About the Workshop

Following the successful first workshop held in Oxford last year, we’re proud to announce that the 2nd Automotive CFD Prediction Workshop (AutoCFD 2) will be held again in 2021 in a hybrid format due to COVID-19 from the 26th to 27th August 2021. The workshop will furthermore be preceded by the Fourth International Conference in Numerical and Experimental Aerodynamics of Road Vehicles and Trains (AEROVEHICLES 4 ), and both the conference and workshop will be held during the same week.

We're delighted to announce that attendance in person will be offered for up to 20 people. If you can make the journey to Berlin, please feel very welcome to join us! Currently, 5 members of the workshop committee plan to attend in person. All you need to do is: Register Online (first come, first served!) . Thanks to our co-hosts, the TU-Berlin, we plan to use the same location as our partner event, AEROVEHICLES 4, which will be particularly convenient for people attending both. As for virtual attendance, in-person attendance of the AutoCFD-2 workshop will be free of charge (costs will be sponsored by Upstream CFD).


The main objective of the 2nd Automotive CFD Prediction Workshop is to assess the predictive capability of CFD codes for road-cars geometries. Through mandatory geometry, boundary conditions and computational grids the aim is to provide practical modelling guidelines to the automotive community e.g best-practice turbulence modelling, meshing, numerical schemes. In addition we want to bring the automotive CFD community (both academia and industry) together to discuss future directions.

Computing the test-cases is not required to attend the workshop but we strongly encourage everyone to consider submitting results.

If you wish to participate please send a short e-mail to admin@autocfd.org so a submission ID can be allocated.

Our data policy can be found here.

Dates

Deadline for notice of participation : 31th March 2021*
Kick-off meeting (virtual): 19th April 2021
2nd Q&A meeting (virtual): 9th June 2021**
Deadline for data submission : 23rd July 2021
Workshop : 26th and 27th August 2021
** join the mailing list or e-mail admin@autocfd.org to receive details of how to attend the call

Who Should Attend?

CFD Engineers, Aerodynamicists, Academics from Automotive OEMs, start-ups, software companies, academics from around the world

When and where?

26-27th August 2021 - Hybrid

Contact

Please contact the workshop organisers admin@autocfd.org to sign up and any queries about the test-cases/technical issues

Test Cases

Two test-cases will be available for participants to compute and submit to the workshop organisors to crossplot and summarize. Each participant who computes these cases will be given a 15 minute presentation slot to discuss their results.


Submission guidelines

Please e-mail your submission to admin@autocfd.org including your submission ID (which you should have been e-mailed). If the file is too large for e-mail, please include a link to a file transfer service or contact admin@autocfd.org for us to arrange access to one for you.


Case 1

Case 1 is the Windsor Body, which is a simplified vehicle like shape in wind tunnel conditions and is intended to capture the important flow-field structures without needing to model complex geometrical detail as is found in the second DriVAer case. The Windsor model, as developed by Steve Windsor of Jaguar Land Rover, used here has been modified to include a version with wheels. Further details are given in the (paper ) by Pavia et al. and the PhD thesis of Varney. These two cases have had extensive measurements taken at the Loughborough University wind tunnel at a Reynolds number of approximately 3 million (based on vehicle length). The full dataset is available here.

Two CAD definitions are provided for the with wheels (1A) and without wheels (1B) geometry. For each case, four standard meshes will be provided in a range of grid formats: low Re wall resolved RANS (WRRANS), wall modelled RANS (WMRANS), low Re wall resolved Eddy Resolving (WRER), wall modelled Eddy Resolving (WMER). For the WRER case, the high aspect ratio near the wall makes this suitable for DES and hybrid RANS-LES approaches, and it is not recommended to be used for a classic eddy resolving LES. A detailed description of the test case is available here (Version v0.5 - 18th June) and the kick off presentation slides here. . Links can also be found below for the post-processing instructions and an example set of files/templates to use for your submission.

