Doubt with SPC in heat transfer (Steady State)

Altair Forum User

Hello again, 

 

I'm doing a tutorial, OS1080, and i didn't understand why is used SPC, with all the boxes of degrees of freedom uncheked. What the SPC is used for? The subcase is (Heat Thansfer (Steady State).  

I found something about SPC on Reference Guide. The first figure bellow.The Step 4, from tutorial, tell me to make this SPC. 

 

Thanks!

 

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Altair Forum User

Hi,

 

A structural constraint spc_struct is applied on the RBE2 element to fix the pipe on the ground. Two empty load collectors, spc_heat and heat_flux have been pre-created. In this section, the thermal boundary conditions and heat flux are applied on the model and saved in spc_heat and heat_flux, respectively.

 

Hope this helps /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20'> 

Karthic_22061

Hi @Prakash Pagadala,

 

Altair Forum User said:

Hi,

 

A structural constraint spc_struct is applied on the RBE2 element to fix the pipe on the ground. Two empty load collectors, spc_heat and heat_flux have been pre-created. In this section, the thermal boundary conditions and heat flux are applied on the model and saved in spc_heat and heat_flux, respectively.

 

Hope this helps /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20' />

 

1. What do you mean by thermal Boundary condition in above post, is it temperature ?

2. Why SPC with all the boxes of degrees of freedom unchecked ? does it mean Zero temperature ?

 

Thank you in Advance

Altair Forum User

Hi @Karthic

 

1) Yes,

2) Card edit the SPC and provide the temperature on the D entry of SPC.

Karthic_22061

Thank you Prakash /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20' />

Altair Forum User

Hi Prakash,

 

Can i set just INITIAL TEMPERATURE in a Steady State analysis?

 

Thanks in advance

Rahul Rajan_21763

You can use TEMPD in Linear static case.