Realis Simulation 2025.1
The 2025.1 release is now available to download. With the requirement to deliver lower emissions across multiple propulsion applications, engineers need to simultaneously design for new fuel compositions and continue to optimise existing IC engines for cleaner, more efficient performance.
In this rapidly changing environment, simulation software is central to answering the ‘What ifs’ when multiple design options make it impossible for expensive physical prototyping of all available scenarios. The new 2025.1 release further enhances the software tools to make workflows as fast, accurate and cost effective as possible, addressing a range of design challenges across fluid dynamics, mechanical structures and systems engineering.
Fluid Dynamics
Our 1D and 3D CFD fluid dynamics simulation tools enable engineers to optimise existing Internal Combustion Engines for maximum efficiency and lower emissions as well as modelling new clean combustion fuels used on their own or as part of a hybrid electric system with motors and batteries.
Modelling new clean fuel technology
This release introduces new predictive combustion capabilities to both WAVE and real-time WAVE-RT using detailed laminar/turbulent transition and stratification modelling. Additionally WAVE now uses fuel stratification modelling alongside predictive combustion, to significantly improve the accuracy of direct injection gas engine simulations, particularly when using hydrogen mix fuels.
In 2025.1, VECTIS provides enhanced heat transfer modelling for ICE thermal management by strengthening the link between CFD and the FE thermal analysis tool FEARCE-Vulcan to deliver more reliable thermal simulations in optimising engine block performance.
Faster, more optimised design for cleaner internal combustion engines
Following previous releases, rotary engine simulation is further improved in WAVE and WAVE-RT with enhanced leakage modelling.
VECTIS now offers even faster and more robust ICE solutions, with the Lagrangian solver significantly accelerated, delivering up to 70% time savings in spray dominated flows such as exhaust cooling, and up to 20% faster computations for rotary engine simulations.
Workflow improvements in WAVE and WAVE-RT include accelerated data inspection, simplified WaveBuild to R-Desk transition, and optimisation workflow improvements including automatic extraction and connection of varying model parameters in the R-Desk model tuner, greatly simplifying the setup process.
Improved workflow processes in VECTIS deliver enhancements to automation, process streamlining and simplified collaboration within teams making CFD analysis more efficient and user-friendly.
Structural Mechanics
Our structural mechanics simulation tools enable engineers to analyse temperature, friction, cylinder piston-ring and gearbox efficiency, optimising performance across existing and new fuel Internal Combustion (IC) engines.
Modelling new clean fuel technology
This release introduces significant productivity improvements using new coupled FE-CFD ICE coolant analysis in FEARCE-Vulcan, providing a method that automatically links with VECTIS 3D CFD to predict the coolant jacket thermal load. This delivers significant efficiency and accuracy improvements as it removes manual data exchange between CFD and FE models whilst guaranteeing the correct heat transfer between the two domains.
Faster, more optimised design for cleaner internal combustion engines
Faster mapping of VECTIS 3D CFD results is now achieved in FEARCE by mapping heat transfer data from VECTIS into FEARCE for FE thermal analysis, reducing the time by up to 95% when compared to previous releases. This change also reduces the overall solution time by 20% for FEARCE-Vulcan models using the recently delivered CFD-based exhaust port thermal model.
The 2025.1 release introduces an updated main bearing loading method for cylinder block structural analysis in ENGDYN, giving an improved distributed bearing load, compared with previous versions.
Further updates to the PISDYN-RINGPAK R-Desk plugin include the parametrisation of skirt and end gap profiles.
VALDYN sees updates including enhanced modelling of Roller Finger Followers (RFF), enabling users to easily include the bearing parameters within the model.
This release introduces a range of enhancements to SABR and SABR-Gear, including modelling the static behaviour of double row bearings, automated synchronisation of SABR-Gear files within SABR, reduced SABR-Gear memory usage enabling larger parametric studies, new export of bearing outer-race FE mesh with loads, and reuse of existing results to increase productivity.
Systems Engineering
Our systems engineering toolset, IGNITE supports the simulation of electric, hybrid and combustion technologies in conjunction with other Realis Simulation and third-party tools allowing engineers to model complete systems, focussing on minimising tailpipe emissions.
Faster, more optimised design of vehicle systems for reduced emissions
In this release of IGNITE, the user experience is significantly improved using enhanced animation with imported CAD-based shapes, providing realistic visualisation and better visual model validation using a range of easy to import CAD-based geometries.
2025.1 delivers efficient simulations using new solution profiling in IGNITE, enabling users to access granular performance metrics to gain deep insights into simulation efficiency, identify bottlenecks to pinpoint performance constraints in real-time, and provide comparative performance analysis. This enables informed trade-off decisions between the required accuracy and speed of the simulations.
Building on aftertreatment development in previous releases, IGNITE now includes faster catalyst configuration with dropdown selection. This delivers an intuitive user experience by offering simple configurations with dropdown selection options, reducing setup time and ensuring only valid combinations with pre-defined parameters are presented to the user to avoid unnecessary troubleshooting.
Application Toolkit
Our application toolkit is designed to create an infrastructure which optimises the use of simulation software making workflow processes as efficient and productive as possible. The toolkit comprises a set of pre- and post-processing tools and other utilities that are common, to facilitate effective use across Realis Simulation products.
Faster, more efficient and productive simulation workflows
The 2025.1 release introduces a number of key improvements across the workflow process. Alongside these, a new License Manager is introduced with an updated License Control Panel that supports multiple license providers, allowing users to manage their transition to the new License Manager by 2027. Meanwhile, the installer includes improved installation diagnostics enabling users to detect potential issues before installation by clicking an on-screen diagnostics button.
Within the workflow tools, there are further enhancements to the R-Desk session comparison tool, introduced in 2024.2, that focus on simplifying model troubleshooting and build tracking. R-Geometry has a number of simplified CAD pre-processing workflows, R-Post includes extended user data management to improve productivity, whilst R-Viewer has new workflow features for data management, focussed on those using the Structural Mechanics toolset to increase their productivity.