Olga Erosional Velocity

Boundary Variables

Description ( See also: Variables)

WCST,GORST, QGST, QLST, QOST and QWST are given at standard conditions (60 oF, 1 atm). A single stage flash from in-situ to standard conditions has been performed, that is, mass transfer between the phases from in-situ to standard conditions is taken into account. The gas is not dehydrated unless WATERFLASH = OFF. For table-based simulations, OLGA uses the gas mass fractions and densities from the fluid property file to perform the conversion.

Note: These variables are CPU demanding for Compositional Tracking simulations since a flash must be performed for each section and time they are plotted, and should be used with care.

Erosional Velocity ratio

The erosional velocity ratio (EVR) defined in API RP-14E is: EVR = C-1(EVRVACTUAL)(EVRRHOMIX)1/2 where EVRVACTUAL =|Usg| + |Usl| + |Usd|, EVRRHOMIX = [ g|Usg| + l(|Usl| + |Usd)|]/(|Usg|+|Usl| + |Usd|), and C = 100 for U in ft/s and in Lb/ft3

C = 121.99 for U in m/s and in kg/m3 Here |Usg|, |Usl| and |Usd| denote the absolute value of the superficial velocity for gas, liquid film and liquid droplets respectively. Similarly g and l denote the gas and liquid density.

Boundary Variables ( See also: Description)

Pgina 1 de 7Boundary Output Variables

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Use as Name Units Definition



Boundary Variables O|TP|PP|C ACCGAG KG Accumulated gas mass flow O|TP|PP|C ACCGAQ M3 Accumulated gas volume flow O|TP|PP|C ACCGT KG Accumulated total mass flow O|TP|PP|C ACCLIG KG Accumulated liquid mass flow O|TP|PP|C ACCLIQ M3 Accumulated liquid volume flow O|TP|PP|C ACCOIG KG Accumulated oil mass flow O|TP|PP|C ACCOIQ M3 Accumulated oil volume flow O|TP|PP|C ACCWAG KG Accumulated water mass flow O|TP|PP|C ACCWAQ M3 Accumulated water volume flow O|TP|PP|C CFLFACT NoUnit Local CFL factor

O|TP|PP|C CGR SM3/SM3 Ratio between condensate and dry gas (with water vapour).

O|TP|PP|C DPZ_GRAV_FACTOR - Factor describing the gravity domination of the flow O|TP|PP|C DPZA PA/M Additional pressure drop gradient O|TP|PP|C DPZF PA/M Frictional pressure drop gradient O|TP|PP|C DPZG PA/M Gravitational pressure drop gradient O|TP|PP|C DS NoUnit Distribution slip ratio O|TP|PP|C DUG M/S2 Time derivative of gas velocity O|TP|PP|C DUL M/S2 Time derivative of liquid velocity O|TP|PP|C EVR NoUnit Erosional velocity ratio

O|TP|PP|C EVRRHOMIX KG/M3 Mixed density used in calculation of erosional velocity ratio

O|TP|PP|C EVRVACTUAL M/S Actual volume flux used in calculation of erosional velocity ratio.

O|TP|PP|C FRRG KG/M3-S Gas wall drift friction factor O|TP|PP|C FRRH KG/M3-S Oil wall drift friction factor O|TP|PP|C FRRW KG/M3-S Water wall drift friction factor O|TP|PP|C GASMFRBOUN - Gas mass fraction at boundary O|TP|PP|C GD KG/S Droplet mass flow O|TP|PP|C GDHL KG/S Mass flow rate of oil in droplet field O|TP|PP|C GDWT KG/S Mass flow rate of water in droplet field O|TP|PP|C GG KG/S Gas mass flow O|TP|PP|C GL KG/S Liquid bulk mass flow O|TP|PP|C GLHL KG/S Mass flow rate of oil in film O|TP|PP|C GLRST SM3/SM3 Gas/liquid ratio at standard conditions O|TP|PP|C GLT KG/S Total liquid mass flow O|TP|PP|C GLTHL KG/S Mass flow rate of oil O|TP|PP|C GLTWT KG/S Mass flow rate of water excluding vapour O|TP|PP|C GLWT KG/S Mass flow rate of water in film O|TP|PP|C GLWV KG/S Mass flow rate of water vapour O|TP|PP|C GLWVT KG/S Total mass flow rate of water including Vapour



O|TP|PP|C GORST SM3/SM3 Gas/oil ratio at standard conditions

O|TP|PP|C GORST_DRY SM3/SM3 Dry gas/oil ratio at standard conditions. Gas does not include water vapour.

