BERNOULLI’S EQUATION

Fluid Flow BERNOULLI’S EQUATION BERNOULLI’S EQUATION Bernoulli’s equation is a special case of the general energy equation that is probably the most widely-used tool for solving fluid flow problems. It provides an easy way to relate the elevation head, velocity head, and pressure head of a fluid. It is possible to modify Bernoulli’s equation in a manner that accounts for head losses and pump work. EO 1.14 DESCRIBE the relationship between Bernoulli’s equation and the First Law of Thermodynamics. EO 1.15 DEFINE the term head with respect to its use in fluid flow. EO 1.16 EXPLAIN the energy conversions that take place in a fluid system between the velocity, elevation, and pressure heads as flow continues through a piping system. EO 1.17 Given the initial and final conditions of the system, CALCULATE the unknown fluid properties using the simplified Bernoulli equation. EO 1.18 DESCRIBE the restrictions applied to Bernoulli’s equation when presented in its simplest form. EO 1.19 EXPLAIN how to extend the Bernoulli equation to more general applications. EO 1.20 RELATE Bernoulli’s principle to the operation of a venturi. General Energy Equation The conservation of energy principle states that energy can be neither created nor destroyed. This is equivalent to the First Law of Thermodynamics, which was used to develop the general energy equation in the module on thermodynamics. Equation 3-8 is a statement of the general energy equation for an open system. Q + (U + PE + KE + PV)_in = W + (U + PE + KE + PV)_out + (U + PE + KE + PV)_stored (3-8) Rev. 0 Page 21 HT-03