## Can I reference total mass or mass of a body in a user defined function?

ScientistRenzo
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### Can I reference total mass or mass of a body in a user defined function?

Hello !

I'd like to apply 10 Grey = 10 J /kg by using the heat source.
Heat source is in W/kg, so that is (J/s)/kg.
I've chosen my mass to be 1 kg.
So I have creative freedom, and I can apply Heat Source = 1 for 10 seconds, or Heat Source = 10 for 1 second, in order to apply 10 J/kg to my 1 kg model.

Let's say my mass is 2 kg, so I need to apply Heat Source = 2 for 10 seconds, or Heat Source = 20 for 1 second

I'd like to parameterize my user defined function.

So let's say I want to apply 10 Grey to my model, using a user defined function (in fortran) where Heat Source = "x"

Is there some way to reference the total mass, or mass of a body in Elmer, so I can do Heat Source = 10 * mass, which would get the goal completed.

Please excuse me if it's somewhere in the manuals, it was easier and nicer to ask.

Thanks !
raback
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### Re: Can I reference total mass or mass of a body in a user defined function?

Hi

You could use the keyword:

Code: Select all

``````Volumetric Heat Source = ...
``````
that should be in units W/m^3.

-Peter
ScientistRenzo
Posts: 55
Joined: 14 Mar 2021, 21:01
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### Re: Can I reference total mass or mass of a body in a user defined function?

Peter if you don't mind checking this post, viewtopic.php?f=7&t=7430&p=24797#p24797