9/4/2019 | 1 MINUTE READ

Figuring Out Aspects of CFD

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

Analysis of CFD: analysis of analysis?


Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

Computational fluid dynamics (CFD) is now a fundamental part of developing vehicles, be it for purposes of modeling combustion, HVAC systems or the body moving through the air. However, there are models and there are models, and the image shown here, with Dr. Peter Vincent of the Department of Aeronautics at Imperial College London in front of the display, is probably somewhat larger than is ordinarily the case.

Vincent and his colleagues A. S. Iyer, F. D. Witherden, and S. I. Chernyshenko, have done research into turbulence that allows the testing of empirical models (it is a case where the modeling is generally based on previous observations to predict what will occur). Said Vincent: “We now have a solution for an important fundamental flow problem. This means we can check empirical models of turbulence against the ‘correct’ answer, to see how well they are describing what actually happens, or if they need adjusting.”

The researchers have developed the way by which exact parameters describing how disturbance dissipates in the flow and determined requirement that empirical turbulence models must satisfy. As Professor Sergei Chernyshenko put it, “From my first days studying fluid mechanics I had some fundamental questions that I wanted to know the answers to. This was one of them, and now after 40 years I have the answer.”

The four prepared a paper published in the Journal of Fluid Mechanics. The opening summary statement is: “Eigenmodes of averaged small-amplitude perturbations to a turbulent channel flow —which is one of the most fundamental canonical flows — are identified for the first time via an extensive set of high-fidelity GPU-accelerated direct numerical simulations.” Which gives you a sense that this is not the sort of thing you’d dip into for some light reading.



  • What Makes Automotive CAD/CAM Systems So Special?

    The high-end automotive CAD/CAM systems do a whole lot more than their name implies. In addition to design and manufacturing, they have the ability to support analysis, product data management, and more.

  • Designing Seats the PLM Way

    The only back-seat driver in designing automotive seats and trim covers is PLM. That’s a good thing.

  • Ford’s Approach to Additive Manufacturing

    Although 3D printing has become something that is hip an almost artisanal among the digital cognoscenti and within the maker movement, there is the set that contains 3D printing as a subset—additive manufacturing—which is something that is being pursued in earnest by a number of mass manufacturers in order to achieve parts and products the likes of which would be difficult if not completely impossible to produce with conventional methods.