Block MODEL_PHYSICS

This block defines the specific variables related to physics in the FALL3D model

  1. LIMITER = (options)
    • Flux limiter option
    • Input options:
      • MINMOD: MINMOD option
      • SUPERBEE: SUPERBEE option
      • OSPRE: OSPRE option
  2. TIME_MARCHING = (options)
    • Time integration scheme
    • Input options:
      • EULER: Euler (1st order)
      • RUNGE-KUTTA: Runge-Kutta (4th order)
  3. CFL_CRITERION = (options)
    • Courant criterion (critical time step)
    • Input options:
      • ONE_DIMENSIONAL: Minimum for each dimension
      • ALL_DIMENSIONS: Minimum for all dimensions (default)
  4. CFL_SAFETY_FACTOR = (float)
    • Safety factor for critical time step
    • Optional
    • Note: Default = 0.9
  5. TERMINAL_VELOCITY_MODEL = (options)
    • Parametrization for terminal settling velocity estimation
    • Input options:
      • ARASTOOPOUR: TODO
      • GANSER: TODO
      • WILSON: TODO
      • DELLINO: TODO
      • PFEIFFER: TODO
      • DIOGUARDI2017: TODO
      • DIOGUARDI2018: TODO
  6. HORIZONTAL_TURBULENCE_MODEL = (options)
    • Type of parametrization used to compute the horizontal diffusion
    • Input options:
      • CONSTANT (float): Constant diffusion coefficient in m^2/s
      • CMAQ: CMAQ option
      • RAMS: RAMS option
  7. VERTICAL_TURBULENCE_MODEL = (options)
    • Type of parametrization used to compute the vertical diffusion
    • Input options:
      • CONSTANT (float): Constant diffusion coefficient in m^2/s
      • SIMILARITY: Equations based on similarity theory
  8. RAMS_CS = (float)
    • Parameter CS required by the horizontal diffusion parametrization
    • Note: Only used if HORIZONTAL_TURBULENCE_MODEL = RAMS
  9. WET_DEPOSITION = (options)
    • Defines whether wet deposition model is enabled
    • Input options:
      • YES: Enable wet deposition
      • NO: Disable wet deposition
  10. DRY_DEPOSITION = (options)
    • Defines whether dry deposition model is enabled
    • Input options:
      • YES: Enable dry deposition
      • NO: Disable dry deposition
  11. GRAVITY_CURRENT = (options)
    • Define whether the gravity current model is enabled
    • Input options:
      • YES: Enable gravity current
      • NO: Disable gravity current
    • Note: Only for TEPHRA species

Sub-block IF_GRAVITY_CURRENT

Used when GRAVITY_CURRENT = YES

  1. C_FLOW_RATE = (float)
    • Empirical constant for volumetric flow rate at the Neutral Buoyancy Level (NBL)
  2. LAMBDA_GRAV = (float)
    • Empirical constant for the gravity current model
  3. K_ENTRAIN = (float)
    • Entrainment coefficient for the gravity current model
  4. BRUNT_VAISALA = (float)
    • Brunt-Väisälä frequency accounting for ambient stratification
  5. GC_START_(HOURS_AFTER_00) = (float)
    • Gravity current starting time
  6. GC_END_(HOURS_AFTER_00) = (float)
    • Gravity current end time