Modules
module	m_derived_variables
	This module features subroutines that allow for the derivation of numerous flow variables from the conservative and primitive ones. Currently, the available derived variables include the unadvected volume fraction, specific heat ratio, liquid stiffness, speed of sound, vorticity and the numerical Schlieren function.

Functions/Subroutines
subroutine, public	m_derived_variables::s_initialize_derived_variables_module
	Computation of parameters, allocation procedures, and/or any other tasks needed to properly setup the module.

subroutine, public	m_derived_variables::s_initialize_derived_variables
	Allocate and open derived variables. Computing FD coefficients.

subroutine, public	m_derived_variables::s_compute_derived_variables (t_step)
	Writes coherent body information, communication files, and probes.

subroutine	m_derived_variables::s_derive_acceleration_component (i, q_prim_vf0, q_prim_vf1, q_prim_vf2, q_prim_vf3, q_sf)
	This subroutine receives as inputs the indicator of the component of the acceleration that should be outputted and the primitive variables. From those inputs, it proceeds to calculate values of the desired acceleration component, which are subsequently stored in derived flow quantity storage variable, q_sf.

subroutine	m_derived_variables::s_derive_center_of_mass (q_vf, c_m)
	This subroutine is used together with the volume fraction model and when called upon, it computes the location of of the center of mass for each fluid from the inputted primitive variables, q_prim_vf. The computed location is then written to a formatted data file by the root process.

subroutine, public	m_derived_variables::s_finalize_derived_variables_module
	Deallocation procedures for the module.

Variables
Finite-difference coefficients
Finite-difference (fd) coefficients in x-, y- and z-coordinate directions. Note that because sufficient boundary information is available for all the active coordinate directions, the centered family of the finite-difference schemes is used.
real(wp), dimension(:, :), allocatable, public	m_derived_variables::fd_coeff_x

real(wp), dimension(:, :), allocatable, public	m_derived_variables::fd_coeff_y

real(wp), dimension(:, :), allocatable, public	m_derived_variables::fd_coeff_z


real(wp), dimension(:, :, :), allocatable, public	m_derived_variables::accel_mag

real(wp), dimension(:, :, :), allocatable, public	m_derived_variables::x_accel

real(wp), dimension(:, :, :), allocatable, public	m_derived_variables::y_accel

real(wp), dimension(:, :, :), allocatable, public	m_derived_variables::z_accel

Detailed Description

Modules