Simple Helical Antenna by Jay Bee » 25 Jul 2023, 19:13 Hello all, I am very new to Elmer, and FEM in general, and after spending a lot of time on this problem I've decided to ask for some help. I would greatly appreciate any pointers and I suspect my mistakes will be obvious to you experienced users on the forums.
I don't understand why the results obtained in Elmer are pretty different from that ones of Matlab. I have used the same formula for the velocity profile but as you can see from the attached images, there is discrepancy. Particularly, the Elmer profile starts with the right form and next it decreases downwards. I attached everything, thanks in advance for your help. Mesh link: https://we.tl/t ...
I have installed Elmer from svn trunk in two machines. The first runs on Debian with openmpi installed by the package manager and runs fine (the machine has 8 cores, I tested different runs using up to 6 cores, never noticed any problem). The second is a Quadcore machine and uses openmpi 1.4 compiled by me with the following config options:
a few new binary packages in addition to the familiar installer. The packages are: o 32bit windows installer with GUI and compiler gfortran-elmer (gfortran 4.3.3) o 32bit windows .zip file (no installer, just unzip to your preferred location) with GUI but no compiler, compiled with recent MinGW default compiler (gcc 4.5.2 )
Elmer does not have T-splines (or other C1 continuous finite elements) and hence it uses 2nd order elements to approximate the residual which is not quite as good.