Linear Velocity Calculator Cytiva

Linear Velocity Formula:

\[ V = \frac{Q}{A \times 448.83} \]

Linear Velocity (V): ft/s

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1. What is a Linear Velocity Calculator for Cytiva Systems?

Definition: This calculator determines the linear velocity of fluid flow in Cytiva systems based on flow rate and cross-sectional area.

Purpose: It helps engineers and technicians optimize fluid flow parameters in chromatography and filtration systems.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ V = \frac{Q}{A \times 448.83} \]

Where:

\( V \) — Linear velocity (feet per second)
\( Q \) — Flow rate (gallons per minute)
\( A \) — Cross-sectional area (square feet)
448.83 — Conversion factor (GPM to ft³/s)

Explanation: The flow rate is converted to cubic feet per second and divided by the cross-sectional area to determine how fast the fluid is moving through the system.

3. Importance of Linear Velocity Calculation

Details: Proper velocity calculation ensures optimal system performance, prevents channeling, and maintains efficient separation processes.

4. Using the Calculator

Tips: Enter the flow rate in GPM and cross-sectional area in square feet. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is 448.83 used in the formula?
A: This converts gallons per minute (GPM) to cubic feet per second (ft³/s), which is needed for velocity in ft/s.

Q2: What's a typical linear velocity for Cytiva systems?
A: Optimal velocity depends on the application but typically ranges between 0.1-1 ft/s for chromatography systems.

Q3: How do I measure cross-sectional area?
A: For cylindrical columns, use \( A = \pi r^2 \) where r is the radius in feet.

Q4: Does this account for packed bed systems?
A: This calculates superficial velocity. For packed beds, divide by porosity for interstitial velocity.

Q5: Can I use this for other fluid systems?
A: Yes, this formula works for any system where you need to convert volumetric flow to linear velocity.