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AFiD/InitTimeMarchScheme.F90

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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! !
! FILE: InitTimeMarchScheme.F90 !
! CONTAINS: subroutine InitTimeMarchScheme !
! !
! PURPOSE: Initialize the time-marching constants for !
! the integrator !
! !
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
subroutine InitTimeMarchScheme
use param
implicit none
integer ns
if(nsst.gt.1) then
gam(1)=8.d0/15.d0
gam(2)=5.d0/12.d0
gam(3)=3.d0/4.d0
rom(1)=0.d0
rom(2)=-17.d0/60.d0
rom(3)=-5.d0/12.d0
!m======================================================
if(ismaster) then
write(6,100) (gam(ns),ns=1,nsst),(rom(ns),ns=1,nsst)
100 format(/,5x,'The time scheme is a III order Runge-Kutta' &
,4x,'gam= ',3f8.3,4x,'ro= ',3f8.3)
endif
!m======================================================
else
gam(1)=1.5d0
gam(2)=0.d0
gam(3)=0.d0
rom(1)=-0.5d0
rom(2)=0.d0
rom(3)=0.d0
!m======================================================
if(ismaster) then
write(6,110) gam(1),rom(1)
110 format(/,5x,'The time scheme is the Adams-Bashfort',4x, &
'gam= ',f8.3,4x,'ro= ',f8.3)
endif
!m======================================================
endif
do ns=1,nsst
alm(ns)=(gam(ns)+rom(ns))
end do
return
end