Wednesday, September 3, 2014

5 Tedious CFD Chores You Can Skip with HanleyCFD

The hallmark of any process innovation is the elimination of a significant step (or number of steps) from the workflow and yet maintain (or improve) the high standards of the final product.  Hanley Innovations CFD products (HanleyCFD) remove the grid generation step from your workflow during the computational fluid dynamics, CFD, analysis of your product.  This speeds up the design process and gives you an advantage over the competition.

Since saying automated gridding is a honor that all software can boast (we are using a computer for CFD after all), here are 5 tasks and worries  you can definitely leave behind when you analyze your designs using HanleyCFD.

1.  Grid Quality Worries
There is no need for worrying about grid quality.  Every single cell in a HanleyCFD grid is Cartesian, i.e.a rectangular hexahedron (my old notes from 18.335 say that these are the best grids for CFD). Furthermore, there is no overhead in transforming the 3-D Navier-Stokes and Euler equations to conform to a surface fitted grid.  You can solve them the way nature intended (in Cartesian form).

Comparison of Cartesian Euler Solver & Potential Flow in MultiElement Airfoils 5.

2. Small Features Can Stay
A small nick, scratch or bump on a CAD surface mesh can send an extrusion based grid generation process awry.  It is the painful equivalent of bare footing a tack (or Lego piece) on an otherwise smooth floor.  With HanleyCFD, there is no need for a time consuming cleanup of the CAD surface. Small features can stay and save you time in the analysis work flow.

3. Dealing with Small Acute Angles & Paper Thin Surfaces in the Geometry
You can just ignore these cute little triangles with HanleyCFD.  CFD based on tetrahedral grids can have accuracy problems if they encounter these features.  Increasing the mesh resolution can often exacerbate the problem and lead the solver down an endless inverted oblivion. The following  video shows how Stallion 3D,  the HanleyCFD flagship, deals with a geometry mired in small acute angles.

Watch this video to see the workflow from analyzing difficult geometries.

4.  The Debate Over Important Geometry Features
HanleyCFD helps you to avoid the long debate (with yourself or team members) whether or not a geometry feature is important to the analysis and the physics of the flow.  Keeping a feature translates to more time performing the mesh generation. By removing the feature, you can miss an important physical result.  HanleyCFD will analyze the feature without the extra time spent for mesh generation.

5.  Modification of the Geometry That's in your Mind
Too often, you are forced to modify your design to appease cost and time constraints of the analysis workflow.  With HanleyCFD, you have no problems analyzing the concepts that can change the world.

Stallion 3D analysis of Wright Flyer (TurboSquid model).

HanleyCFD and Stallion 3D can be purchased at  Please call us at (352) 240-3658 for more information.

Thanks for reading.

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