Velocity While Running Full Given Proportionate Discharge Calculator

Formula Used:

\[ V = \frac{Vs \times a}{Pq \times A} \]

Velocity in a Partially Running Sewer (Vs):

m/s

Area of Partially Full Sewers (a):

m²

Proportionate Discharge (Pq):

Area of Running Full Sewers (A):

m²

Velocity While Running Full (V):

m/s

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1. What is Velocity While Running Full?

Velocity while Running Full refers to the speed of fluid flow in a pipe when it's completely filled, influenced by pipe slope and roughness. It's a crucial parameter in hydraulic engineering for designing efficient sewer systems.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ V = \frac{Vs \times a}{Pq \times A} \]

Where:

\( V \) — Velocity while Running Full (m/s)
\( Vs \) — Velocity in a Partially Running Sewer (m/s)
\( a \) — Area of Partially Full Sewers (m²)
\( Pq \) — Proportionate Discharge
\( A \) — Area of Running Full Sewers (m²)

Explanation: This formula calculates the velocity when a sewer pipe is completely filled based on measurements taken when the pipe is partially filled.

3. Importance of Velocity Calculation

Details: Accurate velocity calculation is essential for proper sewer system design, ensuring adequate flow capacity, preventing sedimentation, and maintaining self-cleansing velocities in sewer pipes.

4. Using the Calculator

Tips: Enter all required values in appropriate units. Ensure all values are positive and valid for accurate calculations. The calculator provides results in meters per second (m/s).

5. Frequently Asked Questions (FAQ)

Q1: Why is velocity important in sewer design?
A: Proper velocity prevents sediment deposition, ensures self-cleaning action, and maintains efficient wastewater transport in sewer systems.

Q2: What is the typical velocity range for sewer pipes?
A: Typically 0.6-3.0 m/s to prevent sedimentation (minimum) and avoid pipe erosion (maximum).

Q3: How does pipe slope affect velocity?
A: Steeper slopes generally increase flow velocity due to greater gravitational force acting on the fluid.

Q4: What is Proportionate Discharge?
A: It's the ratio of discharge while running partially full to running full, representing the relative flow capacity at different fill levels.

Q5: When should this calculation be used?
A: This calculation is particularly useful when designing new sewer systems or analyzing existing ones where partial flow conditions need to be translated to full flow capacity.