Also, keep in mind that this video uses the Darcy friction factor (64/Re = f for laminar flow) as opposed to the Fanning friction factor (16/Re = f for laminar flow). Therefore, (7:32) h_L = f(L/D)*v^2/(2*g) is correct for Darcy friction factors, but h_L = 2f(L/D)*v^2/g for fanning friction factors. The friction factors are essentially different by a factor of 4 (therefore f_f * 4 = f_d).
How do I use Bernoulli Equation to calculate following question?Pump supplies water to a nozzle of 25mm diameter through a pipe 180m long and 75mm diameter. The nozzle is at a level 9m above pump. Taking discharge coefficient of nozzle as 0.94 and coefficient of friction of pipe as 0.012, calculate pressure required at pump outlet to give a discharge of 8dm^3/s. Answer given is 426KN/m^2. So far going from your example, I can see that Z2 - Z1 = 9m, hL = 4fLV^2 / D2g, but I am not sure what P1, P2 and V1, V2 are for this question. May someone please give me a hint for this, this would be much appreciated just to get me on the correct path for this question?
App para Android. Calculo de diámetros en tuberías a presión. Aplicación disponible en Google Play >> play.google.com/store/apps/details?id=appinventor.ai_ic_edgarladinom.Tuberias_Presion_DW
![BOWKYLION - วิงวอน (ex-change) [Official MV]](http://i.ytimg.com/vi/cLdnZWDaO-w/mqdefault.jpg)
(4:46) The exact numbers are debated, but generally Re
Also, keep in mind that this video uses the Darcy friction factor (64/Re = f for laminar flow) as opposed to the Fanning friction factor (16/Re = f for laminar flow). Therefore, (7:32) h_L = f(L/D)*v^2/(2*g) is correct for Darcy friction factors, but h_L = 2f(L/D)*v^2/g for fanning friction factors. The friction factors are essentially different by a factor of 4 (therefore f_f * 4 = f_d).
Nice vid man. now I use volumetric flow rate instead of flow rate thanks a lot.
How do I use Bernoulli Equation to calculate following question?Pump supplies water to a nozzle of 25mm diameter through a pipe 180m long and 75mm diameter. The nozzle is at a level 9m above pump. Taking discharge coefficient of nozzle as 0.94 and coefficient of friction of pipe as 0.012, calculate pressure required at pump outlet to give a discharge of 8dm^3/s. Answer given is 426KN/m^2. So far going from your example, I can see that Z2 - Z1 = 9m, hL = 4fLV^2 / D2g, but I am not sure what P1, P2 and V1, V2 are for this question. May someone please give me a hint for this, this would be much appreciated just to get me on the correct path for this question?
If the volumetric flow rate is not known so ,is there. A way to solve this problem or to find the flow rate
Very helpful. Thanks!
Hah aha. . . Great great. Thanks for reminding me these stuff again Mr. Well I respect you. You're too detailed.
Y didn't u consider atmospheric pressure 101 kpa?
it is considered as zero in gauge pressure
Hi Hello Sir Good Afternoon sir
App para Android. Calculo de diámetros en tuberías a presión. Aplicación disponible en Google Play >>
play.google.com/store/apps/details?id=appinventor.ai_ic_edgarladinom.Tuberias_Presion_DW