1. What is Flow Rate From Pressure?

The flow rate from pressure equation calculates the volumetric flow rate of a fluid through an orifice or pipe based on the pressure difference across the opening. This fundamental equation is widely used in fluid dynamics and engineering applications.

2. How Does the Calculator Work?

The calculator uses the flow rate equation:

Where:

• \( Q \) — Volumetric flow rate (m³/s)
• \( A \) — Cross-sectional area (m²)
• \( \Delta P \) — Pressure difference (Pa)
• \( \rho \) — Fluid density (kg/m³)

Explanation: This equation derives from Bernoulli's principle and conservation of energy, assuming ideal fluid flow through an orifice.

3. Importance of Flow Rate Calculation

Details: Accurate flow rate calculation is essential for designing piping systems, sizing pumps, calculating fluid transport capacity, and optimizing industrial processes involving fluid flow.

4. Using the Calculator

Tips: Enter cross-sectional area in square meters, pressure difference in Pascals, and fluid density in kg/m³. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What assumptions does this equation make?
A: It assumes ideal fluid flow, incompressible fluid, negligible viscosity effects, and no energy losses due to friction.

Q2: Can this be used for gases?
A: For gases at low pressure differences, it can provide approximate results, but for compressible fluids, more complex equations are needed.

Q3: What are typical values for fluid density?
A: Water: 1000 kg/m³, Air: 1.225 kg/m³, Gasoline: 680-800 kg/m³, Mercury: 13500 kg/m³.

Q4: How accurate is this calculation in real applications?
A: For preliminary calculations and ideal conditions, it's reasonably accurate. Real-world applications require correction factors for friction and turbulence.

Q5: What units should I use for pressure?
A: Pascals (Pa) are required. Remember: 1 bar = 100,000 Pa, 1 atm = 101,325 Pa, 1 psi = 6894.76 Pa.