Function drag_force 

pub fn drag_force(
    density: f64,
    velocity: f64,
    drag_coefficient: f64,
    area: f64,
) -> Option<f64>

Computes drag force from density, velocity, drag coefficient, and area.

Formula: F_d = 0.5 * ρ * v² * C_d * A

Returns None when density, drag_coefficient, or area is negative, when any input is not finite, or when the computed result is not finite.

Examples

use use_fluid::drag_force;

let force = drag_force(1.225, 10.0, 0.47, 1.0).unwrap();

assert!((force - 28.7875).abs() < 1.0e-9);