How to draw Rayleigh Saturation curve B(H) : parabole+straigh line

Andres Gil
Andres Gil New Altair Community Member
edited January 2022 in Community Q&A

Hello,

I have defined the material magnetic properties with the Rayleigh model (1 parabole for low H and 1 straigh line)

And I was trying do draw with excel the B(H) curve given by Flux.

User's guide gives this formula

(file:///C:/Program%20Files/Altair/2021.1/flux/Flux/Help/francais/UserGuide/Francais/topics/MateriauDouxIsotropeCourbeDeRayleighParaboleDroite.htm?hl=rayleigh)

image

But the graph doesn't look right at all for H>Hj.

If I make two changes (marked in red below), I get a much better approximation (still not so nice like in Flux)

image

image

 

Could someone please confirm me how Flux draws the B(H) caracteristic ??

 

Thank you

Andres

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Best Answer

  • Cyril Favre_21925
    Cyril Favre_21925
    Altair Employee
    edited January 2022 Answer ✓

    Hi Andres,

    you're right an error appears in the documentation, the formula to considered is the one displayed in the Flux interface when you defined the material. (picture attached)

    Thanks for the information we will modified the information in the help.

    Best regards.

    Cyril Favre

Answers

  • Cyril Favre_21925
    Cyril Favre_21925
    Altair Employee
    edited January 2022 Answer ✓

    Hi Andres,

    you're right an error appears in the documentation, the formula to considered is the one displayed in the Flux interface when you defined the material. (picture attached)

    Thanks for the information we will modified the information in the help.

    Best regards.

    Cyril Favre

  • Andres Gil
    Andres Gil New Altair Community Member
    edited January 2022

    Thank you, it works fine now !!

     

    Regards

    Andres

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