O|TP|PP|C GT KG/S Total mass flow O|TP|PP|C HOLHLNS - No-slip oil volume fraction O|TP|PP|C HOLNS - No-slip liquid volume fraction O|TP|PP|C HOLWTNS - No-slip water volume fraction O|TP|PP|C HTOT W Total Enthalpy flow rate

O|TP|PP|C ID NoUnit Flow regime: 1=Stratified, 2=Annular, 3=Slug, 4=Bubble.

O|TP|PP|C IDWHBUB NoUnit Oil/water flowregime indicator for slug bubble: 0=Stratified smooth, 1=Stratified wavy, 2=Dispersed, -1= not applicable.

O|TP|PP|C IDWHSEP NoUnit Oil/water flowregime indicator for separated flow: 0=Stratified smooth, 1=Stratified wavy, 2=Dispersed, -1= not applicable.

O|TP|PP|C IDWHSLU NoUnit Oil/water flowregime indicator for slug: 0=Stratified smooth, 1=Stratified wavy, 2=Dispersed, -1= not applicable.

O|TP|PP|C IKH NoUnit Inviscid Kelvin-Helmoltz factor O|TP|PP|C INHIBMFRBOUN - Inhibitor mass fraction in water at boundary

O|TP|PP|C LAMTURB_GAS - Blending parameter between laminar and turbulent flow, gas layer

O|TP|PP|C LAMTURB_OIL - Blending parameter between laminar and turbulent flow, oil layer

O|TP|PP|C LAMTURB_WATER - Blending parameter between laminar and turbulent flow, water layer

O|TP|PP|C MDHLCONV KG/M3 Specific convective mass of oil droplets O|TP|PP|C MDHLSLOPE KG/M3 Specific mass adjustment of oil droplets O|TP|PP|C MDWTCONV KG/M3 Specific convective mass of water droplets O|TP|PP|C MDWTSLOPE KG/M3 Specific mass adjustment of water droplets O|TP|PP|C MGCONV KG/M3 Specific convective mass of gas O|TP|PP|C MGSLOPE KG/M3 Specific mass adjustment of gas O|TP|PP|C MLHLCONV KG/M3 Specific convective mass of oil in film O|TP|PP|C MLHLSLOPE KG/M3 Specific mass adjustment of oil in film O|TP|PP|C MLWTCONV KG/M3 Specific convective mass of water in film O|TP|PP|C MLWTSLOPE KG/M3 Specific mass adjustment of water in film O|TP|PP|C PSID KG/M3-S Deposition rate O|TP|PP|C PSIE KG/M3-S Entrainment rate O|TP|PP|C QD M3/S Droplet volume flow O|TP|PP|C QDHL M3/S Volumetric flow rate oil droplets O|TP|PP|C QDWT M3/S Volumetric flow rate water droplets O|TP|PP|C QG M3/S Gas volume flow O|TP|PP|C QGST SM3/S Gas volume flow at standard conditions



O|TP|PP|C QGST_DRY SM3/S Dry gas volume flow at standard conditions. Water vapour is removed from flow.

O|TP|PP|C QL M3/S Liquid bulk volume flow O|TP|PP|C QLHL M3/S Volumetric flow rate oil film O|TP|PP|C QLST SM3/S Liquid volume flow at standard conditions O|TP|PP|C QLT M3/S Total liquid volume flow O|TP|PP|C QLTHL M3/S Volumetric flow rate oil O|TP|PP|C QLTWT M3/S Volumetric flow rate water O|TP|PP|C QLWT M3/S Volumetric flow rate water film O|TP|PP|C QOST SM3/S Oil volume flow at standard conditions O|TP|PP|C QT M3/S Total volume flow O|TP|PP|C QWST SM3/S Water volume flow at standard conditions

O|TP|PP|C QWTST SM3/S Total water (liquid and vapour) volume flow at standard conditions

