Radiation S2S in Ansys Mechanical

tdsotmtdsotm Member Posts: 3
in Structural Mechanics

Hi,

is it possible to assign radiation to both sided of the shell using Enclosure Type=Perfect? In GUI I can see only "Top" and "Bottom".

S2S.png


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  • akhemkaakhemka Posts: 725Forum Coordinator

    Hi @tdsom,


    For perfect enclosure the surfaces must form an enclosed space so that the sum of view factors equals unity. You can select both Top and Bottom faces to define the radiation:


    image.png


    Regards,

    Ashish Khemka

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  • tdsotmtdsotm Posts: 8Member

    Hi @akhemka ,

    thank you for your help! I figured out that in Ansys 2019R2 there were only "Top" na "Bottom" options in GUI for Perfect enclosure. I've just installed 2020 and saw than in this version, "Both" option is also available.


    Maybe it will be helpful for somebody: In 2019 I used APDL commands to enforce radiation on both shell faces (for perfect enclosure)

    cmsel,s,Selection_Surface1 !Named selection on body named "Selection_Surface1"

    SFE,all,1,RDSF,1,0.6  !Face 1 of SHELL 131, emissivity 0.6

    SFE,all,1,RDSF,2,1   !Face 1 of SHELL 131, enclosure 1

    SFE,all,2,RDSF,1,0.6  !Face 2 of SHELL 131, emissivity 0.6

    SFE,all,2,RDSF,2,1   !Face 2 of SHELL 131, enclosure 1

    nsel,all

    allsel

    rsurf

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  • pedrocarneiropedrocarneiro Posts: 33Member

    How do you set the enclosure type to perfect instead of open?

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