Class: Dimensionless

The Dimensionless class is a subclass of Variable designed to represent quantities that do not have physical units. These are often ratios of other quantities, such as Reynolds number, friction factor, or efficiency. The class provides a foundation for performing arithmetic operations on these numbers while maintaining clarity about their unitless nature.

Supported Units

By definition, dimensionless quantities are unitless. No units are supported for this class.

Class Reference

class Dimensionless(value)

A class for handling dimensionless quantities. It ensures that the value is a number and provides standard arithmetic operations.

Parameters:

• value : float or int
  The numeric value of the dimensionless quantity.

Raises:

• TypeError : If value is not a numeric type (int or float).

Examples:

# Create a Dimensionless object for Reynolds number  
>>> Re = Dimensionless(5000)

# Create a Dimensionless object for friction factor  
>>> f = Dimensionless(0.02)

Properties

Property	Type	Description
.value	float	The numeric value of the dimensionless quantity. This is the internal representation.
.original_value	float	The numeric value as provided during initialization.

String Representation

• __str__(self)
  Returns a human-readable string representation of the dimensionless quantity, rounded to six decimal places, followed by (dimensionless).
• __repr__(self)
  Returns a string representation suitable for developers and debugging, such as 5000 (dimensionless).
• __format__(self, format_spec)
  Allows for custom string formatting of the numeric value, such as with f-strings.