Time step options and variables

Collaboration diagram for Time step options and variables:

Variables
integer(c_int), pointer, save	ntpabs
	Absolute time step number for previous calculation. More...
integer(c_int), pointer, save	ntcabs
	Current absolute time step number. In case of restart, this is equal to ntpabs + number of new iterations. More...
integer(c_int), pointer, save	ntmabs
	Maximum absolute time step number. More...
integer(c_int), pointer, save	ntinit
	Number of time steps for initalization. More...
real(c_double), pointer, save	ttpabs
	Absolute time value for previous calculation. More...
real(c_double), pointer, save	ttcabs
	Current absolute time. In case of restart, this is equal to ttpabs + additional computed time. More...
real(c_double), pointer, save	ttmabs
	Maximum absolute time. More...
integer(c_int), pointer, save	inpdt0
	indicator "zero time step" More...
integer(c_int), pointer, save	iptlro
	Clip the time step with respect to the buoyant effects. More...
integer(c_int), pointer, save	idtvar
	option for a variable time step More...
real(c_double), pointer, save	dtref
	reference time step More...
real(c_double), pointer, save	coumax
	maximum Courant number (when idtvar is different from 0) More...
real(c_double), pointer, save	cflmmx
	maximum Courant number for the continuity equation in compressible model More...
real(c_double), pointer, save	foumax
	maximum Fourier number (when idtvar is different from 0) More...
real(c_double), pointer, save	varrdt
	relative allowed variation of dt (when idtvar is different from 0) More...
real(c_double), pointer, save	dtmin
	minimum value of dt (when idtvar is different from 0). Take dtmin = min (ld/ud, sqrt(lt/(gdelta rho/rho)), ...) More...
real(c_double), pointer, save	dtmax
	maximum value of dt (when idtvar is different from 0). Take dtmax = max (ld/ud, sqrt(lt/(gdelta rho/rho)), ...) More...
double precision, dimension(nvarmx), save	cdtvar
	multiplicator coefficient for the time step of each variable More...
double precision, dimension(nvarmx), save	relaxv
	relaxation of variables (1 stands fo no relaxation) More...
real(c_double), pointer, save	relxst
	relaxation coefficient for the steady algorithm More...

Detailed Description

Variable Documentation

double precision, dimension(nvarmx), save cdtvar

multiplicator coefficient for the time step of each variable

• useless for u,v,w,p
• for k,e the same value is taken (value of k)
• for Rij, e the same value is taken (value of r11)

real(c_double), pointer, save cflmmx

maximum Courant number for the continuity equation in compressible model

real(c_double), pointer, save coumax

maximum Courant number (when idtvar is different from 0)

real(c_double), pointer, save dtmax

maximum value of dt (when idtvar is different from 0). Take dtmax = max (ld/ud, sqrt(lt/(gdelta rho/rho)), ...)

real(c_double), pointer, save dtmin

minimum value of dt (when idtvar is different from 0). Take dtmin = min (ld/ud, sqrt(lt/(gdelta rho/rho)), ...)

real(c_double), pointer, save dtref

reference time step

real(c_double), pointer, save foumax

maximum Fourier number (when idtvar is different from 0)

integer(c_int), pointer, save idtvar

option for a variable time step

• -1: steady algorithm
• 0: constant time step
• 1: time step constant in space but variable in time
• 2: variable time step in space and in time

integer(c_int), pointer, save inpdt0

indicator "zero time step"

• 0: standard calculation
• 1: to simulate no time step
  • for non-restarted computations: only resolution (Navier-Stokes, turbulence, scalars) is skipped
  • for restarted computations: resolution, computation of physical properties, and definition of boundary conditions is skipped (values are read from checkpoint file)

integer(c_int), pointer, save iptlro

Clip the time step with respect to the buoyant effects.

• 0: false
• 1: true

integer(c_int), pointer, save ntcabs

Current absolute time step number. In case of restart, this is equal to ntpabs + number of new iterations.

integer(c_int), pointer, save ntinit

Number of time steps for initalization.

integer(c_int), pointer, save ntmabs

Maximum absolute time step number.

integer(c_int), pointer, save ntpabs

Absolute time step number for previous calculation.

double precision, dimension(nvarmx), save relaxv

relaxation of variables (1 stands fo no relaxation)

real(c_double), pointer, save relxst

relaxation coefficient for the steady algorithm

real(c_double), pointer, save ttcabs

Current absolute time. In case of restart, this is equal to ttpabs + additional computed time.

real(c_double), pointer, save ttmabs

Maximum absolute time.

real(c_double), pointer, save ttpabs

Absolute time value for previous calculation.

real(c_double), pointer, save varrdt

relative allowed variation of dt (when idtvar is different from 0)