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## Main Question or Discussion Point

I have a problem with Discharge Coefficient of Valve equation which is described in book 'advanced water distribution modeling and management'

let me say:

I think the expression V^2 in Discharge Equation (P. 618 of the book mentioned) is extra and the equation must be changed to:

I) Cv=V/[(2gh)^.5]

because other equation for Cv is:

II) Q=Cv (2gh)^0.5 3.14D^2/4

and these two equations are equal.

Additionally the equation P. 402 (equation 9.3) confirms my thought.

What is your idea?

thanx

let me say:

I think the expression V^2 in Discharge Equation (P. 618 of the book mentioned) is extra and the equation must be changed to:

I) Cv=V/[(2gh)^.5]

because other equation for Cv is:

II) Q=Cv (2gh)^0.5 3.14D^2/4

and these two equations are equal.

Additionally the equation P. 402 (equation 9.3) confirms my thought.

What is your idea?

thanx