Aerodynamics

Latest Posts

  • For a typical car driving at highway speeds, about 50% of the energy is spent to overcome the aerodynamic drag and the other 50% is required to overcome the mechanical losses (engine, transmission,...
  • After more than a decade away from race circuits, Jaguar Racing is joining the latest Formula E series
    Electric vehicles hogged the limelight at this year’s Paris Motor Show, and not just cars of the road-going variety. With the third season of the FIA Formula E championship commencing earlier...
  • Automotive Infotainment System
    Today’s infotainment system is the brain of a modern vehicle as it provides its operating information and the information on its surroundings. It helps the driver navigate and operate the vehicle...
  • Mark Gleason | Automotive Aerodynamics Expert and Former Chrysler Director
    Industry expert and Former Chrysler aerodynamics director, Mark Gleason, discusses the limitations of physical prototyping for automobiles.  He also highlights how and why the automotive...
  • Electric vehicles look set to hog the spotlight at this autumn’s Paris motor show
    Electric vehicles look set to hog the spotlight at this autumn’s Paris motor show as makers put increasing faith in a technology that is still struggling in the showrooms. The biannual...
  • Brake rotors are a prime target for light-weighting. Why? For starters they are heavy, around 21 lbs per wheel for a large sedan. This mass has a significant rotating inertia which needs to be...
  • The most far-sighted automotive companies are taking advantage of increasingly cheap computing power to leverage simulation work more heavily in their vehicle development. The technology behind...
  • The mirrorless car has been a long time coming. Concept cars often imagine a future where cameras project side and rear views onto interior screens.
     A report in Automotive News states that Japan has become the first market to allow cameras in place of mirrors. Companies such as Robert Bosch and Japan’s Ichikoh Industries are already...
  • We need a complete rethink about how the automotive industry measures fuel economy.
    We need a complete rethink about how the automotive industry measures fuel economy. The laboratory tested methods used globally today just aren’t fit for purpose. They’re riddled with...
  • A lot has been discussed in the media recently about the next generation of Class 8 tractor designs and how they will seek to improve aero-efficiency – and therefore reduce costs – for...
  • Exa's Dr. Andrea Shestopalov Describes Exa's Optimization Solution
    Exa's Dr. Andrea Shestopalov describes how Exa's solution for optimization is based on a statistical response surface approach and is a fully automated process using Exa PowerFLOW's...
  • Tesla has stated that with the new Model 3 electric car, it wants to reduce the drag co-efficient to an incredibly slippery 0.21 CD (210 counts), down from 0.24 on the Model S.
    Tesla has stated that with the new Model 3 electric car, it wants to reduce the drag coefficient to an incredibly slippery 0.21 CD (210 counts), down from 0.24 on the Model S. But the maker also...
  • There are many drawbacks to wind tunnels. Chief is not understanding why you’re getting the results shown. If you are aiming for an incredibly low drag co-efficient approaching 0.20, then you need to understand the science behind it.
    The mystique of the wind tunnel as the ultimate place to perfect a car’s aerodynamics is blinding some makers to the superior abilities of digital simulation. Retiring head of design at GM...
  • Automotive emissions testing is a complicated problem and digital simulation may be the solution
    Emissions testing just got a whole lot more complicated than it already was for manufacturers – but it really doesn’t need to be. The latest complication originates in Europe, where...
  • Exa's Dr. Paul Stewart discusses the importance of 3D visualization  for vehicle engineers and designers
    Carmakers are continually trying to produce new and exciting designs which appeal to a wide range of customers. At the same time, they’re having to meet increasingly stringent rules and...
  • Exa's demonstrates 3D visualization of automotive and commercial vehicle simulations at Fuel Economy Detroit
    The disparity between published test figures and real-world fuel economy has long been a topic of discussion, and in Europe, the average gap between the two has reportedly risen to 40%. The current...
  • The Importance of Integrated Design Simulation and Visualization Tools
    Exa's Dr. Paul Stewart discusses how automotive engineering and design studios can communicate through simulation and visualization to realize the full aerodynamic, thermal and acoustic potential...
  • Fun aerodynamic simulation of a football using Exa PowerFLOW
    In what will probably turn out to be the final game for the first quarter back in NFL history to reach an incredible 200 career wins, Peyton Manning’s Denver Broncos put on a defensive...
  • Onroak Automotive became the first French constructor to win the Daytona 24 Hours when Speed Motorsports crossed the finishing line first with their Ligier JS P2-Honda
    Le Mans-based endurance race car designer, Onroak Automotive, recently secured famous victories in the 2015 FIA World Endurance Championship with its LMP2 prototype race cars...
