When DesignModeler is a better choice than SpaceClaim
Rochester Institute of Technology Clean Snowmobile Team is an ANSYS sponsored team using Forte to predict engine emissions. RIT obtained the solid geometry from the engine manufacturer as a SOLIDWORKS (SW) file. I volunteered to help with geometry preparation to extract the fluid domain and partition the surfaces to make it ready for import into Forte.
Eric Oswald is a fifth year Mechanical Engineering student who is doing the Forte simulations.
Both DesignModeler (DM) and SpaceClaim (SC) can do the Fill operation to create a solid model of the fluid domain, but an important difference was revealed. DesignModeler and SOLIDWORKS both use the Parasolid geometry modeling kernel, while SpaceClaim uses the ACIS kernel. That means moving data from SW to DM is just a write and read operation, while moving data from SW to SC is a write, read and translate operation. Most of the time, this translation between the two kernels has no effect, but sometimes it causes a problem.
Below is the image of the inlet port as seen in DM and it looks the same in SW.
Here is the image of the inlet port as seen in SC. Note the spike defect just right of center.
In this case, I decided to use DesignModer to complete the geometry preparation!