APM inputDict Definition

This is a list of all the variables in the tutorial APM template. Check out this page for more details on the units.

areaTable

In case pressure build up is solved for, the area table is to be given as an input

beta

Swashplate Angle

Unit: deg

betaMax

Maximum swashplate angle

Unit: deg

blockDensity

Block density

Unit: kg/m ³

blockDirichletSet

Block dirichlet boundary sets

Unit: -

blockDirichletTemp

Block dirichlet boundary temperatures

Unit: degC

blockElementSet

Block volume sets and associated material properties

Unit: -

blockFactor

Block factor

Unit: -

blockFilmFrictionCoefficient

Block film asperity friction coefficient

Unit: -

blockIMDir

Block influence Matrix directory

blockIxx

Block Ixx at crowning point

Unit: kg*m ²

blockIyy

Block Iyy at crowning point

Unit: kg*m ²

blockIzz

Block Izz at crowning point

Unit: kg*m ²

blockMass

Block mass

Unit: kg

blockMesh

Block thermal mesh file

blockMixedCoeff

Block mixed boundary fluxes

Unit: W/m ² /K

blockMixedSet

Block mixed boundary sets

Unit: -

blockMixedTemp

Block mixed boundary temperature

Unit: degC

blockNeumannFlux

Block neumann boundary fluxes

Unit: W/m ²

blockNeumannSet

Block neumann boundary sets

Unit: -

blockSetConductivity

Corresponding thermal conductivities

Unit: W/m/K

blockSetDensity

Corresponding densities

Unit: kg/m ³

blockSetElasticMod

Corresponding young’s moduli

Unit: GPa_a

blockSetExpansionCoeff

Corresponding thermal expansion coefficients

Unit: -

blockSetPoisson

Corresponding poisson’s ratios

Unit: -

blockSTL

Block STL for printing bodies

chmbrAPoly

Polygon file for outlet chamber

chmbrBPoly

Polygon file for inlet chamber

dBore

Diameter of bushing

Unit: mm

dcPoly

Polygon file for displacement chamber

degPrint

Print interval in degrees

Unit: deg

degStartRelaxBody

What shaft angle to start applying relaxation on body motion

Unit: deg

degStopRelaxBody

What shaft angle to start applying relaxation on body motion

Unit: deg

dInBlock

Inner radius of block running surface (vp film)

Unit: mm

dInSlipper

Slipper inner radius

Unit: mm

dOutBlock

Inner radius of block running surface (vp film)

Unit: mm

dOutSlipper

Slipper outer radius

Unit: mm

dPiston

Diameter of piston

Unit: mm

dPitch

Pitch radius

Unit: mm

dySpRot

Y offset of the swashplate rotation center at zero displacement

Unit: mm

dzBlockCG

Z offset from ideal crowning point point to block CG

Unit: mm

dzBlockRun

Z distance between origin and block/valveplate running surface at zero displacement

Unit: mm

dzBoreRunSurf

Bushing running surface center on block from ref(positive sense from vp to sp) ref - Origin

Unit: mm

dzCrown

Z distance between origin and shaft reaction point on block at zero displacement

Unit: mm

dzPistonCG

Z offset from ball center to piston CG

Unit: mm

dzPistonFlatBall

Piston flat end from ball head

Unit: mm

dzPistonRunSurf

Piston running surface center from ball head(positive sense from vp to sp)

Unit: mm

dzSlipCG

Z offset from socket center to slipper CG

Unit: mm

dzSlipRun

Slipper running surface from socket center

Unit: mm

dzSpRot

Z offset of the swashplate rotation center at zero displacement

Unit: mm

EBlock

Block Young’s modulus

Unit: GPa_a

EBushing

Bushing Young’s modulus

Unit: GPa_a

EPiston

Piston Young’s modulus

Unit: GPa_a

ESlipper

Slipper Young’s modulus

Unit: GPa_a

ESwashplate

Swashplate Young’s modulus

Unit: GPa_a

EVP

VP Young’s modulus

Unit: GPa_a

FilmMaxTimeStep

Maximum time step for a lubricating film (optional, user can keep blank and it will stick to default)

Unit: s

filmStepMaxGrowth

Maximum growth of film time steps

Unit: %

fluidPropSub

Location of sub atmospheric fluid property file

fluidPropSuper

Location of super atmospheric fluid property file

fluidType

Fluid properties type: 0 - Fluid Props Sub/Super with cavitation integrated in files 1 - Single fluid props super with cavitation specified 2 - User expression with cavitation specified

