Body force dependent on dynamic custom parameter

[Morten Bjerg]

Hello everyone

I would like to introduce a DynamicValue() body force that changes in space and time. I see that it is easy to do if my force depends on local position and time available through sym.S.gx and sym.S.time. 

But what if I would like it to depend on my own parameter sym.S.myValue which I update every timestep with after_step()? Is it even possible?

Help would be much appreciated!

/Morten

[Marcin Kostur]

Hi

It will probably be not that straightforward, body force currently is
a constant or it depends analytically on time and space.
Those symbolic parameters are used once for code generation, and are
not synchronized after.

On the other hand, you can experiment on a bit lower level:
- with --save_src and --use_src, modify manually device code:
- replace a force component for the device __global__ .
- Then in after step you write/read between the host and the
device: runner.module.get_global('a_parameter')[0] and
cuda.memcpy_htod.

the best
mk

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[Morten Bjerg]

Thank you for the quick response and suggestion, Marcin!

/Morten

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