difad2_mod.f

33 lines · 1 definitions · on GitHub (7be4133)

Python version: difad2_mod.py, 20 lines, on the right (switch to Python above the code).

Variables on this page (5)

json, vesa, vesa0, vesd, vesd0

Purpose

DIFAD2_MOD holds the advective and diffusive parts of the meridional circulation velocity at each shell, for the diffusion-plus-advection treatment of angular momentum (LDIFAD), shared by 3 routines. It replaces COMMON/DIFAD2/ (MHP via Claude, 10/14/26); JSON comes from DIMENSIONS_MOD.

What its variables hold, who sets them, who reads them.

VESA(JSON), VESD(JSON): the advective (signed) and diffusive parts, set by VCIRC (and rescaled there by the μ-gradient factor); read by ROTGRID, which interpolates them into ECOD3, ECOD4 (DIFAD_MOD), and printed by CHECKJ.
VESA0(JSON), VESD0(JSON): their values from the previous call, saved and read by VCIRC alone.

Design

A blanket USE DIFAD2_MOD.

Definitions

moduleDIFAD2_MOD

lines 19–33 · GitHub

Uses modules DIMENSIONS_MOD

Used by (3 units)

CHECKJ, ROTGRID, VCIRC

Change log

The changes since rp_1

Changed since rp_1. New file: COMMON/DIFAD2/ as a module.

1C 2C 3C$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ 4C DIFAD2_MOD 5C$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ 6C 10/14/26 MHP via Claude 7C code changed to convert COMMON/DIFAD2/ into this module. 8C 9C Imported with a blanket USE, the convention for the conversion. 10C All 3 files declared this block identically, so the USE 11C imports exactly the names the declaration already made global in 12C each scoping unit and cannot change meaning. 13C 14C The types restate what the implicit rules supplied: L is 15C LOGICAL*4, I/J/K/M/N are INTEGER*4, everything else REAL*8. 16C SAVE is explicit rather than relying on module variables being 17C implicitly saved, which holds only from Fortran 2008 while ifort 18C Classic predates it. That matches COMMON's semantics. 19 MODULE DIFAD2_MOD 20C 10/20/26 MHP via Claude 21C code changed to take JSON from DIMENSIONS_MOD instead of declaring 22C a PRIVATE copy here. 23 USE DIMENSIONS_MOD 24 25 IMPLICIT NONE 26 SAVE 27 28 REAL*8 :: VESA(JSON) 29 REAL*8 :: VESA0(JSON) 30 REAL*8 :: VESD(JSON) 31 REAL*8 :: VESD0(JSON) 32 33 END MODULE DIFAD2_MOD

1"""Python version of difad2_mod.f (YREC 7be4133): the advective and 2diffusive parts of the circulation velocity, formerly COMMON/DIFAD2/. 3 4Translates: difad2_mod.f#DIFAD2_MOD (7be4133) 5 6Routines that USE DIFAD2_MOD import this module and write 7``difad2_mod.<name>``. 8""" 9 10import numpy as np 11 12from pyrec import dimensions_mod 13 14_JSON = dimensions_mod.json 15 16# Fortran lines 28–31. 17vesa = np.zeros(_JSON + 1) # advective part (vcirc) 18vesa0 = np.zeros(_JSON + 1) # its previous value (vcirc) 19vesd = np.zeros(_JSON + 1) # diffusive part (vcirc) 20vesd0 = np.zeros(_JSON + 1) # its previous value (vcirc)