public function df_critical(model, X, ns, S, z0, zi, u)

df_critical

Description

Calculates the Jacobian of the critical point function F_critical.

Arguments

Type	Intent	Optional	Attributes		Name
class(ArModel),	intent(in)			::	model	Equation of state model
real(kind=pr),	intent(in)			::	X(4)	Vector of variables
integer,	intent(in)			::	ns	Position of the specification variable
real(kind=pr),	intent(in)			::	S	Specification variable value
real(kind=pr),	intent(in)			::	z0(:)	Molar fractions of the first fluid
real(kind=pr),	intent(in)			::	zi(:)	Molar fractions of the second fluid
real(kind=pr),	intent(in)			::	u(:)	Eigen-vector

Return Value real(kind=pr), (4,4)

Jacobian of the critical point function

Variables

Type	Visibility	Attributes		Name		Initial
real(kind=pr),	public		::	F1(4)
real(kind=pr),	public		::	F2(4)
real(kind=pr),	public		::	dx(4)
real(kind=pr),	public		::	eps
integer,	public		::	i