## RaphaelFilgueiras 2 years ago when we have a laminar flow in a circular tube the friction factor is 16/Re or 64/Re?

1. Natan

64/Re

2. RaphaelFilgueiras

@natan what is formula for the difference of pressure in a laminar flow in this tube?

3. Natan

bernoulli equation + losses

4. Natan

Depending on the system configuration you make the adjustments

5. RaphaelFilgueiras

he give me the diameter 1cm,the avg velocity 0.2 m/s the temperature is 10 ºC

6. RaphaelFilgueiras

|dw:1343216140402:dw|

7. Natan

in this case $DeltaP=\rho \times Darcy$

8. RaphaelFilgueiras

i dont know darcy formula

9. RaphaelFilgueiras

ok i get it thanks

10. Natan

$darcy= fLV^2/2D$

11. RaphaelFilgueiras

i think there is a $\rho$

12. Natan

rho is the dendisity of the fluid