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The following types of GVF profiles do not exist
- a)C2H1A1
- b)C2H2A1
- c)C2H1A2
- d)C1H1A1
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The following types of GVF profiles do not exista)C2H1A1b)C2H2A1c)C2H1...
GVF Profiles:
- Gradually varied flow is defined as steady, non-uniform flow where the depth of flow varies gradually from section to section along the length of the channel.
- GVF flow profiles help to understand flow patterns i.e how flow depth varies in a channel.
- GVF Profiles are classified on the basis of channel slope and flow depth in relation to y0 and yc. (where y0 = Normal depth of flow and yc = critical depth of flow ).
- GVF profiles on the basis of channel slope:
1) Mild slope: S0< Sc and y0 > yc
For Mild slope, flow is subcritical at normal depth as flow depth is more than critical depth.
Flow profile - M1 - M2 - M3
For Mild slope, flow is subcritical at normal depth as flow depth is more than critical depth.
Flow profile - M1 - M2 - M3
2. Steep slope: S0> Sc and y0 < yc
For steep slope flow is super critical at normal depth as flow depth is is less than critical depth.
Flow profile - S1 - S2 - S3
For steep slope flow is super critical at normal depth as flow depth is is less than critical depth.
Flow profile - S1 - S2 - S3
3. Critical Slope: S0 = Sc and y0 = yc
For critical slope flow is critical at normal depth as the depth of flow is equal to critical depth.
Flow Profile - C1 - C3
As the normal depth and critical depth are the same therefore C2 profile does not exist.
For critical slope flow is critical at normal depth as the depth of flow is equal to critical depth.
Flow Profile - C1 - C3
As the normal depth and critical depth are the same therefore C2 profile does not exist.
4. Horizontal Slope: S0 = 0 and y0 → ∞
Flow Profile - H2 - H
As y0 → ∞, Can not sustain uniform flow and H1 flow profile does not exist.
Flow Profile - H2 - H
As y0 → ∞, Can not sustain uniform flow and H1 flow profile does not exist.
5. Adverse Slope: S0 < 0 and y0 → ∞
Flow Profile - A2 - A3
As y0 → ∞, Can not sustain uniform flow and A1 flow profile do not exist.
Flow Profile - A2 - A3
As y0 → ∞, Can not sustain uniform flow and A1 flow profile do not exist.
Most Upvoted Answer
The following types of GVF profiles do not exista)C2H1A1b)C2H2A1c)C2H1...
Explanation:
GVF stands for "Gas Volume Fraction" profiles, which describe the distribution of gas in a multiphase flow. The GVF profile is typically represented by the symbol 'CmHnAi', where 'm' represents the number of continuous phases, 'n' represents the number of dispersed phases, and 'i' represents the number of annular phases.
In the given options, we have the following profiles:
a) C2H1A1
b) C2H2A1
c) C2H1A2
d) C1H1A1
To determine which profiles do not exist, we need to understand the meaning of the symbols 'C', 'H', and 'A' in the GVF profiles.
C: Continuous Phase
The 'C' symbol represents the continuous phase in the multiphase flow. It refers to the phase that is present in larger quantities and forms a continuous bulk. It could be a liquid or a gas phase.
H: Dispersed Phase
The 'H' symbol represents the dispersed phase(s) in the multiphase flow. It refers to the phase(s) that is present in smaller quantities and is dispersed within the continuous phase. It could also be a liquid or a gas phase.
A: Annular Phase
The 'A' symbol represents the annular phase in the multiphase flow. It refers to the phase that forms a thin film or annular layer around the inside wall of the pipe or conduit.
Now, let's analyze the given options:
a) C2H1A1
This profile represents 2 continuous phases, 1 dispersed phase, and 1 annular phase. Such a profile is possible in a multiphase flow system where there are multiple continuous phases, one dispersed phase, and one annular phase. Therefore, this profile exists.
b) C2H2A1
This profile represents 2 continuous phases, 2 dispersed phases, and 1 annular phase. Such a profile is also possible in a multiphase flow system where there are multiple continuous phases, multiple dispersed phases, and one annular phase. Therefore, this profile exists.
c) C2H1A2
This profile represents 2 continuous phases, 1 dispersed phase, and 2 annular phases. Such a profile is also possible in a multiphase flow system where there are multiple continuous phases, one dispersed phase, and multiple annular phases. Therefore, this profile exists.
d) C1H1A1
This profile represents 1 continuous phase, 1 dispersed phase, and 1 annular phase. Such a profile is possible in a multiphase flow system where there is one continuous phase, one dispersed phase, and one annular phase. Therefore, this profile exists.
Conclusion:
Based on the analysis, the correct answer is option 'A'. All the given GVF profiles (a, b, c, and d) exist in a multiphase flow system.
GVF stands for "Gas Volume Fraction" profiles, which describe the distribution of gas in a multiphase flow. The GVF profile is typically represented by the symbol 'CmHnAi', where 'm' represents the number of continuous phases, 'n' represents the number of dispersed phases, and 'i' represents the number of annular phases.
In the given options, we have the following profiles:
a) C2H1A1
b) C2H2A1
c) C2H1A2
d) C1H1A1
To determine which profiles do not exist, we need to understand the meaning of the symbols 'C', 'H', and 'A' in the GVF profiles.
C: Continuous Phase
The 'C' symbol represents the continuous phase in the multiphase flow. It refers to the phase that is present in larger quantities and forms a continuous bulk. It could be a liquid or a gas phase.
H: Dispersed Phase
The 'H' symbol represents the dispersed phase(s) in the multiphase flow. It refers to the phase(s) that is present in smaller quantities and is dispersed within the continuous phase. It could also be a liquid or a gas phase.
A: Annular Phase
The 'A' symbol represents the annular phase in the multiphase flow. It refers to the phase that forms a thin film or annular layer around the inside wall of the pipe or conduit.
Now, let's analyze the given options:
a) C2H1A1
This profile represents 2 continuous phases, 1 dispersed phase, and 1 annular phase. Such a profile is possible in a multiphase flow system where there are multiple continuous phases, one dispersed phase, and one annular phase. Therefore, this profile exists.
b) C2H2A1
This profile represents 2 continuous phases, 2 dispersed phases, and 1 annular phase. Such a profile is also possible in a multiphase flow system where there are multiple continuous phases, multiple dispersed phases, and one annular phase. Therefore, this profile exists.
c) C2H1A2
This profile represents 2 continuous phases, 1 dispersed phase, and 2 annular phases. Such a profile is also possible in a multiphase flow system where there are multiple continuous phases, one dispersed phase, and multiple annular phases. Therefore, this profile exists.
d) C1H1A1
This profile represents 1 continuous phase, 1 dispersed phase, and 1 annular phase. Such a profile is possible in a multiphase flow system where there is one continuous phase, one dispersed phase, and one annular phase. Therefore, this profile exists.
Conclusion:
Based on the analysis, the correct answer is option 'A'. All the given GVF profiles (a, b, c, and d) exist in a multiphase flow system.
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