Image 4: Redefine the Global Component Contact type.
I think that you could also just delete the Component Contact from the tree altogether, essentially making it to “allow penetration” or also known as free. What is needed is to change the Global Component Contact setting to either Allow Penetration or No Penetration, as in the image 4 below. So this is a good thing! But I haven’t yet shown you how work around this geometry, ahem, meshing issue. So SOLIDWORKS Simulation uses the Interference Detection tool on the CAD side of the house as a way to help prevent you from creating bad meshes. When the faces are just touching, this scenario is desired, but when bodies are interfering, you could collapse two nodes that shouldn’t be and it can create some gnarly looking elements (with bad shape functions) that you don’t want to put into a finite-element solver. When the Global Contact is defined as Bonded, then the meshing process will search for nodes from adjacent bodies now and try to collapse nodes that are close enough within the tolerance that you defined (or by default) in the mesh settings. In the next step of a Solid mesh, it knits all the surfaces together at the nodes that are overlapping from adjacent surfaces to create a water-tight solid and then a different volume-filling mesher fills it in. It’s interesting to note here that for a Shell mesh type, the meshing process stops here but not for a Solid mesh. In brief, the meshing process starts first by evaluating and meshing each surface of a body separately. Image 3: Bonded global contact is the culprit. A blog post maybe for another time.) To understand why the Global Bonded contact is the culprit in this case, you have to know a little bit more about the meshing process behind the scenes inside the software. (I contend that SOLIDWORKS is the best pre-processor for FEA out on the market. Typically the model geometry presented for a simulation is not be purpose-built for FEA but designed for another purpose, such as manufacturing. The problem isn’t really with the geometry, but with the default Global Contact condition set to Bonded.
#Flow analysis solidworks with two inlets how to#
Well, read on if you want to find out how to fix this situation in SOLIDWORKS Simulation without having to modify the geometry. So you click to view the interfering bodies, such as in Image 2 below, and now in this case you wish that you could simply hit the “Ignore” button and for it to all go away. Agghhh!Īnd I’m pretty sure that you have, so as you know it can be really frustrating. Image 1: Detected bodies that are interfering.
If you’ve ever run into the case where you get the following message, seen below in Image 1: “At least two bodies are interfering.