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.© BrainMass Inc. brainmass.com October 24, 2018, 11:07 pm ad1c9bdddf
Use average temperature = (97+23)/2 = 60 C.
Density = 983 kg/m3
The mass flow rate for a laminar flow with a Reynolds number of 800 is determined. The pipe at different temperatures is analyzed.
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