Reynolds Number (turbulent flow)

soufiane002 · November 30, 2017, 09:02

hi
please i need help
how to calculate the Reynolds number with presence of a grid in the inlet
the inlet velocity is 6.55 m/s
the diameter of the tube is 0.4 cm
the grid mesh 0.0254 m
the fluide is Air

they obtained ~11000

how they calculate it

xava · November 30, 2017, 09:16

hi soufiane002,

The Reynolds number is calculated using:

l=0.0254
rho=1.225
mu=1.7894E-5
v=6.55
reynolds_no=v*rho*(l)/mu

with l the characteristic length, when setting this equal to the grid mesh, Re equals 11389.

Cheers, xava

November 30, 2017, 09:02	Reynolds Number (turbulent flow)	#1
soufiane002 New Member Join Date: Sep 2016 Posts: 20 Rep Power: 10	hi please i need help how to calculate the Reynolds number with presence of a grid in the inlet the inlet velocity is 6.55 m/s the diameter of the tube is 0.4 cm the grid mesh 0.0254 m the fluide is Air they obtained ~11000 how they calculate it

November 30, 2017, 09:16		#2
xava New Member Xavation Join Date: Dec 2016 Posts: 9 Rep Power: 10	hi soufiane002, The Reynolds number is calculated using: l=0.0254 rho=1.225 mu=1.7894E-5 v=6.55 reynolds_no=vrho(l)/mu with l the characteristic length, when setting this equal to the grid mesh, Re equals 11389. Cheers, xava soufiane002 likes this.

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