rmt_create_adv: Create an 'RMT3DMS' adv object
In rogiersbart/RMT3DMS: Pre- and post-processing of MT3DMS & MT3D-USGS files

Description Usage Arguments Details Value See Also Examples

rmt_create_adv creates an RMT3DMS adv object.

rmt_create_adv(
  mixelm = -1,
  percel = 1,
  mxpart = 1e+06,
  nadvfd = 0,
  itrack = 1,
  wd = 0.5,
  dceps = 1e-05,
  nplane = 0,
  npl = 0,
  nph = 32,
  npmin = 2,
  npmax = 2 * nph,
  interp = 1,
  nlsink = nplane,
  npsink = nph,
  dchmoc = 0.001
)

`mixelm`	integer code for the advection solution option (see details). Defaults to -1.
`percel`	Courant number. Defaults to 1
`mxpart`	maximum number of moving particles. Only used when mixelm = 1 or 3. Defaults to 1e6
`nadvfd`	weighting scheme for implicit finite difference (mixelm = 0). 0 or 1 (default) indicates upstream weighting, 2 is central-in-space
`itrack`	particle-tracking method: 1 (default) = first-order Euler, 2 = fourth-order Runge-Kutta, 3 = hybrid. Only used when mixelm = 1, 2 or 3.
`wd`	concentration weighting factor used for operator splitting in particle tracking-based methods. Defaults to 0.5. Only used when mixelm = 1, 2 or 3.
`dceps`	Relative Cell Concentration Gradient below which advective transport is negligble. Defaults to 1e-5. Only used when mixelm = 1 or 3.
`nplane`	specifies type of initial placement of particles: random (0; default) or fixed pattern (> 0). Only used when mixelm = 1 or 3.
`npl`	number of initial particles per cell at cells where Relative Cell Concentration Gradient is <= dceps. Defaults to 0. Only used when mixelm = 1 or 3.
`nph`	number of initial particles per cell at cells where Relative Cell Concentration Gradient is > dceps. Defaults to 32. Only used when mixelm = 1 or 3.
`npmin`	minimum number of particles allowed per cell. Defaults to 2. Only used when mixelm = 1 or 3.
`npmax`	maximum number of particles allowed per cell. Defaults to `2 * nph`. Only used when mixelm = 1 or 3.
`interp`	concentration interpolation method for MMOC scheme. Only a value of 1 is allowed (linear interpolation). Only used when mixelm = 2 or 3.
`nlsink`	specifies type of initial placement of particles to approximate sink cells in MMOC: random (0) or fixed pattern (> 0). Defaults to `nplane`. Only used when mixelm = 2 or 3.
`npsink`	number of particles used to approximate sink cells in MMOC. Defaults to `nph`. Only used when mixelm = 2 or 3.
`dchmoc`	critical Relative Concentration Gradient for controlling selective use of MOC or MMOC in HMOC scheme. Defaults to 0.001. Only used when mixelm = 3.

mixelm = 0: standard finite-difference method with upstream (nadvfd = 0 or 1) or central-in-space (nadvfd = 2) weighting. mixelm = 1: forward-tracking method of characteristics (MOC) mixelm = 2: backward-tracking modified method of characteristics (MMOC) mixelm = 3: hybrid method of characteristics (HMOC) with MOC or MMOC automatically and dynamically selected mixelm = -1: third-order TVD scheme (ULTIMATE)

an object of class adv

rmt_read_adv, rmt_write_adv