Space discretization scheme is limitedLinear, which is central scheme of second order accuracy. There are 55 default OpenFOAM schemes to select:
CoBlended
Gamma
Gamma01
LUST
MUSCL
MUSCL01
Minmod
OSPRE
QUICK
SFCD
SuperBee
UMIST
biLinearFit
blended
clippedLinear
cubic
cubicUpwindFit
downwind
filteredLinear
filteredLinear2
filteredLinear3
fixedBlended
harmonic
limitWith
limitedCubic
limitedCubic01
limitedGamma
limitedLimitedCubic
limitedLimitedLinear
limitedLinear
limitedLinear01
limitedMUSCL
limitedVanLeer
limiterBlended
linear
linearFit
linearPureUpwindFit
linearUpwind
localBlended
localMax
localMin
midPoint
outletStabilised
pointLinear
quadraticFit
quadraticLinearFit
quadraticLinearUpwindFit
quadraticUpwindFit
reverseLinear
skewCorrected
upwind
vanAlbada
vanLeer
vanLeer01
weighted