Minmod
Minmod is a nonlinear slope limiter used in numerical methods for hyperbolic conservation laws to suppress spurious oscillations near discontinuities while preserving monotonicity. It is a simple limiter that appears in high-resolution schemes such as MUSCL and TVD (total-variation-diminishing) formulations.
Mathematically, for real numbers a and b, the two-argument minmod is defined as minmod(a,b) = a if
In practice, minmod is used to limit the slope in the reconstruction of interface values in finite-volume
Related concepts include other slope limiters such as van Leer, Superbee, and the Monotonized Central (MC) limiter.
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