Defining the loads of a pressure sensor + creating curved surfaces Answered

Hi there,

I'm a researcher at Glasgow Uni with relatively little OnScale experience and I'm having a little trouble when it comes to defining my loads for a passive sensor I have designed. Basically, the purpose of the sensor is to detect pressure waves from cavitating bubbles and the outputs I want are things like sensitivity and full width half maximum etc. However, I'm unsure how to load the model to input a pressure wave incident on the front face and output this data (i.e do I need electrodes etc). Any help would be greatly appreciated. the design is as shown below.

Also one last question - Is it possible to make a concave curved face sensor in OnScale designer that is exactly the same as this one, only concave? Any help would be greatly appreciated.

1 comment

  • Official comment

    Hi Ben,

     

    Welcome to the forum!

    For Analyst:

    To define pressure waves you need to use the plod command (see Command Reference for more details). You can create pressure waves using different methods; a surface of nodes (plod sdef), using a cylindrical surface (plod cyln), between two materials (plod sdf2) etc.

    You will also need to add electrodes to your sensor using the piez command. You can also create electrodes using different methods; a surface of nodes (piez node), between two materials (piez nod2) etc. Since this is a passive sensor your electrode connectivity will be open for one electrode and grnd for the other using piez bc.

    For Designer: 

    To define pressure waves you need to use either Surface (on a surface of CAD or primitive shape) or Geometry Interface (between two materials) Creation Mode

    You will also need to add electrodes to your sensor using either Surface (on a surface of CAD or primitive shape) or Geometry Interface (between two materials) Creation Mode. Since this is a passive sensor your Termination property will be Open for one electrode and Ground for the other.

    Analyst holds much more functionality than Designer that you may need. Here is our Analyst beginner's tutorial in case you are interested.

    With regards to the concave sensor, have a look at this example. Unfortunately this functionality is not yet implemented in Designer so let me know if you need any help understanding the code.

     

    Best Regards,

    Chloe

     

     

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