing pile) for the mining industry by our friends at Airflow Sciences Corp. (AzoreCFD). [I just wish the image was a) bigger and b) not a JPG.]
UPDATED: Alert reader Rob saw my wish in the previous image’s caption and provided this higher-resolution PNG that shows the simulation in much better detail.

From Cadence CFD

An illustration of meshing enhancements in FINE/Marine 10.2. See link above.


  • Things are coming together for ESI’s 9th OpenFOAM Conference (19-20 October, online). Registration is open, the agenda has been published, and the keynotes look great: Dr. Akshai Runchal speaking on 50 Years of CFD in Engineering Services and Dr. Phillipe Spalart speaking on Turbulence Research in This Half-Century. [Probably worth your time just for the keynotes alone but please stay for all the OpenFOAM goodness.]
    • Speaking of ESI, Monica Schnitger reports their Q2 revenue as €26.3 million, an increase of 2%.
  • The next International Meshing Roundtable (23-26 Feb 2022, Seattle) has extended the deadline for their call for papers until 15 Oct 2021. Research notes and posters are due 07 Jan 2022. This event will be the IMR’s first of their new partnership with SIAM so I encourage all meshing-inclined folks to attend. [Besides, it’ll be an in-person event.]

Animation, Meshing, and Lattice Boltzmann

  • From the world of animation (SIGGRAPH Asia 2020) comes this really remarkable work on easily addition secondary effects to the rig used to make characters move. The authors call it complimentary dynamics. Very much worth just watching the videos if nothing else.
  • Want to learn Gmsh? FEA for All offers a 4-part tutorial series: Part 1, Part 2, Part 3, Part 4
  • ENA2 provides this brief description of LBM (the Lattice Boltzmann method).
    • One of the references cited therein says the global CFD market in 2020 totaled $1.93B.

Lattice of Another Form

Only recently getting his due, Sam Gilliam’s painting seems to have started in the abstract expressionist movement but has outgrown it. Some of his most well-known and most-loved works are huge, unframed, often enormous canvases that hang loosely from walls – supposedly inspired by laundry hung out to dry. By making the canvas an active participant in his art versus just a substrate on which to create, Gilliam achieves what Frank Stella claims all painters are trying to do – paint the third dimension.

Gilliam extended his innovative work with the canvas to a series of paintings that are collage-like assemblies of cut up paintings creating a patchwork – supposedly inspired by African quilts. The print of Lattice II (below) demonstrates some of that harmonizing of fragments into an engaging unified whole.

For more on Gilliam, see his webpage at the Smithsonian.

Sam Gilliam, Lattice II, 1982. source

Fun with Geometry: The Conway (yes, Game of Life Conway) Circle Theorem states “If the sides meeting at each vertex of a triangle are extended by the length of the opposite side…” You’ll have to click through for the punchline.

Fun with Flow: AeroDoodle. Addictive. You’ve been warned

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