https://github.com/cran/ReacTran
Tip revision: 6a2a464424c6eaca2ee6747a2ff1fc6e15105936 authored by Karline Soetaert on 24 December 2014, 00:00:00 UTC
version 1.4.2
version 1.4.2
Tip revision: 6a2a464
fiadeiro.R
##==============================================================================
## The Fiadeiro and Veronis scheme: advective finite difference weights (AFDW)
##==============================================================================
fiadeiro <- function(v, D, dx.aux=NULL, grid=list(dx.aux=dx.aux)) {
Pe <- abs(v)*grid$dx.aux/D
sigma <- (1+(1/tanh(Pe)-1/Pe))/2
return(sigma)
}