Page 62 - ebook fluid mechanics_finalize

FLUID MECHANICS

At Figure 3.18, when an object is immersed in a fluid, there is an upward buoyant force

equal to the weight of the volume of fluid displaced by the object. This applies to either

full or partial immersion.

For a fully submerged object, Archimedes' principle can be reformulated as follows:

Apparent immersed weight = weight of object – weight of displaced fluid

then inserted into the quotient of weights, which has been expanded by the mutual

volume

yields the formula below. The density of the immersed object relative to the density of
the fluid can easily be calculated without measuring any volumes:

Figure 3.19 : Buoyancy Principle

At Figure 3.19, When a solid object is wholly or partly immersed in a fluid, the fluid

molecules are continually striking the submerged surface of the object. The forces due to

these impacts can be combined into a single force the buoyant force which counteracts

the weight.

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