luminarycloud.params.simulation.physics.fluid.spatial_discretization.convective_scheme_order

Classes

FirstOrder	First-order accuracy.
SecondOrder	Second-order accuracy.

Package Contents

class FirstOrder

First-order accuracy.

class SecondOrder

Second-order accuracy.

alpha_ld2: LcFloat = 0.0

Parameter in range [0,1], generally 0 is more robust and 1 more accurate, thus it should be used on high quality grids with gentle stretching. On uniform meshes 0 gives a 2nd order reconstruction, and 2/3 gives a 4th order reconstruction. With the value 1, 2nd order is also obtained on non uniform meshes.

geometry_fixes: luminarycloud.params.enum.GeometryFixes

Strategies to cope with problematic mesh regions (e.g. high skewness angles).

geometry_fixes_mitigations: LcFloat = 0.25

Magnitude of the geometrical fixes mitigations. Expected value within [0,1]. The higher this value, the more numerical dissipation is added at control volumes with low-quality topological properties.

limiter: luminarycloud.params.enum.Limiter

Apply a slope limiter for second-order upwind schemes. This tends to increase robustness at the expense of solution time and higher dissipation in regions of the flow with sharp gradients. For this reason, it may be helpful to increase gradient blending parameters when using limiters.

limiter_kappa: LcFloat = 0.1

Parameter defining smooth flow regions where the limiter is disabled, and also where less robust dissipation is applied (if enabled). Higher values reduce limiting and/or dissipation.

order_blend: LcFloat = 1.0

Blend factor in [0,1] between a first-order and second-order convective scheme. A value of 0 results in a first-order scheme, and a value of 1.0 results in a second-order scheme. 1.0 by default. A value less than 1.0 may improve robustness at the cost of accuracy compared to a pure second-order scheme.

robust_dissipation: luminarycloud.params.enum.RobustDissipation

Use a form of dissipation that improves robustness but that may reduce accuracy.

umuscl_chi: LcFloat = 0.0

Chi parameter of the U-MUSCL variable extrapolation scheme in (-1,1).