The word "implicit" stands for a term that appears on the both sides of the equation. For example in Colebrook-White equation which is used to calculate the friction factor 'f'

in turbulent flow through pipes, the term 'f' appears on both LHS and RHS of the equation as shown below.

The word "implicit" stands for a term that appears on the both sides of the equation. For example in Colebrook-White equation which is used to calculate the friction factor 'f'

in turbulent flow through pipes, the term 'f' appears on both LHS and RHS of the equation as shown below.