The two fluids are chemically identical and
represented
by the phase-change model. Example:
Liquid water and steam in two tanks are allowed to mix partially.
SL Model
Constant density
and
constant specific heats(c_p=c_v=c)
characterize the pure solid or liquid model. The
two substances, A and B, are identical. Example:
Oil at two different states in two chambers are allowed to mix partially.
Gases:
PG Model
Constant density
and
constant specific heats
(c_p=c_v=c)
characterize the pure solid or liquid model. The
two gases, A and B, are identical. Example:CO2 at two different states in two chambers are allowed to mix partially.
IG Model
Obeys the ideal
gas equation (pv=RT). Specific heats are temperature dependent. The
two gases, A and B, are identical. Example:
CO2 at two different states in two chambers are allowed to mix partially.
RG Model
Based on the generalized compressibility
chart (pv=ZRT), the real gas model can handle a large
number
of fluids in their liquid, vapor or gaseous states. The
two gases, A and B, are identical. Example:Propane
at two different states in two chambers are allowed to mix partially.
Two Different
Gases:
PG+PG
Model
IG+IG
Model
RG+RG
Model
The two gases, A and
B, can be chemically
different. Example:
O2 and N2 in two tanks are allowed to mix partially.
Specific Closed Process and Its Governing Balance Equations
System
Animation of a closed non-uniform system going through a semi-mixing process. The begin-state is composed of two states bA and bB states (non-uniform). As the valve between the two chambers is opened and the two working fluids (can be the same fluid at two different state) begin to mix. However, before the mixing is complete the valve is closed. When equilibrium is finally achieved, two states -fA and fB states - are required to describe the finish state. Although the system is closed, as indicated by the red system boundary, the sub-systems are clearly open and much harder to analyze. For specific examples of semi-mixing closed processes, visit TEST.VT.Chapter-5 pages.
