Boundary Layer with Mesh extrusion was not generated

Nazrin
Nazrin Altair Community Member
edited May 2022 in Community Q&A

Dear Experts,

I can't generate 2D Boundary Layer (BL) mesh when mesh extrusion was on (Fig 1 - Fig 2). Is there anything that i missed or is it a bug? This issue also has been brought by another user however no reply from the forum (https://community.altair.com/community?id=community_question&sys_id=3ac23a2c1b8f3c90507ca6442a4bcbf2). Attached is my .hm file for this case.

Fig 1: Mesh extrusion off. The BL was generated normally.
image

Fig 2: Mesh Extrusion on. Mesh was extruded but no BL generated
image

*Off topic, Since AcuConsole already in end-of-Life phase, I am in learning phase for HW CFD. This are a few of my inputs currently that may or may not be useful to be added into HW CFD in the future:

  1. Unit display for each parameter (speed, mass, etc) like AcuConsole.
  2. Additional mesh extrusion option. Currently mesh size was required for the input. Is it possible to add number of extrusion layer?
  3. Built in Frontal area calculator in HW CFD. The issue has been addressed 2 years ago and one of the forum user suggest to use virtual wind tunnel to get the frontal area. (https://community.altair.com/community?id=community_question&sys_id=c766803a1b2bd0908017dc61ec4bcb04&view_source=searchResult).
  4. User friendly GUI for wave boundary condition and additional type of wave such as regular, irregular, cnoidal, stokes, etc like Flow3D from Flow Science.

Thanks in Advance & Have a nice day!
Nadzrin

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Best Answer

  • acupro
    acupro
    Altair Employee
    edited May 2022 Answer ✓
    Nazrin_21804 said:

    Dear Acupro,

    I have downloaded the new version. However, I still have not successfully generate BL on my case using 'Edge BL" tools. Can you make an example video using my provided .hm file as attach in the main post? Thanks in advance.

    Things I did here:

    Apply Edge parameter for the size on the source edge itself (in place of the surface sizing)
    Deactivate surface BL parameters
    Apply Edge BL parameters (making sure it's on the source surface 'side' of the extrusion)

Answers

  • acupro
    acupro
    Altair Employee
    edited May 2022

    The BL 'imprint' is an existing limitation.  My understanding is that this will be partially addressed in the upcoming 2022 release - where an Edge Boundary Layer parameter will need to be specified.  It is targeted to be fully addressed in the 2022.1 release - where the surface BL parameter (without specifying edge BL) will be enough to get the BL imprinted.

  • Nazrin
    Nazrin Altair Community Member
    edited March 2022
    acupro_21778 said:

    The BL 'imprint' is an existing limitation.  My understanding is that this will be partially addressed in the upcoming 2022 release - where an Edge Boundary Layer parameter will need to be specified.  It is targeted to be fully addressed in the 2022.1 release - where the surface BL parameter (without specifying edge BL) will be enough to get the BL imprinted.

    Thank you for your explanation @acupro / @acupro. Since our university currently on requesting phase to get AcuConsole token from Altair, do you have any idea on how to generate 2D BL mesh other than using AcuConsole and HW CFD?

  • acupro
    acupro
    Altair Employee
    edited April 2022

    HyperWorks CFD 2022 (available via AltairOne / Connect) does have extrusion with boundary layers now - via 'Edge Layer' parameters.  I've attached a brief screen recording.

  • Nazrin
    Nazrin Altair Community Member
    edited April 2022
    acupro_21778 said:

    HyperWorks CFD 2022 (available via AltairOne / Connect) does have extrusion with boundary layers now - via 'Edge Layer' parameters.  I've attached a brief screen recording.

    Dear Acupro,

    I have downloaded the new version. However, I still have not successfully generate BL on my case using 'Edge BL" tools. Can you make an example video using my provided .hm file as attach in the main post? Thanks in advance.

  • acupro
    acupro
    Altair Employee
    edited May 2022 Answer ✓
    Nazrin_21804 said:

    Dear Acupro,

    I have downloaded the new version. However, I still have not successfully generate BL on my case using 'Edge BL" tools. Can you make an example video using my provided .hm file as attach in the main post? Thanks in advance.

    Things I did here:

    Apply Edge parameter for the size on the source edge itself (in place of the surface sizing)
    Deactivate surface BL parameters
    Apply Edge BL parameters (making sure it's on the source surface 'side' of the extrusion)

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