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Determining Mass Flow Rate

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Water enters a 2 meter diameter pipe at a temperature of 23 deg C. The water leaves the pipe at a temperature of 97 deg C The laminar flow rate is such that the Reynolds number is 800. What is the mass flow rate?

a) Less than or equal to 0.5 kg/sec.

b) Equal to or greater than 0.2 m/sec.

c) Greater than 0.5 kg/sec.

d) Cannot be determined from the information provided.

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Solution Preview

Use average temperature = (97+23)/2 = 60 C.
Density = 983 kg/m3
Viscosity ...

Solution Summary

The mass flow rate for a laminar flow with a Reynolds number of 800 is determined. The pipe at different temperatures is analyzed.

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Determining flow rates- volumetric versus mass flow rates

A flow meter reads 10 liters per minute. The flow is comprised of a 7% solution of water and Chemical A.

The % solution is known by Wgt Chemical A/Wgt Chemical A + Wgt of Water

Chemical A has a given specific gravity of 2.8 as compared to water...the MW of Chemical A is given as 435 g/mol

Therefore, for every 1 liter per minute of volume flow:

1) What is the mass of Chemical A in that 1 liter
2) What is the mass of water in that 1 liter
3) What is the density of the combined solution of water and Chemical A

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