Mixing Fluids
Final mass and temperature when mixing fluids.
The final mass and temperature when mixing fluids are calculated below.
Final Mass of Mixed Fluids
m = m_{1} + m_{2}+ ... + m _{ n } (1)
where
m = final mass (kg, lb)
m _{ 1..n } = mass of substances
Final Temperature of Mixed Fluids
t = (m_{1} c_{1} t_{1} + m_{2}c_{2}t_{2}+ ... + m _{ n } c _{ n } t _{ n } ) / (m_{1} c_{1} + m_{2}c_{2}+ ... + m _{ n } c _{ n } ) (2)
where
t = final temperature ( ^{o}C, ^{o}F)
c _{ 1..n } = specific heat of substances (kJ/kg ^{o}C, Btu/lb ^{o}F)
t _{ 1..n } = temperatures of substances ( ^{o}C, ^{o}F)
Example  Mixing Water with Different Temperatures
10 kg of water with temperature 10 ^{o}C is mixed with 2 kg water with temperature 100 ^{o}C . Specific heat of water is 4.2 kJ/kg ^{o}C .
The final mass of the mixture is
m = (10 kg) + (2 kg)
= 12 kg
The final temperature of the mixture is
t = ((10 kg) (4.2 kJ/kg. ^{o}C ) (10 ^{o}C ) + (2 kg) (4.2 kJ/kg. ^{o}C ) (100 ^{o}C ) ) / ( (10 kg) (4.2 kJ/kg. ^{o}C ) + (2 kg) (4.2 kJ/kg. ^{o}C ) )
= 25 ^{o}C
Mixing Fluids  Final Mass and Temperature Calculator
The calculator below can be used to calculate the final mass and temperature when mixing two fluids.
Fluid 1:
specific heat (kJ/kg ^{o}C, Btu/lb ^{o}F)
Fluid 2:
Mixing Fluids  Required Temperature Calculator
Calculate required temperature for one of the fluids to achieve a final mixed temperature.
Mixture
Fluid 1:
Fluid 2:
Mixing Fluids  Required Mass Calculator
Calculate required mass for one of the fluids to achieve a final mixed temperature.
Mixture
Fluid 1:
Fluid 2:
Related Topics

Fluid Mechanics
The study of fluids  liquids and gases. Involving velocity, pressure, density and temperature as functions of space and time.
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