W​orkshops & Special Sessions

The Role of Blind Benchmarking in Validation

Results of several blind benchmarking studies in both CFD and FEA show that even experienced simulation engineers consistently fail to match physical test results. This suggests that if your primary means of solution validation is relying on a panel of experts, you could be in for a surprise! In this workshop, we’ll review some of these studies, discuss how blind benchmarking can increase the rigor of your simulations, and hold an open and frank interactive discussion session to summarize our findings and propose some ways forward.

Moderation: SGM Working Group


The 7 Levels of Validation

The concept of 7 levels of validation has been previously presented at NAFEMS events, and will be incorporated into future publications. But how it is working for users in industry? This workshop will look at real-life example of end-user validation efforts , looking at what worked well, and where there is most room for improvement.

Moderation: SGM Working Group


CFD 100: Past, Present and Future

In this session we’ll cast a reflective gaze on the evolution of Computational Fluid Dynamics (CFD) over the last 100 years and try to imagine what the future might hold for the discipline. To illustrate the evolution of CFD during the last century, NAFEMS CFD Working Group has constructed a timeline detailing the chronology of key contributions, starting with Lewis Fry Richardson (LFR) and his seminal work ‘Weather Prediction by Numerical Process’, which was published in 1922. In fact, there are several strands to the timeline representing the contributions from physical/fluid-dynamic, mathematical, numerical/ computational, algorithmic, and technological (computer) developments. The timeline will be presented and discussed, and delegates will be invited to volunteer their own thoughts and contributions. A structured open discussion will also consider the major issues for CFD in the current day, and speculate how CFD may evolve over the coming twenty years.

Moderation: CFD Working Group, Steve Howell (Abercus)


Uncertainty Quantification and Stochastics Enabled by Digital Continuity

Digital modelling and model based Engineering is currently a hot discussion topic in the engineering community. However, there is still a lot of disconnected processes in industry and most of the decisions are still based on reports. A lot of uncertainty quantification work is done in the various functional areas but an overarching end-to-end framework is missing. This topic is also relevant for the area of Machine Learning / Artificial Intelligence where models are fit to data and the uncertainties need to be aggregated, especially if these models are used in any autonomous systems activities. The panel will discuss industry trends and requirements in this area and will address questions from the audience.

Participants: Dietmar Vogt (Airbus), Alexander Karl (Rolls-Royce), David Riha (SwRI), Steve Legensky (Intelligent Light)

Panel Discussion: SPDM: Today's Challenges, New Capabilities and Upcoming Developments

Industrial practitioners, and vendors will share their point of view in 5 minutes and then respond to questions from the audience. The aim is to inform the audience about the state of the art and allow the audience to share their point of view with the panelists. A shared view of current challenges will provide valuable input to the NAFEMS SPDM Best Practices Focus Team's activities.


Workshop on Stochastics Challenge Problems: Including Data Uncertainty in Probabilistic Solutions

The focus of the Stochastics Working Group (SWG) is to champion and improve best practices that relate to stochastic engineering analysis and simulation methods and tools. By considering various sources and forms of uncertainty that exist in an engineering setting, the outcomes of virtual product development activities can be brought closer to the real world behavior of the modelled systems and components through the use of stochastic tools and methods. This will allow significantly more business value to be extracted from investments in engineering analysis and simulation. To promote discussion and challenge current practices and the state-of-art of stochastic methods related specifically to epistemic uncertainty (uncertainty in knowledge about a problem), the NAFEMS Stochastic Working Group has developed a pair of new challenge problems focused specifically on uncertainty in this form.

This workshop will provide a short summary of solutions to the current challenge problems from both the SWG and community submissions. Additionally, background theory and limitations of relevant methods, and results interpretation will be discussed.

Presenters: Ian Paulson, David Riha, Alexander Karl


Business Impact of Simulation

Moderation: Andy Richardson (Phronesim)


SPDM Best Practices Workshop

This a forum for SPDM practitioners from industry vendors and systems integrators to share opinions and experience on current technical issues, especially those which could lead to best-practice definitions and standards. The first topics are the core SDM data-model and a standardised approach to connecting interactive CAE applications to SPDM platforms using standard protocols and vocabularies. We will share presentations of possible standard decoupled approaches to CAE application integration and then discuss what a standard approach could look like.

