Learning Forum

[Mathilde31]

Dear everyone,

I would like to apply a heat flux which depends on the Z axis. I can defined a heat flux with tabular data but it is only depending on the time.

I tried to do it with an apdl command : I create a table, I read the file with my data, I write the data in the table and then I apply a heat flux with the values of the table. This doesn't work, the file cannot be read when I try to apply the heat flux.

I have also a polynomial function if needed to define the heat flux.

If someone know how to do it, please help me ! I am using Workbench 2019 R3.

Thank you

Mathilde

[Erik Kostson]

So it should work in general - the below x dependent feat flux works:

*dim,hftab,table,5,,,X
hftab(1,0)=0.0,0.25,0.5,0.75,1 ! x-pos.
hftab(1,1)=-100.0,-200.00,-300.0,-400.00,-500 ! - heat flux
CMSEL,S,HFBC,NODE
SF,ALL,HFLUX,%hftab%
ALLSEL,ALL

So define the table manually as done above, or if you do it via reading in a file, then see/search posts on how to do this:

There are many posts about this

Thank you

Erik

[Mathilde31]

Thank you very much for your answer.
It is working, except the line "CMSEL,S,HFBC,NODE", what is its purpose ? I found it in the help but I don't understand why you use it here.
To read a file, I know how to do it, I used *TREAD and VREAD but it isn't working. No worries, I will use your commands, it is easier :)

Mathilde

[Erik Kostson]

You are welcome - first we need to have/create a named selection (say of a face) in mechanical where we want to apply the flux, and that I called HFBC.

Once we have that we can use : CMSEL,S,HFBC,NODE, to select all the nodes on that face.

later in the SF command we use all, which apply to all nodes selected by the cmsel command.

All the best

Erik

[Mathilde31]

Perfect I understand !
Thanks a lot
Kind regards
Mathilde