  • Accurately model real world road conditions using Exa simulations
    Exa's Dr. Brad Duncan is interviewed regarding how engineers can model ever-changing road conditions to best predict real-world performance using Exa's software, PowerFLOW, for accurate...
  • Simulation provides insight into fine details that physical prototypes cannot such as this underhood engine cooling airflow
    Exa’s Dr. Ales Alajbegovic discusses the limitations of vehicle physical testing. He describes how physical prototypes of vehicles are extremely expensive to produce and are often only...
  • Suppliers and OEMs are using simulation-driven design to achieve optimal design
    Exa’s Doug Hatfield discusses how commercial truck and automotive OEMs collaborate with their suppliers to optimize vehicle designs using simulation. With truck fleets seeking ever-...
  • Convertibles create a challenge for NVH engineers due to the increased turbulent airflow
    Convertibles made a bit of ‘noise’ at the Los Angeles Auto Show last week, with the unveiling of the Range Rover Evoque Convertible, Volkswagen Beetle Dune and Fiat 124 Spider. You could...
  • Exa PowerFLOW enables engineers to calculate how the turbulent vortices interact with the car and evolve around it, and accurately predict how dirt particles will behave.
    No car will stay clean, especially at this time of the year, but some cars unfortunately get filthy more quickly than others. So how do you figure out whether a new model is going to attract dirt in...
  • We’ve all experienced turbulence on an airplane, but back on terra firma those troublesome, swirling pockets of air can have just as great an impact on how a car moves along the road and how...
  • Simulation offers the hard numbers, provides exact insight into the cause or "why" certain results occur. Exa Corporation's Dr. Ales Alajbegovic explains how simulation-driven design...
  • In his ‘Confessions of a Capital Junkie’, Head of Fiat-Chrysler, Sergio Marchionne, paints the picture of an industry that increasingly struggles to make money. But the idea that car...
  • It’s been a three and a half year tease from Tesla CEO Elon Musk, but many will say it’s been worth the wait as the Model X was unveiled last night at the company’s...
  • Makers love SUVs because they’re a global phenomenon. The same car will be snapped up in Milwaukee, Milan or Nanjing with comparatively few changes. The resulting economies of scale are great...
  • Automakers are spending millions on technology-rich smart cars
    One of the amusements when holidaying in exotic countries has always been (for petrolheads anyway) spotting local versions of cars that the maker has long since stopped selling in your home market....
  • Optimization through simulation using Exa PowerFLOW
    Regulatory requirements for emissions reduction are increasing the importance of vehicle aerodynamics. A further reduction in drag is key: it’s thought that most OEMs are targeting a drag...
  • Not so long ago summer would have triggered an annual boom in convertible sales across Europe. But the region has fallen out of love with the drop-top, and numbers have almost halved since 2003....
  • It’s July, and getting hotter every day. Spending time in the car can provide a welcome respite from the soaring temperatures outside. That said, a car’s heating, ventilation and air conditioning (...
  • Exa Simulations Aide Complex Motorsports Engineering for Onroak Racecars
    The news out of Germany is that the owners of the Nürburgring have effectively banned timed runs, by insisting that manufacturers adhere to track speed limits. The desire to be fastest around...
  • Race car drivers feel the need for speed. Whether they’re hugging the curves at Circuit de la Sarthe or accelerating down the final stretch at Indianapolis Motor Speedway, race...
  • The emergence of autonomous cars will present many interesting technical challenges, not the least vehicle aerodynamics. Due to the nature of the problem, many of the aerodynamics challenges will...
  • As manufacturers seek to strip ever more weight out of vehicles to meet emissions standards, they’ve worked to ensure the thinner panels don’t deform at speed. But what if a certain...
  • A major theme, common to a number of manufacturers, at this year’s Geneva Motor Show was the continuing popularity of halo performance editions. Cars like the Ford GT supercar, Ford Focus RS,...
  •   Companies using cloud technology are accessing software that they previously did not have the bandwidth to support. Teams that are collaborating on common data in the cloud are gaining...
  • A-pillars used to be a simple strip of metal holding up the roof and providing a fixing point for the windscreen. Now they’ve become one of the most fiercely contested battlegrounds in the...
  •   Recently, the Wall Street Journal described the good times the auto industry is having in 2014. 16M units? That's really gonna be sumthin'. Remember 2009? The restructuring?...
  •   You know that old saying, "Close but no cigar?" That's how we felt after reading Car & Driver's first-ever aerodynamic "comparo." (You just gotta love the...
  •   Recently, Volkswagen's design boss, Walter De Silva, talked about some of the unfortunate choices that fuel economy requirements impose on design in an interview with Automotive...
  •   I have always been passionate about cars and car design ....but at my core I am an engineer and it is in my nature to solve problems; to fix what's broken, to care about the process and to...