Learning Forum

[Devarsh]

Hello

In the transient thermal simulation, I need to get the coordinates of the node at which the temperature is minimum. At that time-step, I used the Minimum probe on the temperature contour view, but could not select that particular node through nodal selection.

[Ashish Khemka]

You can see the node id and coordinates for the selected node at the bottom:

Regards Ashish Khemka

[Devarsh]

Hello Ashish
Thank you for the reply. However, my question was about selecting the node itself. The node of minimum value is in the middle of the geometry. When I try to select that node, only nodes on outer surface of the geometry (the outer surface of cylinder in the image)are selected. I cannot select the node IN THE CYLINDER itself. For example, in the figure I have shared, the selected node (green colored)looks to be near the minimum probe, but it actually is on the cylindrical surface and not on the section plane. I need to select the node that is at the minimum probe.
Can you suggest any method by which I can select the node which is inside the domain and not on outer surface? Or any other method to get the coordinates of the probed node?
Thanks!

[Ashish Khemka]

You can create a named selection for the node of interest.
Named Selections (ansys.com)
Regards Ashish Khemka

[Devarsh]

But to create a named selection, I need to select the node first, right? I am unable to select the node.
My problem includes a solid cylinder, in which I have a certain temperature (and stress) distribution. The minimum temperature in the cylinder occurs at the central axis at some height. I understand that I can get the coordinates of that node once I select it, or get complete thermal history of the node by creating a named selection. But, when I use node selection tool, I can only select nodes that are on the outer surface of the cylinder, I cannot select a node that is INSIDE the cylinder. I cannot create a named selection without "selecting" the node, edge or surface, right? So, how can I get around this?
Also, the link for named selection is not working for me. Could you give a short description how would that help select the node?
Thanks!

[Erik Kostson]

One can script this (sample script below runs in the script console - have in mind we do not provide any additional help with this it is just a sample that can be modified to perform a certain task):
---
sol=ExtAPI.DataModel.Project.Model.Analyses[0].GetResultsData
sol.CurrentResultSet=1000000 # last step

temp=sol.GetResult("TEMP")

mesh=ExtAPI.DataModel.Project.Model.Analyses[0].MeshData

meshIds = mesh.NodeIds

mintempif=1E9

for nodeId in meshIds:
tempnode=temp.GetNodeValues(nodeId)
if tempnode[0]<=mintempif:
mintempif=tempnode[0]
index=nodeId
Z=mesh.NodeById(index).Z
Y=mesh.NodeById(index).Y
X=mesh.NodeById(index).X

sol.Dispose
slMn = ExtAPI.SelectionManager

slMn.ClearSelection
sel = slMn.CreateSelectionInfo(SelectionTypeEnum.MeshNodes)

sel.Ids=[index]

nstempmin=ExtAPI.DataModel.Project.Model.AddNamedSelection() # named selection for lowest temperature node

nstempmin.Location = sel

---
or another way is to export the temperatures to excel sort by temperature and look a the node location and number - to do his one needs to set node location in options:


Then to export go to the temperature result right mouse button click and select export to excel:
And then locate the lowest temperature
say using the INDEX function in excel (say if we have 8282 nodes, the temps, in column E, node nr in A, the function in excel would be =INDEX(A2:A8282,MATCH(MIN(E2:E8282),E2:E8282,0)).
All the best

Erik