Description
Return vapor phase fraction from a two-phase lever rule.
A process stream can be described on mass, mole, phase or solvent bases, which are not interchangeable. Lever rules, partition factors and operating-line terms assume compatible composition definitions and an appropriate physical model; a local balance does not determine equilibrium properties or a complete separation design.
Return vapor phase fraction from a two-phase lever rule.
When to use this tool
Use Chemical Engineering: Separator Phase Fraction Lever Rule when checking the stated stream composition, phase or separation-model term.
How to use the tool and how it works
- Enter overallFraction, liquidFraction, vaporFraction. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read result. Expand result to inspect the returned fields.
Return vapor phase fraction from a two-phase lever rule. Require all composition fractions in [0,1], unequal liquid/vapor compositions and overall between them; vaporPhaseFraction = (overall-liquid)/(vapor-liquid).1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| overallFraction | Overall Fraction | Required. Finite number. |
| liquidFraction | Liquid Fraction | Required. Finite number. |
| vaporFraction | Vapor Fraction | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| result | Returned calculated value or nested object under the stated output convention. | Required. Object. |
| result.vaporPhaseFraction | (overallFraction-liquidFraction)/(vaporFraction-liquidFraction) on a consistent mass or mole basis. | Calculated result member: number. |
{
"input": {
"overallFraction": 0.4,
"liquidFraction": 0.2,
"vaporFraction": 0.8
},
"output": {
"result": {
"vaporPhaseFraction": 0.3333333333333333
}
}
}Limitations and assumptions
- Every composition must use the same mole or mass basis; actual phase equilibrium and thermodynamic feasibility are not established.
- Outputs are nested inside result. Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use verified equilibrium and material-property data on consistent bases and solve the complete process model for actual separation or equipment decisions.
References
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