Supplier Spotlight

Show Reviews

Automotive Testing Expo Europe 2017 Show Review

Click here to read

 

Automotive Testing Expo Europe 2016 Show Review

Click here to read

 

Automotive Testing Expo Europe 2015 Show Review

Click here to read

 

Automotive Testing Expo North America 2014 Show Review

Click here to read

 

Automotive Testing Expo India 2014 Show Review

Click here to read

 

Latest Video


RDE timelapse

LV

Horiba MIRA engineers prepare to carry out at a Real Driving Emissions test at the UK facility.

Click here to watch the video

Engineering down under

LV

Take a tour of the Australian Automotive Research Centre in Melbourne, which covers a 1,000ha area, and encompasses a raft of test roads and surfaces – including a 4.2km hot mixed surface road

Click here to watch the video

From a testing perspective, who stands to benefit most from PSA's acquisition of Opel?

Articles

« back to listing

Convergent Science improves CFD software

Recent enhancements in Convergent Science’s CFD software have enabled PSA Peugeot Citroën to substantially increase productivity

 

The company’s Converge software now offers fully automatic mesh generation, which eliminates the need for time-consuming manual meshing. The developers claim this can dramatically improve consistency between tests - with engineers on opposite sides of the planet now able to specify exactly the same criteria for the computer-generated mesh, where previously there was a degree of manual artistry involved.

Convergent Science has also integrated an adaptive mesh refinement (AMR) function in its software. Traditional packages typically generate a tetrahedral or polyhedral mesh before the start of the simulation and then stretch or skew it to suit changes during runtime. Converge uses a Cartesian cut-cell mesh, which is regenerated at every time step and coupled to both the flow and chemistry solvers.

As a result, Converge is able to continuously refine its mesh, adding more cells where increased accuracy is required, but reducing the cell count in less critical areas to speed up processing. In the case of an in-cylinder engine model, for instance, the simulation could have two million cells at bottom dead center and 100,000 cells at top dead center. More specifically, areas of interest such as the flow around the valves or the edge of the flame front can be modelled with increased accuracy without slowing down the rest of the simulation. This is claimed to provide unrivalled levels of speed and accuracy for simulations that include moving geometry.

A substantial number of major automotive OEMs now use Converge, including PSA Peugeot Citroën. Meanwhile, on the racing side, engine specialist Ilmor and NASCAR team Richard Childress Racing are among the company’s customers.

With the latest Version 2.3 release, Convergent Science is aiming to streamline the speed and efficiency of the package once again. It contains over 50 enhancements, including a variety of new geometry manipulation tools, new linear solvers, improved dynamic relaxation capabilities (relaxing the mesh in less critical areas) and a new surface chemistry solver capable of modelling molten-solid urea depletion.

PSA Peugeot Citroën has been using past iterations of the package for more than four years and the group’s manager for the modelling of energetic and combustion systems, Clément Dumand, said this self-meshing capability has substantially improved productivity.

“Generating the mesh automatically allows us to do 10 times more simulation cases than we could do previously. We needed something that efficient to evaluate the large number of configurations we want to try.”

Steve O’Connor, chief engineer at Ilmor Racing, says the introduction of Converge has prompted a step-change in the way the company manages its development process: “We’ve always used simulation, but to date it has supported our traditional approach of physically prototyping a part or concept and then trying it on the dyno. Our engineers heard about Converge and wanted to see if it really could be used to refine ideas faster to minimize our prototyping costs.

“At the moment, we are using Converge intensively to further optimize the combustion system of the Chevrolet IndyCar engine. The work is concentrating on the design of the inlet port, combustion chamber and piston crown with the aim of improving both the volumetric and combustion efficiency of the engine. The use of Converge has improved our understanding of the complex mechanisms that occur within the combustion chamber and has guided us along new avenues of development.”

Evaluating new concepts in the world virtual first and then cherry-picking a reduced number to test on the dyno has led to some dramatic improvements. On the IndyCar project alone, Ilmor says it has reduced the development time by 50% – around eight weeks – and resulted in a 75% reduction in prototype build costs.

February 17, 2016

 

Read Latest Issue
Read Latest Issue

Web Exclusives

Conti celebrates 50th anniversary of the Contidrom

The German tire giant looks back on 50 years of testing and development at its flagship facility
Click here to read more



Cruden launches new simulator technology

The system designed for ADAS and autonomous vehicle testing enables engineers to add as much hardware- or software-in-the-loop as they wish
Click here to read more



Q&A: Michael Guerrero, senior research engineer, Hyundai-Kia America Technical Center

Guerrero reveals details of a new component test methodology being developed at HATCHI
Click here to read more



Q&A: Dr Reza Bihamta, CAE expert, General Motors

Bihamta discusses the latest challenges in the simulation of joining techniques
Click here to read more



In-dummy data acquisition

Kistler’s digital transducer interface technology is enabling Continental Safety Engineering to yield data quicker and more accurately than ever before
Click here to read more




Supplier Spotlight

Supplier SpotlightClick here for listings and information on leading suppliers covering all aspects of the automotive testing industry. Want to see your company included? Contact jason.sullivan@ukimediaevents.com for more details.

فروشگاه اینترنتی فروشگاه اینترنتی سیستم همکاری در فروش ماهواره آنلاین اندروید کانال تلگرام چت روم دانلود فیلم فروشگظ;ه اینترنتی

Submit your industry opinion

Industry BlogDo you have an opinion you'd like to share with the automotive testing community? Good or bad, we'd like to hear your views and opinions on the leading issues shaping the industry. Share your comments by sending up to 500 words to john.thornton@ukimediaevents.com

Advertising

Recruitment AdTo receive information on booking an advertising banner please email jason.sullivan@ukimediaevents.com