Since I am always being asked "what makes a good mesh?" I decided once again to blog about a list I put together a while ago. This was a general list, in no particular order, of things you can do, things you can use, and things you can look for, in creating a mesh. And knowing you have a good mesh, you can feel better about the results you are getting. This is part 1 in the series, and will discuss spotty results and number of elements.
The first thing you can do, and definitely the easiest, is to do a visual inspection of the results and ask yourself “Do they look spotty?” In the simple L-Bracket below, you can see how inconsistent the results are in the area of the fillet where we are seeing our high stresses. This erratic behavior across the length of the fillet is a good indication that your mesh is too coarse. Simply refine (make your mesh smaller) and rerun.
With just this simple observation and change, we can feel a little better about the accuracy of our results. Notice here how the results increase from 101 MPa to 103 MPa.
Number of Elements