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Modelling emitters to represent leakages

Dear Bentley,

I have assigned emitter coefficients to the nodes in my model to represent the leakages of the system. Emitter coefficient was calculated using the equation Q=k*P^n

However model results show a negative demand in some nodes where there are negative pressures. The reason I supposed is that the emitters create an inflow when the pressure is negative, which does not happen practically.

Is there a method to limit the minimum emitter discharge to 0, without giving negative discharges when nodal pressure goes negative?

Thank you,

Harsha