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Ahmad Elshenety

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Latest activity by Ahmad Elshenety
  • Ahmad Elshenety created a post,

    Calculate Strain in a Structure

    1. Community
    2. OnScale Lab (Desktop Application)

    I have an ultrasonic transducer in which I calculate the following calc     disp     strs     eqep total     pres acoustic     max aprs * pmax     end Then, I use the following code to calculate th...

    • 1 follower
    • 0 comments
    • 0 votes
  • Ahmad Elshenety created a post,

    higher order modes while using 2D axisymmetric model

    1. Community
    2. OnScale Lab (Desktop Application)

    If a 2D axisymmetric model is used to simulate the behavior of CMUT, then the FFT of the surface pressure is calculated after applying a ricker wavelet. Will we be able to detect the frequency of t...

    • Edited
    • 1 follower
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  • Ahmad Elshenety created a post,
    Answered

    Converting 2D model to 3D model

    1. Community
    2. OnScale Lab (Desktop Application)

    I have a 2D axisymmetric model. I wonder if I can convert it to 3D model using any functions such as revolve or any other function. Is this possible or I have to start a 3D model from scratch? I do...

    • Edited
    • 2 followers
    • 1 comment
    • 0 votes
  • Ahmad Elshenety created a post,
    Answered

    CMUT As A receiver

    1. Community
    2. OnScale Lab (Desktop Application)

    Hello, I'm designing a CMUT cell for immersion application. To check transmitted pressure, I do the following: 1- I apply a sinewave voltage signal to the top electrode (ctop) 2- I assign ground to...

    • Edited
    • 2 followers
    • 1 comment
    • 0 votes
  • Ahmad Elshenety created a post,
    Answered

    CMUT Collapse Voltage

    1. Community
    2. OnScale Lab (Desktop Application)

    I simulate a CMUT cell and in order to simulate the collapse voltage of the cell, I'm using a contact interface to avoid the touching of the membrane to the electrode. When I apply only pressure, t...

    • Edited
    • 2 followers
    • 1 comment
    • 0 votes
  • Ahmad Elshenety created a post,
    Answered

    Impedance curve doesn't show resonance

    1. Community
    2. OnScale Lab (Desktop Application)

    I'm simulating a CMUT cell where I excite it using a ricker wavelet to check the resonance frequency. When I press FFT for the displacement of the center of the membrane, I get the following curve ...

    • Edited
    • 2 followers
    • 1 comment
    • 0 votes
  • Ahmad Elshenety commented,
    1. Community
    2. OnScale Lab (Desktop Application)
    3. Contact Interface (Zero Volume Elements)

    Hello Chloe AllisonI'm still having the same problem. When I apply only pressure, the simulation is good. When I apply DC voltage, the simulation fails due to the error "bad area element". My gap i...

  • Ahmad Elshenety created a post,
    Answered

    Change Material Temperature

    1. Community
    2. OnScale Lab (Desktop Application)

    I'm now working on the following OnScale examplehttps://support.onscale.com/hc/en-us/articles/360009610992-CMUT-2D The example describes how to model a capacitive ultrasonic transducer where the ou...

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    • 2 followers
    • 1 comment
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  • Ahmad Elshenety created a post,
    Answered

    Contact Interface (Zero Volume Elements)

    1. Community
    2. OnScale Lab (Desktop Application)

    https://support.onscale.com/hc/en-us/articles/360020695751-8-Contact-Interface In this article authored by Chloe Allison, she mentioned how to get over the problem of Zero Volume Elements by using ...

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    • 2 followers
    • 2 comments
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  • Ahmad Elshenety commented,
    1. Community
    2. OnScale Lab (Desktop Application)
    3. Circular array of CMUT cells in 2D

    Chloe Allison Hello Chloe, Thank you so much for your comment and proposed solution. It helped a lot. I now have two questions.  1st question In my work, I usually measure properties of sound waves...