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Table 1 Weights of the selected spatial finite difference stencils

From: Numerical anisotropy in finite differencing

Stencil \(\boldsymbol {\alpha_{1}}\) \(\boldsymbol {\alpha_{2}}\) \(\boldsymbol {a_{1}}\) \(\boldsymbol {a_{2}}\) \(\boldsymbol {a_{3}}\)
E2 0 0 1/2 0 0
E4 0 0 2/3 −1/12 0
E6 0 0 3/4 −3/20 1/60
DRP 0 0 0.770882380 −0.166705904 0.020843142
C4 1/4 0 3/4 0 0
Haras 0.3534620 0 1.5669657/2 0.13995831/4 0
Lui 0.5381301 0.0666331 1.36757772/2 0.823428170/4 0.0185207834/6
Lele 0.5771439 0.0896406 1.3025166/2 0.99355/4 0.03750245/6