Grids


Data Submission Instructions Example files/template
Case 1a - geometry STL STL
Case 1a - low Re wall resolved RANS (WRRANS) CGNS STAR-CCM+ OpenFOAM Fluent
Case 1a - wall modelled RANS (WMRANS) CGNS STAR-CCM+ OpenFOAM Fluent
Case 1a - low Re wall resolved Eddy Resolving (WRER) CGNS (v2) STAR-CCM+ OpenFOAM (v2) Fluent (v2)
Case 1a - wall modelled Eddy Resolving (WMER) CGNS (v2) STAR-CCM+ OpenFOAM (v2) Fluent (v2)
Case 1b - geometry STL STL
Case 1b - low Re wall resolved RANS (WRRANS) CGNS (v2) STAR-CCM+ OpenFOAM (v2) Fluent (v2)
Case 1b - wall modelled RANS (WMRANS) CGNS (v2) STAR-CCM+ OpenFOAM (v2) Fluent (v2)
Case 1b - low Re wall resolved Eddy Resolving (WRER) CGNS STAR-CCM+ OpenFOAM Fluent
Case 1b - wall modelled Eddy Resolving (WMER) CGNS STAR-CCM+ OpenFOAM Fluent

Case 2

Case 2 is the notchback version of the open cooling DrivAer. A detailed description of the open cooling DrivAer test case is available here (Version v6 - 6th July) and from the SAE Technical Paper 2021-01-0958 by Hupertz et al.. The workshop will focus on a closed cooling DrivAer configuration with static wheels and static floor. A comprehensive set of experimental data from the Pininfarina Wind Tunnel (Courtesy of Ford) including aerodynamic forces, surface pressure, velocity profiles and 2D flowfield measurements will be available for the correlation of CFD analyses presented at the workshop. Please see below for the meshes. The post-processing excel spreadsheet to enter your results can be found here (Version v15 - 6th July). Also the grid files for flowfield mapping in ANSA and Nastran format can be found here (Version v1 - 21st June).

Grids ( Readme )


Case 2 - Surface meshes STL ANSA JT Nastran
Case 2 - Wall-Function Grids CGNS OpenFOAM Fluent CFD++ Mesh statistics
Case 2 - low y+ grids CGNS OpenFOAM Fluent CFD++ Mesh statistics

Agenda

Please see here for the agenda (v7 - refresh browser for latest version). If you have any questions or requested corrections please contact the organisors.

Presentations

Presentations and videos (where available) from the 2nd automotive workshop are shown below. They were presented according to the agenda here .

Workshop kick-off - Neil Ashton (AWS)
Case 1 description and cross-plotting - Gary Page (Loughborough University) - Video-Case-Desc,Video-Cross-Plotting1 ,Video-Cross-Plotting2,Video-Cross-Plotting3
Case 2 description and cross-plotting - Burkhard Hupertz (Ford Motor Company) - Video-Case-Desc ,Video-Cross-Plotting1,Video-Cross-Plotting2 ,Video-Cross-Plotting3
Case 2 meshes - Vangelis Skaperdas (BETA-CAE Systems) - Video
Statistical error quantification - Charles Mockett (Upstream CFD)

Emmanuel Guilmineau - CNRS - Centrale Nantes - Video
Eugen Riegel - Numeric Systems GmbH
Marian Zastawny - Siemens Digital Industries Software- Video
Olivier Thiry - Cadence Design Systems
Hendrik Hetmann - Upstream CFD - Video
Francesco Fabio Semeraro - Politecnico di Milano
Samuel Gomez - Barcelona Supercomputing Center - Video
Walid Hambli - Imperial College London
Date Rentema - DAF Trucks
Christian Taucher - ICON Technology and Process Consulting Ltd.
Astrid Walle - Astrid Walle CFDsolutions
Gary Page - Loughborough University
Neil Lewington - Ford Motor Company
Lian Duan - The Ohio State University
Matthew Kronheimer - TotalSim US
Michael Emory - Cascade Technologies, Inc. - Video
Paul Batten - Metacomp Technologies, Inc. - Video
Liang Yu - University of Sydney
Arjun Yadav - Digital Solutions Inc. - Video
Shijun Chu - Tongji University - Video
Krishna Zore - ANSYS
Kaushik Reddy Mallareddygari - SankhyaSutra Labs Ltd.
Ondrej Cavoj - Skoda Auto + Brno University
Neil Ashton - Amazon Web Services - Video

