I will define an element as one segment of the meshing along the line.
r = successive ratio tells you that each element's length is r times bigger than the element before it. Because this is defined on local coordinates (i.e. the positive direction along the line is defined by which node was selected first in drawing it), normally you have to specify the value, then reverse the direction if you don't like it. The lengths of each element are calculated
First length means that the first element (as defined by the local coordinate system) has the length that is specified; the remaining elements are sized according to the other parameters you choose.
Last length is the same as first length, except the last element on the line has the length that is specified.
You might want to use first/last length if you are wanting to specify a boundary layer or you know what the sizing is in another direction and you want to match it for a good mesh. Otherwise, you'll probably just randomly choose successive ratios until you're happy with the mesh.
I will define an element as one segment of the meshing along the line.
r = successive ratio tells you that each element's length is r times bigger than the element before it. Because this is defined on local coordinates (i.e. the positive direction along the line is defined by which node was selected first in drawing it), normally you have to specify the value, then reverse the direction if you don't like it. The lengths of each element are calculated
First length means that the first element (as defined by the local coordinate system) has the length that is specified; the remaining elements are sized according to the other parameters you choose.
Last length is the same as first length, except the last element on the line has the length that is specified.
You might want to use first/last length if you are wanting to specify a boundary layer or you know what the sizing is in another direction and you want to match it for a good mesh. Otherwise, you'll probably just randomly choose successive ratios until you're happy with the mesh.
I was going to answer to this question by Smak Sakthi because I had not seen Andrew P. Wandel 's answer. When I saw it, I realized I could not explain it better.
- Badges
- Science topic