From the well-known expression for kinetic energy of mass ![]() ![]() ![]() ![]() (...where ![]() ![]() ![]() ![]() the specific value of kinetic energy, which is what we need for our equations, is ![]() ![]() - differentiating it results in the expression for infinitesimal change to be inserted into the Bernoullis' theorem: ![]() ![]() |
This result is now added to the two terms in the Bernoullis' equation
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Fig.C-2 Simple cases To avoid the difficulty of more complex situations, the first parct of the present chapter [C] concentrates ob basic aerodynamic pheno- mena in which the position energy term is not important. The next part then discusses outflow of liquid from vessels where the integration is per- formed between positions where there is equal pressure, so that it is not necessary to consider the pressure energy term. |
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Vaclav TESAR : "BASIC FLUID MECHANICS"