FixedHarmonic

Interactor/Bonds/Bond1/FixedHarmonic.cu

The FixedHarmonic potential applies a harmonic restraint between a particle and a fixed point in space.

\[U = \frac{1}{2}K(r - r_0)^2\]

where:

• \(K\) is the spring constant

• \(r\) is the distance between the particle and the fixed point

• \(r_0\) is the equilibrium distance

---

• type: Bond1, FixedHarmonic

• parameters: None

• data:

  • id_i: int: Id of the particle

  • K: real: Spring constant \([energy]/[distance]^2\)

  • r0: real: Equilibrium distance \([distance]\)

  • position: real3: Fixed point coordinates \([distance]\)

Example:

"fixedHarmonicBonds":{
  "type":["Bond1","FixedHarmonic"],
  "parameters":{},
  "labels":["id_i", "K", "r0", "position"],
  "data":[[0, 100.0, 1.0, [0.0, 0.0, 0.0]],
          [1, 100.0, 1.0, [1.0, 1.0, 1.0]]]
}