Fluids

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How to measure the velocity inside the rotating tube?

    • luna6362
      Subscriber

      Hi,I am simulating a compressor.

      And I need to know the velocity in the rotating tube inside my compressor.

      I used Probe and enter the coordinate to see the answer.

      But the coordinate can't move arround with the rotating tube.

      The other problem is I don't know the coordinate after my model rotates.

      So I can't use Probe to see what I want to know.

      Is there any better method to see the velocity inside the rotating tube?

      Thank everyone who want to help me!

    • Federico
      Ansys Employee

      Hello Luna?

      Can you show a screenshot of what your model looks like? What is this tube exactly, and is it rotating about its axis?

    • luna6362
      Subscriber

       

      Hello Federico Alzamora Previtali

      Thank you for your reply!

      Sorry that I forgot to add screenshots on my post.

      Here is my model’s screenshot.

      I circled the rotor in my compressor(the yellow one model).

      I had hiden some components to that it be clearly.

      And the tube looks like this by the side.

      I need to measure velocity inside the yellow tube.

      And my rotor rotates along axis successfully.

      This is the screenshot at 1s.

      This is the screenshot at 2s.

       

    • Rob
      Forum Moderator

      To clarify, you want to add a monitor that's somewhere in the fluid zone and moves with the rotor? 

    • luna6362
      Subscriber

      Hello Rob.

      Yes,that is exactly what i want to do.

      But I am not sure which function is the best choice.

      Thank you so much.

    • Rob
      Forum Moderator

      Moving monitor points isn't practical. However, using a register to separate a single cell to monitor is. 

    • luna6362
      Subscriber

      Thank you so much,Rob. I will try it.?

    • luna6362
      Subscriber

      Hello Rob. Sorry for disturbing you again.

      I am wondering is this tutorial show what you tell me before?

      https://www.youtube.com/watch?v=JAnCibZmGJg

      And I want to ask you that can i use register to see the velocity after the calculate compliete?

      Really appreciate again!

    • Rob
      Forum Moderator

      Mostly, except you are going to split the mesh using the register. That will give you a small region to monitor whatever you want on. 

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