Workshop Organisers

  • Charles Mockett (Upstream CFD) - Local Organiser
  • Gary Page (Loughborough University)
  • Neil Ashton (Amazon Web Services / University of Oxford)
  • Burkhard Hupertz (Ford)
  • Lian Duan (Ohio State University)
  • Timo Kuthada (FKFS)
  • Simone Sebben (Chalmers University)
  • Charles Ribes (Stellantis)
  • Iraj Mortazavi (CNAM)
  • Vangelis Skaperdas (BETA-CAE Systems)
  • Martin Passmore (Loughborough University)
  • Adrian Gaylard (Jaguar Land Rover)
  • Fabian Rösler (Audi)
  • Marco Kiewat (Audi)
  • Astrid Walle (CFD Solutions)

Registration and payment

Registration for attendees: Depending on whether you will be attending virtually or in-person, here’s what you need to do to register:

In-person: Registration for in person attendance has now closed.

Virtual: Please register for online participation using this form . Once completed, you will be sent the online meeting link.

Registration for contributors (providing simulation results for the test cases) has now closed. Attendance (both virtual and in-person) is free of charge.

1st Workshop

The 1st Automotive CFD Prediction Workshop was held on the 11-12th December 2019 in Oxford at St Anne's College. Three test-cases were studied; SAE Notchback geometry, DrivAer Fastback and DrivAer Estate vehicle which are described below Meshes were created for all cases in major grid formats i.e OpenFOAM, STAR-CCM+, Fluent, CGNS in addition to geometry and surface meshes. Participants who submitted results were allocated a 15 minute presentation slot however those who wished to present relevant material (i.e wind-tunnel campaign of the DrivAer model) without computing the test-cases were allowed to speak.

Three test-cases were available for participants to compute and submit to the workshop organisors to crossplot and summarize. Each participant who computes these cases will be given a 15 minute presentation slot to discuss their results. Full descriptions of these cases; SAE Notchback (Case 1 ), DrivAer Fastback (Case 2a ) and DrivAer Estate (Case 2b ) are available in prior links with geometry, surface meshes and volume meshes available to download from here. Meshes in all the major mesh formats i.e OpenFOAM, STAR-CCM+, Fluent, CGNS. Participants were encouraged to run the coarse, medium and fine meshes to demonstrate mesh convergence.

Experimental data for Case 1 was made available here which has the data itself and some instructions. Please refer to the main test-case description for complete information.

Final Agenda for the workshop is here:

Presentations from the 1st workshop are below

Case 1 - Test-Case Description, Meshing and Cross-Plotting Results - Loughborough University /Organisers
Case 2 - Mesh Generation - BETA-CAE Systems/Organisers
Case 2 - Cross-plotting- University of Oxford/BETA-CAE/Organisers
001 - Oxford/BETA-CAE/AWS
007 - ANSYS
011 - Barcelona Supercomputing Centre
012 - Metacomp
013 - Imperial College London
015 - Linköping University
020 - Siemens
022 - The Ohio State University
025 - PSA
026 - upstreamCFD
029 - University of Sydney

1st workshop organisers

* Neil Ashton (University of Oxford) * Gary Page (Loughborough University) * Vangelis Skaperdas (BETA-CAE Systems) * Owen Sinclair (University of Oxford) * William Van Noordt (University of Oxford) * Agata Dybisz (University of Oxford) * Martin Passmore (Loughborough University)

The organisers are grateful to Amazon Web Services for sponsoring this workshop. The organisers would also like to thank the UK Fluids Network and the Ground Vehicle Aerodynamics Special Interest Group (a EPSRC project funded under grant agreement EP/N032861/1) for early discussions on this workshop. In addition members of the UK Automotive Aerodynamics Forum have also given very useful input on the workshop.