Pump Affinity Laws Calculator

Apply affinity laws for speed changes: Q_2/Q_1 = N_2/N_1, H_2/H_1 = (N_2/N_1)², P_2/P_1 = (N_2/N_1)³. Halving pump speed reduces power by 8× — major VFD energy savings.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)
σy — Normal Stress Y (MPa)
τxy — Shear Stress (MPa)
⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.
Advertisement

How to Use

Enter the values for the patient or scenario you are assessing. Apply affinity laws for speed changes: Q_2/Q_1 = N_2/N_1, H_2/H_1 = (N_2/N_1)², P_2/P_1 = (N_2/N_1)³. Halving pump speed reduces power by 8× — major VFD energy savings. Use the pump affinity laws result to inform your clinical assessment.

Related Calculators

Pump Power

Engineering

Reynolds Number

Engineering

Bernoulli

Engineering

Frequently Asked Questions