👉 Blasius's law, also known as the "Blasius equation," is a mathematical model that describes the behavior of water in a porous medium. It was developed by Karl Blasius and has been used to calculate flow rates through porous media such as soil and groundwater. The formula for Blasius's law is: \[ \text{Flow rate} = \frac{\text{Total mass of water}}{\text{Volume of the porous medium}} \] This equation states that