IncompressibleInertialCoupling

The IncompressibleInertialCoupling integrator implements a fluctuating hydrodynamics method for simulating particles coupled to an incompressible fluid. This integrator is a wrapper around the UAMMD ICM integrator.

For more details on the underlying method, please refer to the UAMMD ICM documentation.

---

• type: FluctuatingHydrodynamics, IncompressibleInertialCoupling

• parameters:

  • timeStep: real: Time step \([time]\)

  • temperature: real: Temperature of the system \([energy]\)

  • viscosity: real: Viscosity of the fluid \([pressure \cdot time]\)

  • density: real: Density of the fluid \([mass/distance^3]\)

  • hydrodynamicRadius: real: Hydrodynamic radius of the particles \([distance]\)

  • cellDimX, cellDimY, cellDimZ: int: Number of cells in each direction (optional)

  • sumThermalDrift: bool: Whether to sum the thermal drift term (default: false)

  • removeTotalMomentum: bool: Whether to remove the total momentum of the system (default: true)

Example:

"incompressibleICM":{
  "type":["FluctuatingHydrodynamics","IncompressibleInertialCoupling"],
  "parameters":{
    "timeStep": 0.01,
    "temperature": 1.0,
    "viscosity": 1.0,
    "density": 1.0,
    "hydrodynamicRadius": 0.5,
    "cellDimX": 32,
    "cellDimY": 32,
    "cellDimZ": 32,
    "sumThermalDrift": false,
    "removeTotalMomentum": true
  }
}

Note

If cellDimX, cellDimY, and cellDimZ are not provided, the integrator will automatically determine the cell dimensions.

Warning

This integrator requires that the particle group contains all particles in the system.