FLUE_constants

Module FLUE_constants Numerical constants and precision definitions for the FLUE codebase.

Purpose: This module provides a centralised and portable definition of working precisions and commonly used mathematical constants using ISO_C_BINDING.

Design:

• WP defines the working real precision (double precision).
• WC defines the corresponding complex precision.
• SP provides single precision support where needed.

Mathematical constants:

• PI is defined via acos(-1) for portability.
• TWO_PI is provided to avoid repeated computation and magic numbers.

Example:

 use FLUE_constants, only: WP, PI
 real(kind=WP) :: theta
 theta = 2.0_WP * PI

Source: src/constants.f90

Dependencies

Variables

Name	Type	Attributes	Description
WP	integer	parameter	Working precision for real-valued computations [double precision]
WC	integer	parameter	Working precision for complex-valued computations [double precision complex].
PI	real(kind=WP)	parameter	Circular constant π ~ 3.14.....
TWO_PI	real(kind=WP)	parameter	2π.
SP	integer	parameter	Single precision kind