Stormwater Engineering

Storm Sewer Pipe Minimum Self-Cleansing Velocity Validator (Shields-Based) Calculator

Storm Sewer Pipe Minimum Self-Cleansing Velocity Validator (Shields-Based) engineering calculator.

Quick Answer

Calculate Storm Sewer Pipe Minimum Self-Cleansing Velocity Validator (Shields-Based)

Calculator

Minimum self-cleansing velocity (m⁄s)
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Result Interpretation

Storm Sewer Pipe Minimum Self-Cleansing Velocity Validator (Shields-Based) Calculator computes Minimum self-cleansing velocity in m/s using the defined engineering formula and the input values provided.

Worked Example

Verified calculation

Given:

  • Gravitational acceleration = 9.81
  • Specific gravity of sediment = 2.65
  • Darcy-Weisbach friction factor = 0.018
  • Median sediment particle diameter = 0.0005

Expected Result:

  • Minimum self-cleansing velocity = 1.0700283457008

Engineering Interpretation:

Under the given input conditions, the calculated result is: Minimum self-cleansing velocity = 1.0700283457008 m/s.

The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.

Formula / Method

minimum self-cleansing velocity = sqrt( (8.0 * gravitational acceleration * (specific gravity of sediment - 1.0) * median sediment particle diameter) / (darcy-weisbach friction factor * 3.14159265358979) )

Formula family: formula_stormwater_storm_sewer_pipe_minimum_self_cleansing_velocity_validator

Variables

SymbolLabelRoleDescription
g Gravitational acceleration INPUT Gravitational acceleration
S_s Specific gravity of sediment INPUT Specific gravity of sediment
d_50 Median sediment particle diameter INPUT Median sediment particle diameter
f_d Darcy-Weisbach friction factor INPUT Darcy-Weisbach friction factor
result Minimum self-cleansing velocity OUTPUT Minimum self-cleansing velocity

Calculation Steps

  1. Enter the gravitational acceleration in m/s^2.
  2. Enter the specific gravity of sediment in dimensionless.
  3. Enter the median sediment particle diameter in m.
  4. Enter the darcy-weisbach friction factor in dimensionless.
  5. Step 1: Compute minimum self-cleansing velocity.
  6. Read the minimum self-cleansing velocity (m/s) from the results.

Engineering Summary

Calculate Storm Sewer Pipe Minimum Self-Cleansing Velocity Validator (Shields-Based)

Frequently Asked Questions

What does this calculator calculate?

The Storm Sewer Pipe Minimum Self-Cleansing Velocity Validator (Shields-Based) Calculator estimates Minimum self-cleansing velocity based on the input parameters you provide

Why is gravitational acceleration important in this calculation?

gravitational acceleration is directly proportional to minimum self-cleansing velocity. When you enter gravitational acceleration in m/s^2, the calculator uses it in the engineering formula to compute the output

How should I interpret the result minimum self-cleansing velocity?

The calculator outputs minimum self-cleansing velocity in m/s. To convert to km/h, multiply the result by 3.6. The result is computed directly from the input values using the defined engineering formula

What units should I use for the inputs?

Enter each value in the units shown next to the input field: Gravitational acceleration (m/s^2), Specific gravity of sediment (dimensionless), Median sediment particle diameter (m), Darcy-Weisbach friction factor (dimensionless). Make sure all inputs use the specified units for consistent results

What assumptions does this calculator use?

This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment

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