Rough interface models

Interface model

The mathematical model for one interface must be specified through one of

ba.K_CorrelationModel
ba.LinearGrowthModel
K correlation model
ba.K_CorrelationModel(sigma, hurst, lateral_corr_length, max_spatial_freq=0.5)

where

  • sigma is the root-mean-square amptitude of out-of-plane (transversal) fluctuations,
  • hurst is a fractal exponent H with 0<H<1,
  • lateral_corr_length is the lateral (in-plane) correlation length,
  • max_spatial_freq is a cut-off.

This is the model of Palasantzas 1993. It adds a cut-off to the fractal roughness model of Sinha 1988.

Linear growth model
ba.LinearGrowthModel(particle_volume, damp1, damp2, damp3, damp4, max_spatial_freq=0.5)

This is the model described by Stearns 1993 and extended by Stearns and Gullikson 2000.