Moderation: M. Norris (the SDM Consultancy), Steve Howell (Abercus)


ASSESS – reports from the ASSESS Congress

Reports and summaries from the ASSESS Congress 2023
Moderation: Joe Walsh (ASSESS)


ASSESS Discussion Session

Moderation: Joe Walsh (ASSESS)


ASSESS workshop on UMC4ES

Moderation: Joe Walsh (ASSESS)


The VMAP Standard for vendor-neutral CAE Data Storage (2 sessions)

Workshop on Technical Extensions and Interoperability

Organiser: VMAP Standards Community

The lack of software standards in virtual engineering workflows and incompatible interfaces for the transfer of simulation data not only cause additional costs and complex manual adaptation but also lead to inflexible IT solutions, loss of information and significant delays in the overall design process. The standardisation of data interfaces in CAE is therefore vital for all industry segments where simulation processes are central to the product and process design.

The VMAP CAE Data Standard was initially developed by a consortium of 29 partners from industry, software domain, and academia to enable the storage of simulation results in an open and vendor neutral format.

The VMAP Standardisation Community is actively discussing further extensions of the standard:

  • Full Model Data for a Restart of Simulation Runs
  • Handling Data from Online Sensor Systems and Physical Experimental
  • Integrating VMAP based simulation Workflows into manufacturing Digital Twins
  • and in more general enabling better interoperability between simulation and overall PLM systems

The requirement analysis and the extension of the VMAP standard specifications will be driven by small test cases and realistic use cases from industry.

The aim of this workshop is to discuss the needs and possibilities of such extensions together with user experts from different industry sectors and developers from software companies.

A short introductory lecture on the VMAP standard as well as short presentations on each of the extensions discussed will serve as a stimulus for an open technical discussion among all participants involved. The workshop will be open for any interested party and engineer.


The Rapidly Growing Initiative – A Valuable Community Resource for Next-Gen Simulation Usage

The democratization of simulation software is increasing the number of simulation users by an order of magnitude. Similar dramatic expansions of use of complex technologies have been witnessed in many other technology-driven industries such as the Internet, automobiles, personal computers, navigation systems, music devices, and mobile phones. In each of these cases, the real expansion occurs when the nascent, complex, hard-to-use technology is packaged into a form that is simple-to-use, robust, affordable, and accurate, and made available to everyone. But this turning point is never simple to accomplish and is hard to predict. However, when it does happen, it has always resulted in an explosion of investment and innovation, exposing the power of the underlying technologies to a much broader audience. With simulation, we are in the midst of experiencing that tipping point, driven by new market forces that consider the traditional, manual, error-prone, expert-only simulation status quo to be unacceptable – massive use of simulation in new technological advances such as autonomous driving, multidisciplinary design optimization of complex systems, and AI/ML require simulation automation, which is fundamental for the democratization process.

The free-to-join RevolutionInSimulation online community resource ( was launched at the NAFEMS CAASE conference in June 2018. This 4-year-old community now boasts over 4,000 global members and followers, with a steadily growing set of industry sponsors (>20) with leading names in the simulation ecosystem, and a growing list of topic areas related to next-generation simulation usage. It is becoming established as a valuable resource for the simulation community, as it strives to better understand, deploy and leverage next-generation simulation technologies for mission critical applications within their organizations.

Rev-Sim highlights professional resources and a collaborative community to help increase the impact and value of simulation investments through the Democratization of Simulation and simulation automation. Here you’ll have access to success stories, news, articles, whitepapers, blogs, presentations, videos, webinars, best practices and reference materials. Experts have volunteered to be Topic Moderators, curating the resources and authoring blogs on various important next-generation simulation topics such as Automation, Apps, Democratization, HPC, Business Challenges, Digital Twins, Digital Thread and SPDM, Digital Twins, Generative Design, and others. You’ll also have one-stop access to simulation specialists, industry organizations, special interest discussion groups, and industry media, along with software and consulting service providers to help you navigate these topics and deploy the new techniques.

The author will first present a brief history of simulation’s journey over the last 5 decades and then list the market forces that are driving fundamental changes in how simulation is packaged and used. Then, you will get a tour of the online Revolution In Simulation web portal.


Moderation: Malcolm Panthaki (Revolution in Simulation)

Managing CFD with an in‑House SPDM Solution

SPDM can be of great value in terms of supporting ISO 9001 certification, providing traceability and a secure system of record. Importantly, effective SPDM solutions enable time-saving by analysts at the point of use. It is critical to the adoption of an information system that it delivers tangible benefits to its target users, especially if those users are busy, expensive, mission-critical staff members. This workshop will describe and demonstrate how an SPDM solution helps an analyst to perform a CFD analysis, ensuring that data is only entered once and storing it for re-use so that further analyses can leverage work already done. An example from the moderators own experience will be demonstrated, and alternative solutions also discussed.

M​oderation: Steve Howell (Abercus)


P​latinum Sponsors

Dassault Systèmes

Gold Sponsors


Silver Sponsors

Digital Engineering

Media Sponsor

Digital Engineering

In-kind Sponsor

Digital Engineering

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