CONVERGE v2.4 Beta Available for Testing

CONVERGE v2.4 beta from Convergent Science is now available. The goal is to make CONVERGE as innovative and user-friendly as possible, the company reports.

Highlights of CONVERGE v2.4:

• Steady-state solver: CONVERGE v2.4 contains a new steady-state solver, which is more stable for simulations that include combustion modeling.
• Moving reference frame: The moving reference frame (MRF) approach in CONVERGE allows you to simplify a simulation that includes moving geometry.
• Multithreading: Multithreading, which can be used to yield a memory reduction in most cases, is now supported. You can enable threading via the command line argument -T. Threading is disabled by default.
• Thermodynamic data file format: The thermodynamic data file can now accommodate the NASA-9 format.
• Surface chemistry: CONVERGE can model surface chemistry between a solid surface and gas phase species. Surface chemistry can be activated on stationary wall boundaries or in porous regions.
• NOx model: CONVERGE now contains the prompt NOx model.
• Mechanism tuning: CONVERGE includes a mechanism tuning feature that allows for automatic mechanism tuning using 0D (ignition delay and speciation) and 1D (laminar flamespeed) cases based on 1D sensitivity.
• 1D solver: Improvements have been made to the 0D solver. The 1D solver has an improved laminar flamespeed solver, a new PISO solver and a new hybrid option.
• ELSA: The Eulerian-Lagrangian Spray Atomization (ELSA) model is a spray injection model that combines Eulerian multi-phase modeling and Lagrangian particle tracking methods.
• Detailed urea decomposition model: CONVERGE includes a detailed urea deposition model, which was implemented jointly by Convergent Science and IFP Energies nouvelles. This model provides more detailed kinetics than the molten solid urea decomposition approach.
• DES models: CONVERGE contains two detached eddy simulation (DES) turbulence models: the Delayed DES and the Improved Delayed DES models.
• k-epsilon models: CONVERGE includes the v2-f and zeta-f turbulence models, both of which are RANS k-epsilon models.

Highlights of CONVERGE Studio v2.4 include updates to the Chemistry and Songo modules. The Chemistry module has a surrogate blender that can be used to develop surrogate fuels (simple fuels) that closely represent the physical properties or combustion properties of complex fuels. Plus, you can use an adjoint sensitivity analysis (ASENS) analysis to obtain data at the end time or the ignition point for zero-dimensional simulations. ASENS is much faster and generates much smaller file sizes when compared to 0D sensitivity analysis, according to the company.

The CONGO module is a new module in CONVERGE Studio v2.4. It can be used to import, configure and export input files for a CONGO genetic algorithm simulation with CONVERGE.

Download the CONVERGE and CONVERGE Studio release notes and manuals here for additional information about the latest version.

Sources: Press materials received from the company.