Package etomica.potential

Class P1HardMovingBoundary

java.lang.Object

etomica.potential.Potential

etomica.potential.Potential1

etomica.potential.P1HardMovingBoundary

All Implemented Interfaces:

Drawable, IPotential, IPotentialAtomic, PotentialHard

public class P1HardMovingBoundary
extends Potential1
implements PotentialHard, Drawable

Potential that places hard repulsive walls that move and accelerate subject to an external force field (pressure).

Nested Class Summary

Nested classes/interfaces inherited from class etomica.potential.Potential1

Potential1.Intramolecular

Field Summary

Fields inherited from class etomica.potential.Potential

space

Fields inherited from class etomica.potential.Potential1

boundary

Constructor Summary

Constructors

Constructor	Description
P1HardMovingBoundary(Space space, Boundary boundary, int wallDimension, double mass, boolean ignoreOverlap)	Constructor for a hard moving (and accelerating) boundary.

Method Summary

Modifier and Type	Method	Description
void	advanceAcrossTimeStep(double tStep)
void	bump(IAtomList atoms, double falseTime)	Implements the collision dynamics.
double	collisionTime(IAtomList atoms, double falseTime)	Computes the time of collision of the given atom(s) with the hard potential, assuming no intervening collisions.
void	draw(java.awt.Graphics g, int[] origin, double toPixel)
double	energy(IAtomList a)	Returns the interaction energy between the given atoms.
double	energyChange()	returns change in potential energy due to the last collision
double	getCollisionRadius()	Distance from the center of the sphere to the boundary at collision.
Dimension	getCollisionRadiusDimension()	Indicates collision radius has dimensions of Length.
double	getForce()
Dimension	getForceDimension()
double	getMass()
Dimension	getMassDimension()
double	getPressure()
Dimension	getPressureDimension()
double	getWallPosition()
Dimension	getWallPositionDimension()
double	getWallVelocity()
Dimension	getWallVelocityDimension()
boolean	isStationary()
double	lastCollisionVirial()	Value of the virial from the most recent collision.
Tensor	lastCollisionVirialTensor()	not yet implemented.
double	lastWallVirial()
void	setCollisionRadius(double d)	Distance from the center of the sphere to the boundary at collision.
void	setForce(double f)
void	setMass(double mass)
void	setPressure(double p)
void	setStationary(boolean b)
void	setThickness(double t)
void	setWallPosition(double p)
void	setWallVelocity(double v)

Methods inherited from interface etomica.potential.IPotential

getRange, nBody, setBox

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from class etomica.potential.Potential

nBody

Methods inherited from class etomica.potential.Potential1

getRange, setBox

Constructor Detail

P1HardMovingBoundary

public P1HardMovingBoundary(Space space,
                            Boundary boundary,
                            int wallDimension,
                            double mass,
                            boolean ignoreOverlap)

Constructor for a hard moving (and accelerating) boundary.

Parameters:

space -

wallDimension - dimension which the wall is perpendicular to

Method Detail

setWallPosition

public void setWallPosition(double p)

getWallPosition

public double getWallPosition()

getWallPositionDimension

public Dimension getWallPositionDimension()

getWallVelocity

public double getWallVelocity()

setWallVelocity

public void setWallVelocity(double v)

getWallVelocityDimension

public Dimension getWallVelocityDimension()

setForce

public void setForce(double f)

getForce

public double getForce()

getForceDimension

public Dimension getForceDimension()

setPressure

public void setPressure(double p)

getPressure

public double getPressure()

getPressureDimension

public Dimension getPressureDimension()

setStationary

public void setStationary(boolean b)

isStationary

public boolean isStationary()

getMass

public double getMass()

Returns:

Returns the mass.

setMass

public void setMass(double mass)

Parameters:

mass - The mass to set.

getMassDimension

public Dimension getMassDimension()

energy

public double energy(IAtomList a)

Description copied from class: Potential

Returns the interaction energy between the given atoms. There might be 0, 1, 2 or more atoms in the AtomSet.

Specified by:

energy in interface IPotentialAtomic

Specified by:

energy in class Potential

energyChange

public double energyChange()

Description copied from interface: PotentialHard

returns change in potential energy due to the last collision

Specified by:

energyChange in interface PotentialHard

collisionTime

public double collisionTime(IAtomList atoms,
                            double falseTime)

Description copied from interface: PotentialHard

Computes the time of collision of the given atom(s) with the hard potential, assuming no intervening collisions. Usually assumes free-flight between collisions.

Specified by:

collisionTime in interface PotentialHard

bump

public void bump(IAtomList atoms,
                 double falseTime)

Description copied from interface: PotentialHard

Implements the collision dynamics. The given atom(s) is assumed to be at the point of collision. This method is called to change their momentum according to the action of the collision. Extensions can be defined to instead implement other, perhaps unphysical changes.

Specified by:

bump in interface PotentialHard

lastWallVirial

public double lastWallVirial()

lastCollisionVirial

public double lastCollisionVirial()

Description copied from interface: PotentialHard

Value of the virial from the most recent collision.

Specified by:

lastCollisionVirial in interface PotentialHard

Returns:

double virial value

lastCollisionVirialTensor

public Tensor lastCollisionVirialTensor()

not yet implemented.

Specified by:

lastCollisionVirialTensor in interface PotentialHard

Returns:

Tensor

setCollisionRadius

public void setCollisionRadius(double d)

Distance from the center of the sphere to the boundary at collision.

getCollisionRadius

public double getCollisionRadius()

Distance from the center of the sphere to the boundary at collision.

getCollisionRadiusDimension

public Dimension getCollisionRadiusDimension()

Indicates collision radius has dimensions of Length.

advanceAcrossTimeStep

public void advanceAcrossTimeStep(double tStep)

setThickness

public void setThickness(double t)

draw

public void draw(java.awt.Graphics g,
                 int[] origin,
                 double toPixel)

Specified by:

draw in interface Drawable