Generic
Closed Process Daemons: Three Types
of Systems
HOME.
Daemons.
Systems.
Closed.
Process.
Generic
How
many States it takes to describe the b-State and the f-State?
Uniform
Systems
A single b(egin)-State and a single
f(inish)-State
suffice to describe the process for an Uniform
System. Uniform systems made of solids, liquids, gases and gas
mixtures, require a single state for their description at any instant.
Even a saturated mixture, despite the presence of two different phases,
can be described by a single state with x, the quality, defining
the mass fraction of vapor in the mixture.
Non-
Mixing,
Non-
Uniform
There are multiple uniform subsystems,
which do not mix and retain their chemical identity during the process.
For instance, in a system made up of a block of copper immersed in some
water, the two subsystems (part A and B) are the copper block and the water.
To describe the begin and finish states, four States, bA,
bB,
fA
and fB, are necessary. The sub-systems,
A and B, may exchange energy but there is no mixing
and, hence, no mass transfer at any time during the process.
Mixing
Non-
Uniform
Here, too, there are multiple subsystems,
requiring two states, bA and
bB,
to describe the composite b-state.
During the process energy and/or mass transfer between the subsystems are
allowed. Although the daemons allow for a composite finish-state, the mixing
process, if completed, results in a single f-state.
For instance, a system consisting of two different gases, separated
in two chambers in the beginning, can undergo a
mixing
process resulting in a single or composite finish-states depending
on the time allowed for mixing. The daemons can handle either situation.
Generic Closed Process and Its Governing Balance Equations (No change from the parent page.)
