Strange Waves in Shot Sleeve

ViV
ViV New Altair Community Member
edited October 2020 in Community Q&A

Hi,

 

how can I avoid the strange waves in the shot sleeve (see pictures)?

 

<?xml version="1.0" encoding="UTF-8"?>image.thumb.png.62dfbfde5744f30d3a31734a6e58e363.png

 

<?xml version="1.0" encoding="UTF-8"?>image.thumb.png.ef06fdd069fd292a5995d5fe689c33d7.png

 

Thank you in advance for your response.

 

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Answers

  • SouravDas0306
    SouravDas0306
    Altair Employee
    edited May 2020

    Hi ViV,

    Could you please let me know the velocity range and which version are you using ?

  • ViV
    ViV New Altair Community Member
    edited May 2020

    Hi Sourav,

     

    I run the simulations with version 2019.4.

    The velocity profile can be seen in the picture.

     

    image.png.1c160f2d006d8754895ecdddab89e735.png

     

    Best regards.

     

  • SouravDas0306
    SouravDas0306
    Altair Employee
    edited May 2020

    Hi ViV,

    I would suggest if you could reduce the element size and try, I hope velocity will not be a problem. ( try reducing the element size, check and let me know if you still get a strange wave). 

     

    Regards,

  • ViV
    ViV New Altair Community Member
    edited May 2020

     

    Hi Sourav,

     

    the waves are no longer so strange, but the element size is not acceptable for a Raw part (!).

     

    <?xml version="1.0" encoding="UTF-8"?>image.thumb.png.75880c0fbc26ee4028a3006ea2ac27ff.png

     

    Best regards.

     

  • SouravDas0306
    SouravDas0306
    Altair Employee
    edited May 2020

    Hi ViV,

     

    Oh! that's great, Can you tell me little details about the part, I can get back to you with the correct element size for the part, might be little helpful. 

     

    Regards,

     

  • ViV
    ViV New Altair Community Member
    edited May 2020

     

    Hi Sourav,

     

    Look at the pictures.

     

    Default values:   image.png.2de4995301834962fa51a24d44733f64.png

     

    Used values:       image.png.8dd75b3a3cd504f630ea0a18b2441322.png

     

    Best regards.

     

  • SouravDas0306
    SouravDas0306
    Altair Employee
    edited May 2020

    Hi ViV,

    For meshing shot sleeve, element size will be in some ratio with cast part elements. See it is defined 3mm element size in run dialog, then internally it calculate the element size for shot sleeve, it wont mesh with 3mm for shot sleeve.
     
  • SouravDas0306
    SouravDas0306
    Altair Employee
    edited May 2020

    ViV,

     

    One more thing ,As per implementation, we can define element size for cast part, for other parts, it calculate element size automatically or with ratio that is defined in mesh component matter since here we do auto meshing. 
  • ViV
    ViV New Altair Community Member
    edited May 2020

    Hi Sourav,

     

    Thank you for the explanation.

    When will be available ver. 2020.X?

     

    Best regards.

  • SouravDas0306
    SouravDas0306
    Altair Employee
    edited May 2020

    Hi ViV,

     

    May be by next week hopefully. 

     

    Regards,

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