elements.catalog.segments_for_frequency

elements.catalog.segments_for_frequency(
    length,
    sound_speed,
    f_max,
    points_per_wavelength=12,
)

Smallest segment count N that keeps each segment acoustically compact at f_max.

A discretization composite resolves waves only where each segment is short against the wavelength (k dL << 1). With P points per wavelength, N >= P * f_max * L / c. Use it to auto-size :func:fanno_pipe / :func:tapered_duct from the highest analysis frequency rather than guessing.

Parameters

Name	Type	Description	Default
length	float	Element length L [m].	required
sound_speed	float	A representative mean sound speed c [m/s] (e.g. solution.field("c").mean()).	required
f_max	float	Highest analysis frequency [Hz] the chain must resolve.	required
points_per_wavelength	int	Target points per wavelength P (default 12; 10-20 is typical).	12

Returns

Name	Type	Description
	int	The recommended segment count N (>= 1).