Custom flash

This function calculates equilibrium condition with any number of fixed and freed system parameters.

custom

POST https://api.olisystems.com/engine/flash/{dbs_file_id}/custom

run a custom equilibrium calculation

Headers

Name	Type	Description
Authorization	string	Bearer {access_token}
Content-Type	string	application/json

200 Please look at "API call blueprint" page on how to obtain results

{
	"code": 200,
	"data": {
		"file_id": "dee854a6-59db-487d-ad08-a20dee691133",
		"jobId": "f6b3375e-cd0f-4ace-a5ee-71e047b76754",
		"resultsLink": "https://api.olisystems.com/result/flash/f6b3375e-cd0f-4ace-a5ee-71e047b76754?context=engine",
		"status": "IN PROGRESS"
	},
	"message": "Process execution started Successfully",
	"status": "SUCCESS"
}

Request payload

{
    "params": {
        "temperature": {
            "value": 40.0,
            "unit": "°C"
        },
        "pressure": {
            "value": 1.5,
            "unit": "atm"
        },
        "fixedVars": [
            {
                "type": "vaporPhaseComposition",
                "name": "BENZENEVAP",
                "value": 16.0,
                "unit": "mole %"
            },
            {
                "type": "property",
                "name": "volume",
                "value": 440.0,
                "unit": "L"
            }
        ],
        "freedVars": [
            {
                "type": "inflow",
                "name": "BENZENE",
                "value": 0.0,
                "unit": "mol"
            },
            {
                "type": "state",
                "name": "temperature",
                "value": 0.0,
                "unit": "°C"
            }
        ],
        "inflows": {
            "unit": "mol",
            "values": {
                "H2O": 50.0,
                "BENZENE": 10.0,
                "CH4": 20.0,
                "NACL": 35.0
            },
            "totalAmount":
            {
                "value": 115.0,
                "unit": "mol"
            }
        }
}

params	type	description
temperature	valueObject	specified or initial guess temperature with unit
pressure	valueObject	specified or initial guess pressure with unit
fixedVars	array of objects	list of objects to describe fixed flash output variables
freedVars	array of objects	list of objects to describe freed flash input variables

The sizes of the object arrays, params.fixedVars and params.freedVars must be equal

Here is a description of the type and name attributes for the params.fixedVars array

params.fixedVars[index_number].type	params.fixedVars[index_number].name
property	volume, enthalpy, pH
liquid1PhaseComposition	species name of liquid phase
liquid2PhaseComposition	species name of liquid phase
vaporPhaseComposition	species name of vapor phase
solid	species name of solid phase

species name can be retrieved from chemistry information call under result.species(trueName), respectively.

Here is a description of the unit attribute for the params.fixedVars array

params.fixedVars[index_number].type or .name	params.fixedVars[index_number].unit
liquid1PhaseComposition, liquid2PhaseComposition, vaporPhaseComposition	mol/mol, mole %, ppm (mole)
solid	mol, kgmol, lbmol, mmol, µmol, (mol/100)
volume	L, ml, cm3, m3, E3m3, E6m3, ft3, Mft3, MMft3, gal, MMgal, bbl
enthalpy	cal, E3cal, E6cal, J, kJ, MJ, Btu, MMBtu

This section explains the available flash input variables can be freed for this calculation

params.freedVars[index_number].type	params.freedVars[index_number].name	params.freedVars[index_number].unit
state	temperature	°C, K, °F, R
state	pressure	atm, bar, barg, mbar, Pa, kPa, MPa, mmHg, Torr, inHg, psia, psig, inH2O, kg/cm2
inflow	inflow name	mol, kgmol, lbmol, mmol, µmol, (mol/100)

in addition to the inputs shown above some optional properties may also be specified. They can be viewed here

JSON output (status = PROCESSED)

{
    "code": 200,
    "data": {
        "result": {
            ...<snip>...
            "calculatedVariables": [
                {
                    "name": "BENZENE",
                    "value": 4.048793029736938,
                    "unit": "mol"
                },
                {
                    "name": "temperature",
                    "value": 45.5766850916292,
                    "unit": "°C"
                }
            ]
        }
    }, 
    "message": "Results returned successfully", 
    "status": "PROCESSED"
}

The output of this calculation is the stream output which is common result output for all OLI's flash calculations or an error. In addition to this output the result also contains the values of the free variables which can be conveniently retrieved from the result.calculatedVariables array

result.calculatedVariables [{}]	type	description
name	string	name of calculated variable
value	number	value of calculated variable
unit	string	unit of the calculated variable

Survey Calculation

Survey calculation is supported for the variables below. Please refer to Survey calculation for explained input schema.

supported params.surveyInputs[{}].field

"/params/temperature/value"

"/params/pressure/value"

"/params/fixedVars/i/value" where i is the index (0 based) of params.fixedVars to be surveyed

"/params/freedVars/i/value" where i is the index (0 based) of params.freedVars to be surveyed