online_headloss_venturi_meter:  Head loss using a Venturi meter A Venturi meter Online discharge using Venturi meter ν = f(T) ReD2 = 4Q/(πD2ν) K = f(ReD2, D2/D1) A2 = (π/4) D22 hf = [Q/(KA2)]2/(2g) h = hf/[(ρ2/ρ1) - 1] [SI units: Q in m3/s; D in m; T in °C; h in m] [U.S. units: Q in cfs; D in ft; T in °F; h in ft] INPUT DATA: Select:   SI units (metric) U.S. Customary units Discharge Q :     /var/www/html/ponce/onlineheadlossventurimeter.php on line 622 ">     Warning: Undefined variable $dischargeunits in /var/www/html/ponce/onlineheadlossventurimeter.php on line 623 Diameter D1 :         Warning: Undefined variable $diameter1units in /var/www/html/ponce/onlineheadlossventurimeter.php on line 629 Diameter D2 :         Warning: Undefined variable $diameter0units in /var/www/html/ponce/onlineheadlossventurimeter.php on line 635 Temperature T :         Warning: Undefined variable $temperatureunits in /var/www/html/ponce/onlineheadlossventurimeter.php on line 642 Ratio ρ2 /ρ1 :     /var/www/html/ponce/onlineheadlossventurimeter.php on line 648 ">     [Leave blank to set mercury manometer as default ρ2 /ρ1 = 13.6] OUTPUT: hρ2 =  Warning: Undefined variable $headloss in /var/www/html/ponce/onlineheadlossventurimeter.php on line 664 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlineheadlossventurimeter.php on line 664 0   Warning: Undefined variable $headlossunits in /var/www/html/ponce/onlineheadlossventurimeter.php on line 664 hρ1 =  Warning: Undefined variable $headf in /var/www/html/ponce/onlineheadlossventurimeter.php on line 666 Deprecated: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in /var/www/html/ponce/onlineheadlossventurimeter.php on line 666 0   Warning: Undefined variable $headlossunits in /var/www/html/ponce/onlineheadlossventurimeter.php on line 666 • Venturi effect on Wikipedia   Your request was processed at  10:56:15 pm on April 3rd, 2025   [ 250403  22:56:15 ]. Thank you for running online_discharge_venturi_meter.   [160721]