The Aspect Ratio is a dimensionless parameter commonly used in fluid mechanics to describe the geometric shape of an object or a flow domain, particularly in the context of channels, ducts, or pipes. It quantifies the ratio of the width of the flow channel to its height or diameter. The Aspect Ratio is defined as the ratio of the characteristic width of a flow channel to its characteristic height or diameter. The Aspect Ratio is dimensionless. The formula for the Aspect Ratio () is given by:
Where:
- is the Aspect Ratio,
- Width is a characteristic width of the flow channel,
- Height (or Diameter) is a characteristic height or diameter of the flow channel.