Unit: -

FSlipperHoldDown

Slipper Hold down force

Unit: N

FSpringBlock

Block Spring force

Unit: N

hBlock_casinginner

Block heat transfer coefficient to inner casing fluid

Unit: W/m ² /K

hBlock_casingouter

Block heat transfer coefficient to inner casing fluid

Unit: W/m ² /K

hBlock_dc

Block heat transfer coefficient to displacement chamber fluid

Unit: W/m ² /K

hBlock_groovebearing

Block heat transfer coefficient to inner casing fluid

Unit: W/m ² /K

hBlock_outerbearing

Block heat transfer coefficient to inner casing fluid

Unit: W/m ² /K

hInitBlockFilm

Initial film thickness on block Film

Unit: micron

hInitSlipperFilm

Initial film thickness on slipper Film

Unit: micron

hPiston_ball

Piston heat transfer coefficient to casing fluid through ball joint

Unit: W/m ² /K

hPiston_case

Piston heat transfer coefficient to casing fluid through casing surface

Unit: W/m ² /K

hPiston_dc

Piston heat transfer coefficient to displacement chamber fluid

Unit: W/m ² /K

hSlipper_case

Slipper heat transfer coefficient to casing fluid through casing surface

Unit: W/m ² /K

hSlipper_pocket

Slipper heat transfer coefficient to pocket fluid

Unit: W/m ² /K

hSlipper_socket

Slipper heat transfer coefficient to casing fluid through ball joint

Unit: W/m ² /K

hSP_casing

Swashplate heat transfer coefficient to casing

Unit: W/m ² /K

hVP_casing

Valveplate heat transfer coefficient to casing

Unit: W/m ² /K

hVP_hp

Valveplate heat transfer coefficient to outlet chamber in casing

Unit: W/m ² /K

hVP_lp

Valveplate heat transfer coefficient to inlet chamber in casing

Unit: W/m ² /K

hVP_outerbearing

Valveplate heat transfer coefficient to casing

Unit: W/m ² /K

impContr

Impedance contribution threshold

Unit: %

impContrHard

Impedance contribution hard threshold

Unit: %

impShrinkRate

Impedance shrink rate

Unit: -

IntegratorAbsTol

The following two correspond to convergence tolerance, evaluated as:: error_i<=tol_i=|y_i|*rTol + |y_char,i|*aTol

Absolute tolerance for the integrator

Unit: -

IntegratorMaxSteps

Maximum steps for the integrator (optional, user can keep blank and it will stick to default)

Unit: -

IntegratorMaxTimeStep

Maximum time step for the integrator (optional, user can keep blank and it will stick to default)

Unit: s

IntegratorRelTol

Relative tolerance for the integrator

Unit: -

isBlockFilm

Whether to solve for the cylinder block film

Unit: -

isBoreProfile

Whether to consider surface profile on bore

Unit: -

isDefBlockFilm

Whether to consider deformation in the block film 0 - no deformation, 1 - analytical micro deformation, 2 - influence matrix

Unit: -

isDefPistonFilm

Whether to consider deformation in the piston film 0 - no deformation, 1 - analytical micro deformation, 2 - influence matrix

Unit: -

isDefSlipperFilm

Whether to consider deformation in the slipper film

Unit: -

isEnergyEqFilms

Whether to solve energy equation in lubricating interfaces

Unit: -

isMixedLubBlockFilm

Whether to consider mixed lubrication in the block film

Unit: -

isMixedLubPistonFilm

Whether to consider mixed lubrication in the piston film

Unit: -

isMixedLubSlipperFilm

Whether to consider mixed lubrication in the slipper film

Unit: -

isPistonFilm

Whether to solve for piston film

Unit: -

isPistonProfile

Whether to consider surface profile on piston

Unit: -

isPrintBody

Flag notifying if bodies are to be printed

Unit: -

isSlipperFilm

Whether to solve for slipper film

Unit: -

isSlipperProfile

Whether to consider surface profile on slipper

Unit: -

isSolidHeatTransfer

Solid body heat transfer

Unit: -

isThermalDeformation

Solid body thermal deformation

Unit: -

lBoreRunSurf

Bushing running surface length

Unit: mm

lPistonRunSurf

Piston running surface length

Unit: mm

maxCFL

Maximum CFL for films

Unit: -

muPistonSocketDyn

Dynamic friction coefficient of the ball-socket joint

Unit: -

muPistonSocketStat

Static friction coefficient of the ball-socket joint

Unit: -

natFreqBlock

Natural frequency of block

Unit: Hz

natFreqPiston

Natural frequency of Piston

Unit: Hz

natFreqSlipper

Natural frequency of Slipper

Unit: Hz

natFreqSwashplate

Natural frequency of Swashplate

Unit: Hz

natFreqVP

Natural frequency of VP

Unit: Hz

nDegDefInit

Degree till which influence matrices are not applied

Unit: deg

nDegThermalCalc

Degrees at which solid temperature to be updated

Unit: deg

nDegThermalSample

Degree interval at which heat flux is to be sampled

Unit: deg

nPiston

Number of pistons

Unit: -

nPtsBlockFilm

Number of points on block film

Unit: -

nPtsPistonFilm

Number of points on piston film

Unit: -

nPtsSlipperFilm

Number of points on slipper film

Unit: -

nRev

Number of revolutions to run

Unit: -

nRevFluxRelax

Number of revolutions till which the heat flux from the interfaces are to be relaxed

Unit: -

nuBlock

Block Poisson’s ratio

Unit: -

nuBushing

Bushing Poisson’s ratio

Unit: -

nuPiston

Piston Poisson’s ratio

Unit: -

nuSlipper

Slipper Poisson’s ratio

Unit: -

nuSwashplate

Swashplate Poisson’s ratio

Unit: -

nuVP

VP Poisson’s ratio

Unit: -

omega

Shaft speed

Unit: rev/min

ompNthreads

Number of threads for parallel implementation

Unit: -

outputListFile

Location to write output availability table (if this entry doesn’t exist, no file written)

pA

+x port side pressure

Unit: bar

pB

-x port side pressure

Unit: bar

pCase

Case pressure

Unit: bar

percDampDefBlock