fluids motions and forces -- the analytic way

fluid motions and forces -- the experimental way

THE RELATIONSHIP BETWEEN MOTION AND FORCES

Determined by Newtonian Mechanics: For any given system, the integration of external forces over time equals to the systemic increase of momentum. A system that does not sustain external forces experiences a conservation of momentum. Applying mechanicsl theory is generally too cumbersome for the practicality of chemical engineering practice, and thus in parallel to the analytic approach, one uses the experimental way.