mechanical ansys pressure tank simulation

[olympio]

First of all I apologize if I didn't introduce myself in the appropriate section, my muscatiello olympic and I am a graduate in mechanical engineering to the polytechnic of torino, doing a static analysis of a pressure tank with ansys mechanical, someone would know how I can select all the knots that have a certain coordinate in terms of roof?
In the Cartesian plan I would have used "nsel", but here I don't know exactly how to move.

thanks to everyone in advance.

 

[stefano.garbin]

change coordinate system. if your tank has as a z axis you can use the command "csys,1" and then use "nsel"

 

[olympio]

change coordinate system. if your tank has as a z axis you can use the command "csys,1" and then use "nsel"

Thank you very much I will try! !
In fact I did so: I selected the line and selected all the knots along that line with nsll, but I will also try your solution :finger: