Fwd: Adding gradient magnetic field to ferrofluid simulation

[Rudolf Weeber @ ICP]

-------- Weitergeleitete Nachricht --------

Betreff:	Re: Adding gradient magnetic field to ferrofluid simulation
Datum:	Fri, 6 Oct 2023 17:06:09 +0200
Von:	Rudolf Weeber @ ICP <weeber@icp.uni-stuttgart.de>
An:	debayan dasgupta <debayan.dasgupta@gmail.com>

Hi,

inhomogenous magnetic fields are currently not implemented.

However, support for other rasterized, interpolated fileds exists:

https://espressomd.github.io/doc/constraints.html#interpolated-force-and-potential-fields

It would be relatively easy to add a magnetic field.

This would involve adding two couplings

* a scalar product of <m,B> for the torque

* a field gradient term for the force

See src/core/field_coupling/ForceField.hpp

If you would like to contribute this freature, I can provide some more details.

Regards, Rudolf

Am 06.10.2023 um 16:17 schrieb debayan dasgupta:

Dear community,

Apologies since I think I am asking a very trivial question.

I have gone through the ferrofluid simulation and have played around with it. I would like to change the homogenous magnetic field to a spatially gradient field. I have tried to pass a matrix containing interpolated H_field with dimensions 'boxsize by boxsize', but it did not work for espressomd.constraints.HomogeneousMagneticField. 

Can someone point me to some documentation or help me with this?

I am new to MD and trying to simulate my experiments here.

Thanks,

Debayan