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Boundary Conditions
Posted: Mon Dec 18, 2017 2:05 pm
by CharMIC
Hej,
Would it be possible to define both time dependent cooling rates and time dependent thermal gradients in a single solidification simulation instead of a two fix values in MICRESS.
BR
Chamara
Re: Boundary Conditions
Posted: Mon Dec 18, 2017 2:31 pm
by ralph
Use the option 'linear' or 'linear_from_file' in the temperature boundary section.
That way, you can define can define values for the temperature at the bottom and the gradient in Z-direction for each given point of time. In between the given values, it will be interpolated linearly.
Like this:
linear
2 ! number of connecting points
1.0 ! time pt. 1
960 ! temperature pt. 1
20 ! gradient pt. 1
and so on ...
Cheers,
Ralph
Re: Boundary Conditions
Posted: Mon Dec 18, 2017 2:33 pm
by ralph
The file contains the values in columns:
# Time Temperature Z-Gradient
1.0 960 20
...
Ralph
Re: Boundary Conditions
Posted: Fri Apr 20, 2018 1:09 pm
by CharMIC
Hej,
Can you also import X,Y,Z position dependent thermal profiles for a 3D simulation in MICRESS?
BR
Chamara
Re: Boundary Conditions
Posted: Fri Apr 20, 2018 1:14 pm
by Bernd
Hej,
Unfortunately, this is not possible at present. From the internal data structure, MICRESS accepts only temperature differences in z-direction when concentration coupling is used...
Bernd
Re: Boundary Conditions
Posted: Thu Jul 05, 2018 9:59 am
by CharMIC
Hej,
I have question regarding 1D temperature profile in Z direction. I am doing some directional solidification simulation with time varying temperature profiles in Z direction. to reduced the computational time, I have reduced the domain size and use moving frame option. The question I have is will the temperatures be updated with respect to the correct height locations when the frame starts to move?
BR
Chamara
Re: Boundary Conditions
Posted: Thu Jul 05, 2018 6:08 pm
by Bernd
Hej Chamara,
No, this is not implemented like that, because it would be more complicated (although not impossible).
At present, unfortunately, the reference point is always the current bottom of the simulation domain...
A possible workaround:
You could use moving_frame with a fixed bottom temperature, and manually shift all profiles such that they start at the same temperature for z=0...
Bernd
Re: Boundary Conditions
Posted: Thu Jul 05, 2018 6:49 pm
by CharMIC
Hej Bernd,
I did not understand the method you suggested. Could you explain a bit more with a simple example
BR
Chamara
Re: Boundary Conditions
Posted: Thu Jul 05, 2018 9:23 pm
by Bernd
Hej Chamara,
I think I was a bit fast with this method. It cannot work because there is no reason why the frame should move at all under such conditions
Bernd
Re: Boundary Conditions
Posted: Fri Jul 06, 2018 8:15 am
by CharMIC
Hmmm.. thats a limitation then. But as you said it may be not difficult to implement?