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



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Natan
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64/Re

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

Natan
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bernoulli equation + losses

Natan
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Depending on the system configuration you make the adjustments

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

RaphaelFilgueiras
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dw:1343216140402:dw

Natan
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in this case
\[DeltaP=\rho \times Darcy\]

RaphaelFilgueiras
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i dont know darcy formula

RaphaelFilgueiras
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ok i get it thanks

Natan
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\[darcy= fLV^2/2D\]

RaphaelFilgueiras
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i think there is a
\[\rho \]

Natan
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rho is the dendisity of the fluid