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Tools · Fluids & Thermodynamics

VLE Parameter Regression

Fit binary NRTL interaction parameters to measured Txy or Pxy vapor–liquid equilibrium data

Open in the appRun via API

Hardware and price

Price per run

What a typical run reserves from your wallet: the catalog's expected runtime on each piece of hardware × your plan's per-second rate. Larger inputs reserve more, and you're charged only for the seconds the job actually runs.

VLE Parameter Regression: reservation per run, USD
HardwareTypical runtimeBasicStarterProEnterprise
CPUDefault5 min$0.042$0.024$0.015$0.009

In workflows

Chain it with other steps.

Each input and output has a data kind, so the builder only connects steps that fit.

Inputs

  • Table (list) · optionalCSV, JSON
  • Table (list) · optionalCSV, JSON

Outputs

  • ArchiveZIP
  • TableCSV
  • TableCSV

References

The method behind it.

  1. Ding-Yu Peng, Donald B. Robinson (1976). A New Two-Constant Equation of State. Industrial & Engineering Chemistry Fundamentals. doi:10.1021/i160057a011 (opens in a new tab)
  2. Giorgio Soave (1972). Equilibrium constants from a modified Redlich-Kwong equation of state. Chemical Engineering Science. doi:10.1016/0009-2509(72)80096-4 (opens in a new tab)
  3. Henri Renon, J. M. Prausnitz (1968). Local compositions in thermodynamic excess functions for liquid mixtures. AIChE Journal. doi:10.1002/aic.690140124 (opens in a new tab)

Run via API

Submit it from your own code.

Use an API key from your account. The estimate uses your plan's rates; submitting reserves that amount from your wallet.

# Estimate the reservation for your plan (payload fields: see the API reference)
curl -X POST https://api.cognichem.com/api/v1/jobs/estimate \
  -H "X-Api-Key: $COGNICHEM_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"job_type": "vle-regress", "resource": "cpu", "payload": {}}'

# Submit (retrying with the same Idempotency-Key never submits twice)
curl -X POST https://api.cognichem.com/api/v1/jobs/submit \
  -H "X-Api-Key: $COGNICHEM_API_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"job_name": "vle-regress-1", "job_type": "vle-regress", "resource": "cpu", "payload": { ... }}'
Payload fields and examples in the docs

Fluids & Thermodynamics

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