Christopher Depcik Shall We Study Statistical Thermodynamics?ĭr. WhatĮnters, what leaves, and what is being generated.ĭr. Took a cross-cut of an engine and watched what In our closed system example before, we were
Christopher Depcik Most everyone is familiar with a car engine Air and fuel (mass) enter the control volume (crossing the control surface) Internal combustion happens changing chemical energy to mechanical energy Heat liberated from the chemical species increases temperature and pressure This pressure pushes down on a piston creating mechanical motion This turns the drive shaft that spins the wheels (crossing the control surface) Exhaust gas is expelled leaving the control volume (crossing the control surface) Example of Open System Surface, and now so can mass bringing “information” along with it.ĭr. Heat transfer and work can cross the control In an open system, the control volume contains the region of D System ~ Control Volume Boundary ~ Control Surface Of note, as mass enters or exits the control volume it brings/carries with it information such as energy and momentum (discussed later) Open System
Christopher Depcik In an open system, mass can now enter and exit the system The system is now called a control volume whereas, the boundary is now called a control surface Of note, the following are often used interchangeably by Dr. Youtube/watch?v=Bz02z4GSS0k wiley/college/moran/0470495901/animations/system_types/system_types.html MSBB – p. Christopher Depcik Special type of a closed system in which there is no heat or work transferred across the boundary Hence, there is no interaction with the surroundings This does not mean necessarily that nothing is happening For example, imagine right after food dye is dropped into water The mass is constant within the system however, diffusion of the dye will happen (concentration & temperature gradients if dye is different temperature than water) Isolated System The boundary illustrates theĭelineation between the system and surroundings.ĭr. Wiley/college/moran/0470495901/animations/system_types/system_types.htmlĪn illustration of a tank defining the system under study and the Christopher Depcik The system is what will be studied in the thermodynamic analysis within this class The surroundings are everything external to this system The system is separated from the surroundings by a defined boundary Introduction Christopher Depcik System and Surroundings Properties Density, Pressure, (Velocity), and Temperature (ME 510) Concepts State and Process Units Outlineĭr. Christopher Depcik University of Kansas Department of Mechanical Engineeringĭr. SWFI is a minority-owned organization.Dr. SWFI facilitates sovereign fund, pension, endowment, superannuation fund and central bank events around the world.
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