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Calculate Required Pipe Diameter using Darcy-Weisbach

Source: R/calc_diameter_darcy.R
calc_diameter_darcy.Rd

Calculates the required internal pipe diameter iteratively given a specific head loss and flow rate. By taking a functional approach, it supports any friction factor calculation function.

Usage

calc_diameter_darcy(
  loss,
  length,
  flow,
  roughness,
  friction_fun = NULL,
  viscosity = 1.004e-06,
  gravity = 9.81
)

Arguments

loss

Numeric. The target friction head loss (meters).

length

Numeric. The length of the pipe (meters).

flow

Numeric. The volumetric flow rate (cubic meters per second).

roughness

Numeric. The absolute internal roughness of the pipe (meters). Required unless friction_factor is provided.

friction_fun

Function. A function to calculate the friction factor (must accept reynolds, roughness, and diameter). If NULL (the default), it uses calc_friction_cw.

viscosity

Numeric. Kinematic viscosity of the fluid (sq. meters per sec). Default is 1.004e-6.

gravity

Numeric. Acceleration due to gravity (meters per second squared). Default is 9.81.

Value

A numeric vector representing the required internal diameter in meters.

Examples

# Find diameter using the default Colebrook-White function
calc_diameter_darcy(loss = 5, length = 100, flow = 0.02, roughness = 0.00026)
#> [1] 0.1107086

# Find diameter by injecting Swamee-Jain
calc_diameter_darcy(
  loss = 5, length = 100, flow = 0.02, roughness = 0.00026,
  friction_fun = calc_friction_sj
)
#> [1] 0.1108447