The future of CFD is here...

Introducing CONVERGE – The industry leading CFD code for complex geometries with moving boundaries. Start using CONVERGE and never make a CFD mesh again.

Still making CFD grids?

CONVERGE is a revolutionary CFD code that eliminates the grid generation bottleneck from the simulation process.

CONVERGE CFD code automatically generates a high quality orthogonal mesh at run-time thus eliminating all user meshing time. CONVERGE automatically adds mesh resolution when and w here it is needed based upon field variables to maximize accuracy while minimizing the run-time. CONVERGE is loaded with the physical models for spray, turbulence and combustion needed to accurately simulate all engine types including Diesel, gasoline, hydrogen, natural gas, dual fuel and HCCI CONVERGE runs great in parallel.

    Increase Productivity
  • No user meshing time
  • Parallel speedup
  • Handle all geometry types
  • Handle moving parts automatically
  • Increase Accuracy
  • Orthogonal mesh
  • Adaptive mesh refinement
  • Grid scaling & embedding
  • Perform grid resolution studies without
    making any meshes
    Key Physical Models
  • SAGE detailed chemistry solver
  • Advanced turbulence (including LES)
  • Spray break-up
  • Droplet collision and coalescence
  • Multi -component vaporization
  • Combustion suite
  • Wall film
  • Genetic algorithm CONGO for optimization studies
  • Conjugate Heat Transfer
  • User routines for custom model implementation

Use CONVERGE CFD Software for In-Cylinder Spray and Combustion Analysis and Never Make a Mesh Again


The steps below outline the procedure for setting up and running a CONVERGE CFD simulation.

Step 1 - Import the CAD surface Step 2 - If necessary, clean the surface Step 3 - Flag boundaries

Import your STL surface (output from CAD) into the CONVERGE pre-processor. If the surface is clean, skip Step 2 and you’re almost finished!

Sometimes the CAD surface has minor problems that need to be fixed. The pre-processor has the tools to find and fix these problems.

Flag surfaces so that boundary conditions can be applied. Moving boundaries (e.g., valves) are just as easy to set up as stationary boundaries!

Step 4 - Modify simulation inputs Step 5 - Submit CONVERGE run Step 6 - Post-process the results

With CONVERGEyou have great control over inputs for numerics, mesh-refinement, sub-models, properties, and more. All of the inputs are thoroughly explained in our user manual.

Submit the simulation either in serial or parallel. To submit a parallel run, you only need to provide a list of machines to run on - the domain decomposition is handled automatically!

View the results using one of our post-processing options. Text data files for typical output quantities are also generated. These files can be easily plotted in standard plotting packages.

Notice something missing?

The process above shows all of the necessary steps for setting up and running a CONVERGE simulation. As you probably noticed, “creating a grid” is not one of these steps. That’s because with CONVERGE there is no user grid generation involved. The computational mesh is created internally in the CFD solver at runtime. The user still has ultimate control over mesh resolution, however, through features such as grid size scaling, fixed grid embedding, and adaptive mesh refinement. Furthermore, unlike traditional CFD codes, CONVERGE includes true geometry representation and so there are no geometry simplifications occuring in the code even if coarse grids are used.

The result is a CFD software package that reduces the total setup time for complex geometry simulations down to a couple of hours or less. And with the accuracy of a structured, Cartesian mesh, the ease of setting up moving boundaries, and state-of-the-art sub-models,CONVERGE is the clear choice for engineers, researchers and designers seeking high-fidelity solutions without the grid generation headache.