O|TP|PP|C SHRHL 1/s Oil film - shear strain rate O|TP|PP|C SHRWT 1/s Water film - shear strain rate O|TP|PP|C SLAG KG/M3-S Gas friction coefficient O|TP|PP|C SLAI KG/M3-S Interfacial friction coefficient O|TP|PP|C SLAIGHL KG/M3-S Gas/oil film interfacial friction factor O|TP|PP|C SLAIHLWT KG/M3-S Oil film/water film interfacial friction factor O|TP|PP|C SLAIWTG KG/M3-S Water film/gas interfacial friction factor O|TP|PP|C SLAL KG/M3-S Liquid friction coefficient O|TP|PP|C SLALHL KG/M3-S Oil film wall friction factor O|TP|PP|C SLALWT KG/M3-S Water film wall friction factor O|TP|PP|C SLGH KG/M3-S Oil wall friction due to gas O|TP|PP|C SLGW KG/M3-S Water wall friction due to gas O|TP|PP|C SLHG KG/M3-S Gas wall friction due to oil O|TP|PP|C SLWG KG/M3-S Gas wall friction due to water O|TP|PP|C STDROG KG/M3 Standard gas density O|TP|PP|C STDROHL KG/M3 Standard oil density O|TP|PP|C STDROWT KG/M3 Standard water density O|TP|PP|C TAUWG PA Gas - wall shear stress O|TP|PP|C TAUWGA PA Gas - average wall shear stress O|TP|PP|C TAUWHL PA Oil film - wall shear stress O|TP|PP|C TAUWHLA PA Oil film - average wall shear stress O|TP|PP|C TAUWWT PA Water film - wall shear stress O|TP|PP|C TAUWWTA PA Water film - average wall shear stress O|TP|PP|C TC_GH - Turbulence parameter gas-oil interface, gas side O|TP|PP|C TC_HG - Turbulence parameter gas-oil interface, oil side O|TP|PP|C TC_HW - Turbulence parameter oil-water interface, oil side O|TP|PP|C TC_WH - Turbulence parameter oil-water interface, water side O|TP|PP|C TINHIBMFRBOUN - Inhibitor mass fraction in water+vapour at boundary



O|TP|PP|C TRBPAR_CAP - Capilary number from the TURBPAR routine O|TP|PP|C TRBPAR_FROUD - Froud number from the TURBPAR routine

O|TP|PP|C TRBPAR_REYG - Reynolds number for gas layer from the TURBPAR routine

O|TP|PP|C TRBPAR_REYH - Reynolds number for oil layer from the TURBPAR routine

O|TP|PP|C TRBPAR_REYI - Reynolds number for gas oil interface from the TURBPAR routine

O|TP|PP|C TRBPAR_WEB - Weber number from the TURBPAR routine O|TP|PP|C TWATMFRBOUN - Total water mass fraction at boundary O|TP|PP|C UD M/S Droplet velocity O|TP|PP|C UDHL M/S Oil droplet velocity O|TP|PP|C UDO M/S Relative velocity droplets O|TP|PP|C UDWT M/S Water droplet velocity O|TP|PP|C UG M/S Gas velocity O|TP|PP|C UHLCONT M/S Oil continuous velocity O|TP|PP|C UL M/S Average liquid film velocity O|TP|PP|C ULHL M/S Oil film velocity O|TP|PP|C ULWT M/S Water film velocity O|TP|PP|C UO M/S Relative velocity O|TP|PP|C USD M/S Superficial velocity total liquid droplets O|TP|PP|C USDHL M/S Superficial oil droplet velocity O|TP|PP|C USDWT M/S Superficial water droplet velocity O|TP|PP|C USG M/S Superficial velocity gas O|TP|PP|C USL M/S Superficial velocity total liquid film O|TP|PP|C USLHL M/S Superficial oil film velocity O|TP|PP|C USLT M/S Superficial velocity liquid (USL+USD) O|TP|PP|C USLTHL M/S Superficial velocity oil O|TP|PP|C USLTWT M/S Superficial velocity water O|TP|PP|C USLWT M/S Superficial water film velocity O|TP|PP|C USTOT M/S Total volume flux O|TP|PP|C UWTCONT M/S Water continuous velocity O|TP|PP|C VKH NoUnit Viscous Kelvin-Helmoltz factor O|TP|PP|C WATMFRBOUN - Water mass fraction at boundary O|TP|PP|C WCST - Water cut at standard conditions O|TP|PP|C WD KG/S-M2 Droplet mass flux O|TP|PP|C WDHL KG/S-M2 Mass flux of oil in droplet field O|TP|PP|C WDWT KG/S-M2 Mass flux of water in droplet field O|TP|PP|C WG KG/S-M2 Gas mass flux

O|TP|PP|C WGR SM3/SM3 Ratio between water (including water in gas phase) and dry gas (with water vapour).

O|TP|PP|C WL KG/S-M2 Liquid mass flux O|TP|PP|C WLHL KG/S-M2 Mass flux of oil in film



O|TP|PP|C WLWT KG/S-M2 Mass flux of water in film O|TP|PP|C WTOT KG/S-M2 Total mass flux

O|TP|PP|C YBOU M Vertical distance from branch inlet boundary to section boundary

O|TP|PP|C ZZBOU M Distance along the pipeline from branch inlet boundary to section boundary

Link to: Boundary Variables Description Variables



Olga Erosional Velocity

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