Averaging schemes for speedup and error assessment of coupled FV-MC codes

摘要: Averaging schemes for speedup and error assessment of coupled FV-MC codes Page 1 Averaging schemes for speedup and error assessment of coupled FV-MC codes K. Ghoos1, P. Boerner3, W. Dekeyser1, G. Samaey2, M. Baelmans1 1 KU Leuven, Department of Mechanical Engineering, Leuven, Belgium 2 KU Leuven, Department of Computer Science, Leuven, Belgium 3 FZ Juelich, Institute of Energy and Climate Research (IEK-4), Juelich, Germany Page 2 Convergence of coupled FV-MC codes? 2 Most plasma edge codes: fluid-kinetic code coupling eg Page 3 Numerical errors in coupled FV-MC systems 3 [K. Ghoos et al., JCP 322 (2016) 162] 𝜀 = 𝐴𝑑 ℎ𝑝 + 𝐴𝑠 𝑅𝑁 𝑃𝐼𝑎𝑣 + 𝐴𝑏𝑐 𝑅𝑁 𝑃 Different error contributions o Statistical error 𝜖s o Finite sampling bias 𝜖b o Convergence error 𝜖c o Discretization error 𝜖d Post-processing averaging improves accuracy Random noise procedure (RN) • Provides smallest …