Eme1wk5 - thermodynamics which states that the subtraction of heat with work is equal to the change of energy The momentum conservation is derived

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Kenny Yu EME1 11/3/08 Mechanical Engineering 103 Today, Roger Davis, a professor came to our class to discuss about mechanical engineering and computational fluid dynamics. In class, they predict air flow and fluid mechanics over vehicles. To find this, they determine the differential equations that govern fluid flow. They must consider the three main laws when finding the air flow: the conservations of mass, momentum, and energy. Davis also explains the Reynold Transport System which states that the subtraction of the flux of property going out with the flux of property coming in is equal to the time-rate change of a property per unit volume. In fluid dynamics, they use the continuity equation to determine the conservation of mass. To compute the conservation of energy, they use the first law of
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Unformatted text preview: thermodynamics which states that the subtraction of heat with work is equal to the change of energy. The momentum conservation is derived similarly to energy and mass. Time-rate changes in momentum are due to changes to spatial changes in fluid inertia, pressure, and fluid stress. The momentum conservation uses Newton’s Law which states that force is equivalent to mass multiplied with acceleration. Davis also explains how turbulence can be modeled using an eddy viscosity approximation with a determined turbulent viscosity coefficient. Turbulence is the random fluctuation in the mean velocity. The main components that make up engineering of fluid dynamics are math, numerics, fluid dynamics, computer science, and visualization....
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This note was uploaded on 08/22/2010 for the course EME 61671 taught by Professor Christinadavis during the Fall '08 term at UC Davis.

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