History Outputs names not respected

[ANYS]

History Output names in the model don’t correspond to History Output names in the result.

I have named History outputs according to the order of the surfaces from inside to outside so NH Output-1 corresponds to surface 1, NH Output-2 corresponds to surface 2, and so on,…

When looking at the result NH Output-1 corresponds to what was defined as NH Output-2 (The first on the model list).
Result NH Output-2 corresponds to NH Output-3 (The second on the model list) and so on…
Results end up mixed.

I’m using this pmx file as reference in case someone whants to reproduce the problem.

Radiation test case

Hi, I am testing another case found here and need now help interpreting the results: https://www.elmerfem.org/forum/viewtopic.php?t=5998 [sk] While the original case worked well, I slightly changed it by thicken the surface mesh to 0.2m to have a 3D model and replaced the temperature on surface S1 by a Surface flux of 1000W/m^2. The surface S1 is now 0.0879m^2. r1 = 0.07m ; r2 = 0.08m ; r3 = 0.14m ; r4 = 0.15m emissivity is 0.9 for both surfaces (S2/S3) with sink Temp. -1K Flux S1 = 1000W…

[Matej]

The .pmx file you reference has only two history outputs. I tested it and the results seems to be in the same order as requested.

Can you share your .pmx, which causes problems?

[ANYS]

Hi Matej,

The problem can be reproduced if you rename the NH_Outputs as follows:

[Matej]

You are right. I can confirm the bug. I will look into it.

[Matej]

I checked the code, and a big problem needs to be solved.

CalculiX does not support names for history outputs. So, the names exist only in PrePoMax. In Calculix, the names of the node sets are used to export data in a .dat file. So, the name of the history output depends on the name of the node set it is created from. Another fact is that the graphical representation of the history output in the results view is also based on the node set it is created from.

Now, the problem is how to uniquely connect one history output name with one node set name in PrePoMax. Currently, the user can have a history output with one name in multiple steps. Through these steps, the selection definition can be freely changed. With the selection definition changes new node sets are created (node set cannot be changed once it is created). This means that one name in pre-processing creates multiple names in post-processing. A problem!

The only solution I see is that I break the naming connection. The .dat results will get some name, based on the internal selection name, which is not connected to the name in the model tree. To determine which output is which, the user would have to graphically check the resulting history output representation.

Is there any other solution?

[FEAnalyst]

Abaqus doesn’t use the history output request names in postprocessing. It only shows the variable, element/node number and set name. It doesn’t even highlight them on selection but it would be nice.

[Matej]

Ok, I have changed the naming of the History Outputs.

The change occurs only for the history outputs created by selection. If selection is used the history outputs will get the name NODE_SELECTION-# or ELEMET_SELECTION-#. If the history output is created from the existing item, like a set/surface/reference point, the history output will have its name.

I also added support for highlighting the contact history outputs, which was missing till now.

Available in the version v2.1.12.

[Matej]

I am changing the topic as closed.