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Mixing Fluids

Final mass and temperature when mixing fluids.

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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:

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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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