FlightStream® allows uou to mesh your CAD models in seconds, with a variety of meshing tools available for any type of solver need. These meshing tools are integrated within our in-house CAD library, and work directly on the CAD surfaces and curves, thereby preserving the geometrical fidelity at all times, whether you are coarsening the mesh or refining it. Since FlightStream® needs only a surface mesh for the solution, you do not need to generate a costly volume mesh. Further, the FlightStream® solver is based on surface vorticity sheets, which means that you do not need more than a few thousand faces for most configurations to get the high accuracy results. Finally, since FlightStream® works directly on unstructured meshes, you do not need the obsolete structured meshes that were once required by legacy panel codes. All this means that your surface meshes can be generated within seconds. And a few minutes after you imported your CAD model into FlightStream®, you are already setting up the physics and starting up the solver runs!
FlightStream® meshing has a motto: stay true to the CAD. Everything we do to mesh your CAD model, stays with this motto. Curvature refinement (both along curves and on surfaces) based in CAD allows you to refine (and then refine again, or coarsen back!) locally in regions of high curvature.
An example of this is shown here for the CRM model. Notice how the mesh is aligned to the curvature of the surface on the fuselage, and is refined further near the nose and near the cockpit windows. All of this is automated in FlightStream®. Point to a surface, and it shall be refined!
FlightStream® has tools designed to allow you to take full advantage of the swept surfaces on your geometry. Wings, stabilizers, fins, nacelles, pylons, cylindrical fuselage sections, and more! Anisotropic surface meshing allows you to specify the refinement in the directions that are useful, while keeping the mesh coarse in directions that do not benefit from the refinement. This keeps your mesh sizes small, your solver runs fast, and accuracy at its highest.
An example is shown on the left for the CRM model. The precise application of anisotropic meshing can allow you to often generate meshes that are a fraction of the typical isotropic meshes in terms of face count, and yet often lead to more accurate capture of aerodynamic loads and moments.
FlightStream® also allows you to generate two-directional anisotropic meshes on a given surface. Some surfaces, such as wings, benefit from anisotropic refinement both in the spanwise and chordwise directions. An example of this is shown for the CRM wing image on the left. Notice how FlightStream® has created refinements near the leading edge curvature, while thinning out the mesh towards the trailing edge in the chord-wise direction. Also note the anisotropy in the span-wise direction!
And if you prefer a script-based workflow, we have you covered. FlightStream® ships all of these meshing tools along with a rich API filled with easy-to-use functions. Write the script one time, place it within your design pipeline, and never have to return to it again!
FlightStream® used surface vorticity sheets, applied over an unstructured or structured, isotropic or anisotropic, surface mesh. Vorticity, as a fundamental fluid property, is robust. Very robust. At Research in Flight, we think this robustness is best encapsulated in how little time we spend meshing a geometry before its pushed down to the solver. You have probably noticed how coarse these images of the meshes are, and are probably wondering: "how is this mesh capable of generating accurate results?".
We at Research in Flight have been working with vorticity for years. And FlightStream® is the culmination of years of experience in the implementation of surface vorticity sheets as a method of evaluating flow over geometries in seconds. To this end, remember that FlightStream® uses vorticity sheets, unstructured though it is. This means that the meshes can be coarses, just so long as they capture the correct shape, curvature and positioning of the underlying geometry. An example of this is shown on the right for the CRM model's nacelle. The meshes are coarse by all measure of CFD standards today. And yet, this is an accurate mesh for vorticity.
If you would like to learn more about FlightStream®'s revolutionary new capabilities as a flow solver, contact us, and we will expose you to the fastest flow solver in industry today.