Surface nodes 1

[sauravd]

Greetings,

Is there a specific command to select the nodes on only the surface in the batch mode? Can we list these nodes? I am working on a 3-d model.

Thanks in advance

 

[cbrn]

Hi,
the second question is trivial once you can answer the first...
AFAIK, you have only one way to do that:
in your solid model, create a Named Selection of the envelope surfaces (Ansys Classical would call that a "Component" of "Areas"), then when you need it recall it with cmsel,s,<component_name> and in the end select all nodes belonging to the selected surfaces, with NSLA,s,1.

Regards

 

[sauravd]

Hi Cbrn,

This geometry is imported along with its mesh from ansys icem cfd so it deosn't have any defined geometry in the model. Can we define the areas in this imported geometry too?

I really appreciate your help.

Thanks

 

[cbrn]

Ah... no, AFAIK no.
When the "model" comes from an outside mesher, you don't in fact import any "model", just the "FE" portion of it. So the areas, lines, keypoints, volumes, are lost forever.
BUT... if you defined the Named Selections PREVIOUSLY, say in Workbench or ICEM or Fluent or CFX, then these WILL be transfered to Ansys with some rules: for example, a Named Selection made of Areas will be automatically "converted" into a Component made of NODES (and this is what you need, indeed), a selection made of Solids will result in a component made of elements, etc. These "conversions" should be described somewhere in the Help.
If you can't define Components / Named Selections at all, then you will be obliged to use some kind of selection based on coordinates or particular attributes...

Regards

 

[sauravd]

Hi Cbrn,

Thanks for your help. Now you made the problem quite clear for me.