heat flux

Unknown
Unknown
edited March 2023 in Community Q&A

Hi all,

In this acuTrans manual, I see the following. 

image

image

The unit of heat flux should be W/m2. Just curious, what the above gives when I integrate it over a surface using UDF? I want to extract total heat using the above. Am I doing it correctly using the above ?

 

Thanks and  regards,

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Best Answer

  • ydigit
    ydigit
    Altair Employee
    edited March 2023 Answer ✓

    I think your interpretation is correct. 

    AcuProbe also lists the unit of integrated heat_flux as "W" (watts) 

    image

Answers

  • ydigit
    ydigit
    Altair Employee
    edited March 2023 Answer ✓

    I think your interpretation is correct. 

    AcuProbe also lists the unit of integrated heat_flux as "W" (watts) 

    image

  • Unknown
    Unknown
    edited March 2023
    ydigit_21275 said:

    I think your interpretation is correct. 

    AcuProbe also lists the unit of integrated heat_flux as "W" (watts) 

    image

    Thank you.

  • acupro
    acupro
    Altair Employee
    edited March 2023
    ydigit_21275 said:

    I think your interpretation is correct. 

    AcuProbe also lists the unit of integrated heat_flux as "W" (watts) 

    image

    I would also agree.  The 'q' in the acuTrans docement equation above is the nodal value - W/m^2.  When we integrate that over the area we get W/m^2 * m^2 - leaving W for the units of the surface integrated heat flux.  That surface integrated heat flux is the quantity used in the user functions for UDF_OSI_HEAT_FLUX.

  • Unknown
    Unknown
    edited March 2023
    acupro_21778 said:

    I would also agree.  The 'q' in the acuTrans docement equation above is the nodal value - W/m^2.  When we integrate that over the area we get W/m^2 * m^2 - leaving W for the units of the surface integrated heat flux.  That surface integrated heat flux is the quantity used in the user functions for UDF_OSI_HEAT_FLUX.

    Thank you, so it is surface integrated heat flux.

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