Dear all
My problem is, i would like to update position of a group (wall) in one direction, in each time step, independent of its own motion due to force interactions in all directions. It means they are in the time integration of specified ensemble for all directions, but i want to also add a constant position change in addition to their normal displacement.
Is there any easy way of doing this?
I started to use fix move command with style of variable.
Could someone can make it more clear the explanation of move command in manual as,
“If only the velocity variable for a component is specified as NULL,
then the displacement variable will be used to set the position of the atom,
and its velocity component will not be changed.
If only the displacement variable for a component is specified as NULL,
then the velocity variable will be used to set the velocity of the atom,
and the position of the atom will be time integrated using that velocity.”
At the first statement, the new position of atom depends on only the variable i set, then what is the point of unchanged velocity if it is not used to update position.
At the second statement, time integration only uses the velocity variable i assigned, then what is the point of setting the displacement as NULL. It becomes same with fix move command with style of linear.
Thanks
Murat Barisik
Research Assistant
Mechanical & Aerospace Engineering
Old Dominion University