[gmx-users] Time varying electric field - phase term

[Johnny Lu]

I wonder if gromacs can do both sine and cosine?

If so, the sum angle formula can work.

http://en.wikipedia.org/wiki/List_of_trigonometric_identities#Angle_sum_and_difference_identities



On Sat, Aug 23, 2014 at 10:42 AM, steven shawn <shawnsteven1 at gmail.com>
wrote:

> Dear gromacs users, I am trying to use an electric field which is varying
> with time. I read the previous posts and successfully generated time
> varying electric field with E-xt, E-yt and E-zt.
>
> but I need an electric field which has an initial phase term (ie. of the
> form E= E0cos(2*pi*f*t+some angle term)) where i want to specify the angle
> term. Most of the posts i read mentioned this angle term must be specified
> in the third term after E-xt.
> I tried it but failed to generate an initial phase. Can anyone help me with
> this?
>
>
> thanks in advance.
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