Nullify the pointer link
subroutine unlink_aliases()
!< Nullify the pointer link
implicit none
DebugCall("unlink_aliases")
nullify(density)
nullify(x_speed)
nullify(y_speed)
nullify(z_speed)
nullify(pressure)
nullify(density_inf)
nullify(x_speed_inf)
nullify(y_speed_inf)
nullify(z_speed_inf)
nullify(pressure_inf)
select case (trim(turbulence))
case ("none")
continue
case ("sst", "sst2003", "bsl", "kw", "des-sst")
nullify(tk)
nullify(tw)
nullify(tk_inf)
nullify(tw_inf)
case ("kkl")
nullify(tk)
nullify(tkl)
nullify(tk_inf)
nullify(tkl_inf)
case ("sa", "saBC")
nullify(tv)
nullify(tv_inf)
case ("ke")
nullify(tk)
nullify(te)
nullify(tk_inf)
nullify(te_inf)
case ("les")
continue
! todo
case DEFAULT
Fatal_error
end select
!Transition modeling
select case(trim(transition))
case('lctm2015')
nullify(tgm)
nullify(tgm_inf)
case('bc', 'none')
!do nothing
continue
case DEFAULT
Fatal_error
end Select
end subroutine unlink_aliases