Mass in Control volume Mass out

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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Define the energy content of a control volume can be changed by mass flow as well as by heat and work interactions.

Mass
in
Control
volume
Mass
out
Transcribed Image Text:Mass in Control volume Mass out
Expert Solution
Change in total energy of a system:

Consider a control volume exchanging heat Q as well as work W with the surroundings. Also certain mass enters through one point of a system and exits through another point of the system. If the total mass energy entering and exiting the control volume is E˙min and E˙mout respectively, then according to the conservation of energy, the change in total energy of a system can be given as,

Q-W+E˙min-E˙mout=ΔECV

So, the change in total energy of a control volume depends upon the mass flow, heat and work interactions.

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