hi . I am getting an error fLesGetHbrgEig ?

Aravind palaparthi_22503
Aravind palaparthi_22503 Altair Community Member
edited October 2022 in Community Q&A

I am getting an error when iam trying to run a simulation. It had run till some iterations.

 

image

I have attached a screen shot. please let me know what is the issue.

Thanks & Regards

Aravind

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Answers

  • acupro
    acupro
    Altair Employee
    edited October 2022

    Normally this could happen if there is some mismatch between the physics being solved and the Boundary Conditions - and/or lack of enough mesh.  The solution appears to be diverging for some reason.  Could be flow is approaching sonic/supersonic conditions, and indicated physics doesn't support it.  Could also be a mis-match in the dimensions/size.  Maybe the geometry values/sizes represent mm, but the material properties are in MKS (meter based), which can cause other issues.

  • Aravind palaparthi_22503
    Aravind palaparthi_22503 Altair Community Member
    edited October 2022
    acupro_21778 said:

    Normally this could happen if there is some mismatch between the physics being solved and the Boundary Conditions - and/or lack of enough mesh.  The solution appears to be diverging for some reason.  Could be flow is approaching sonic/supersonic conditions, and indicated physics doesn't support it.  Could also be a mis-match in the dimensions/size.  Maybe the geometry values/sizes represent mm, but the material properties are in MKS (meter based), which can cause other issues.

    hi, I am doing a external aerodynamic solution wind tunnel on 2 wheeler.

    I debugged it, in that I have found that I am  giving wind velocity and moving ground wall velocity in same direction.

     

    should I give moving ground wall in opposite?

    please let me know

  • acupro
    acupro
    Altair Employee
    edited October 2022
    Aravind palaparthi_22503 said:

    hi, I am doing a external aerodynamic solution wind tunnel on 2 wheeler.

    I debugged it, in that I have found that I am  giving wind velocity and moving ground wall velocity in same direction.

     

    should I give moving ground wall in opposite?

    please let me know

    If you're trying to approximate sitting on the 2 wheeler and having air blow at you and the ground moving past you, as in a wind tunnel with a moving belt, the inlet velocity and the wall/ground velocity should both be in the same direction.

  • Aravind palaparthi_22503
    Aravind palaparthi_22503 Altair Community Member
    edited October 2022

    Hi, I am getting some wrong results so, currently I am considering only inlet air flow.

    If you have any tutorial on this simulation which includes the moving ground wall, kindly send me a link.

    Also, I am facing some issues with setup. I tried to setup the model in old hyperworks classic.

    I am getting some symmetry warnings.

    I dont know old version properly.

    I have attached an image. kindly let me know what to do?imageimage

  • acupro
    acupro
    Altair Employee
    edited October 2022
    Aravind palaparthi_22503 said:

    Hi, I am getting some wrong results so, currently I am considering only inlet air flow.

    If you have any tutorial on this simulation which includes the moving ground wall, kindly send me a link.

    Also, I am facing some issues with setup. I tried to setup the model in old hyperworks classic.

    I am getting some symmetry warnings.

    I dont know old version properly.

    I have attached an image. kindly let me know what to do?imageimage

    Can you attach the .inp and .Log files?  Can you also post an image with description of the model - the BCs called out, etc?

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