Lect 10 rate processes

Lect 10 rate processes - Lectur e 10 Rate Pr ocesses...

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Unformatted text preview: Lectur e 10 Rate Pr ocesses Material adapted from TAMU Objectives Know the definitions of and the relationships between rate, flux, and driving force. Define the proportionality constants for heat, fluid flow, electricity, and diffusion problems. Know how to compute the rate and flux for heat, fluid flow, electricity, diffusion problems. 2 Rates Critical in Engineering Rate can be defined in two ways conceptually. Rate, r , is the amount a quantity changes per unit time. t time in Change N Quantity in Change t N r Rate = = = Flow Rate Flow r ate, r , is the amount of quantity N that flows by a point in a given length of time. Examples: volumetric flow rate, rate of energy, current t N r = = Rate Flow Water Filling a Tank The volume in the tank changes at a rate, r 1 . The water goes past the pipe outlet at flow rate , r 2 . For this case, because there is no outlet in the tank, the volume changes at the same rate as the water flows in, thus r 1 = r 2 = r....
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This note was uploaded on 03/11/2010 for the course ENGI 150 taught by Professor Annsaterbak during the Fall '08 term at Rice.

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Lect 10 rate processes - Lectur e 10 Rate Pr ocesses...

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