Quick Answer
The calculate friction factor using simplified swamee-jain equation computes f_darcy from the input values you provide.
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Explore ToolFusionResult Interpretation
Calculate friction factor using simplified Swamee-Jain equation computes f_darcy in 1 using the defined engineering formula and the input values provided. No universal acceptance threshold is defined by this calculator.
Worked Example
default_test
Given:
- d_pipe = 100
- re_num = 100000
- roughness = 0.045
Expected Result:
- f_darcy = 0.003809145797451
Engineering Interpretation:
Under the given input conditions, the calculated result is: f_darcy = 0.003809145797451.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from deterministically validated test cases.
Formula / Method
f_darcy = 0.25 / pow(log(roughness / (3.7 * d_pipe) + 5.74 / pow(re_num, 0.9)), 2)f_darcy.
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| roughness | roughness | INPUT | roughness |
| d_pipe | d_pipe | INPUT | d_pipe |
| re_num | re_num | INPUT | re_num |
| f_darcy | f_darcy | OUTPUT | f_darcy |
Calculation Steps
- Enter the roughness in mm.
- Enter the d_pipe in mm.
- Enter the re_num in 1.
- Read the f_darcy (1) from the results.
Frequently Asked Questions
What does this calculator calculate?
The Calculate friction factor using simplified Swamee-Jain equation estimates f_darcy based on the input parameters you provide
Why is roughness important in this calculation?
roughness is used directly in the calculation of f_darcy. Its effect on the result depends on the complete formula and the values of the other inputs.. When you enter roughness in mm, the calculator uses it in the engineering formula to compute the output
How should I interpret the result f_darcy?
The calculator outputs f_darcy. 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: roughness (mm), d_pipe (mm). 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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