Air Velocity to Pressure Calculator (Dynamic)

Dynamic Pressure Formula:

\[ q = \frac{1}{2} \rho V^2 \]

Dynamic Pressure (q): Pa

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1. What is an Air Velocity to Pressure Calculator?

Definition: This calculator computes the dynamic pressure (q) based on air density (ρ) and velocity (V) using Bernoulli's principle.

Purpose: It helps engineers, HVAC professionals, and aerodynamics specialists determine the pressure generated by moving air.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ q = \frac{1}{2} \rho V^2 \]

Where:

\( q \) — Dynamic pressure (Pascals)
\( \rho \) — Air density (kg/m³)
\( V \) — Air velocity (m/s)

Explanation: The dynamic pressure represents the kinetic energy per unit volume of the air flow.

3. Importance of Dynamic Pressure Calculation

Details: Dynamic pressure is crucial for designing ventilation systems, calculating wind loads, and analyzing aerodynamic performance.

4. Using the Calculator

Tips: Enter air density (default 1.225 kg/m³ for standard conditions) and air velocity in m/s. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is standard air density?
A: At sea level and 15°C, air density is approximately 1.225 kg/m³.

Q2: How does altitude affect the calculation?
A: Air density decreases with altitude - use appropriate density values for your elevation.

Q3: What units are used in this calculator?
A: Metric units are used - kg/m³ for density, m/s for velocity, and Pascals for pressure.

Q4: Can I use this for liquids?
A: Yes, the same formula applies to any fluid - just use the appropriate density.

Q5: What's the difference between dynamic and static pressure?
A: Dynamic pressure relates to fluid motion, while static pressure exists without flow.