MAT4 Question...

Altair Forum User
Altair Forum User
Altair Employee
edited March 2022 in Community Q&A

Hi all,

 

I noticed today in the MAT4 (thermal properties) section of the materials panel that you can change values for k = and H = . I know that k stands for thermal conduction coefficient but does anyone know what the H exactly stands for? I'm not even sure what units might go with it either. I have searched online for material properties that have the symbol H but no such luck. Is it possible that the variable might be Greek but is substituted as H just for this software? Any help or tips on where to find the answer for this would be much appreciated, thanks!

 

Dylan Stelzer

                          [:-D]

Tagged:

Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited June 2015

    H is the convective heat transfer coefficient: W/m2 C

  • Rahul_P1
    Rahul_P1
    Altair Employee
    edited June 2015

    see  OptiStruct > Reference Guide > Input Data > Bulk Data Section:

    MAT4

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited October 2016

    Hello Guys...

    Hello Rahul,

     

    I have doubts regarding Thermal Heat Transfer Analysis. My Analysis is Transient Heat Transfer. So should I take only MAT4 only or Both Mat1 as well.

     

    My second doubt is I got error message of A dependent d.o.f. of rigid elements is constrained in a SPC Set.

     

    I used Tut: OS: 1090 Example...

     

    Please guide me...

    Thanks in advance

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited October 2016
    Altair Forum User said:

    My Analysis is Transient Heat Transfer. So should I take only MAT4 only or Both Mat1 as well.

    MAT4 card can be activated through MAT1. So you need to create a MAT1 first and within MAT1 use MAT4.

     

    Altair Forum User said:

    My second doubt is I got error message of A dependent d.o.f. of rigid elements is constrained in a SPC Set.

     

    I answered the same question in one of your other forum post. Please check.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited October 2016

    Thank you for you Reply...

     

    I also saw one comment from one of your colleague's communication regarding one Question (Rahul Ponginan) and so I only took MAT4 only. Because my guide also told me for Only Heat Transfer Analysis I Need only Mat4....

     

    Secondary can you just tell me how can I give higher heat Transfer on the top of my Profile and Lower on the bottom? so I can solve my Problem further ...

     

     

    Thank you,

     

    Best Regards,

    Jay

    <?xml version="1.0" encoding="UTF-8"?>Tutorial OS 1090.PNG

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited October 2016
    Altair Forum User said:

    Heat Transfer Analysis I Need only Mat4....

    Nayak Sorry I missed one of your commnets that you are doing only heat transfer analysis.

     

    If you have only Heat transfer and no structural analysis parametrs, you can just use MAT4 card.

     

    Altair Forum User said:

    Secondary can you just tell me how can I give higher heat Transfer on the top of my Profile and Lower on the bottom? so I can solve my Problem further ...

     

    I will check this and will let you know.

  • Gauri Mandekar
    Gauri Mandekar Altair Community Member
    edited March 2022
    Altair Forum User said:

    H is the convective heat transfer coefficient: W/m2 C

    What's the unit of k thermal conductivity?

Categories