SSA, a staggered semi-analytic integrator, tracks dust under linear gas drag with 2nd-order accuracy in the non-stiff regime and near-exact terminal velocity behavior in the stiff regime, allowing time steps up to 10^4 Ω0^-1 in disk tests.
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A Staggered Semi-Analytic Method for Simulating Dust Grains Subject to Gas Drag
SSA, a staggered semi-analytic integrator, tracks dust under linear gas drag with 2nd-order accuracy in the non-stiff regime and near-exact terminal velocity behavior in the stiff regime, allowing time steps up to 10^4 Ω0^-1 in disk tests.