TY - JOUR T1 - Unconditional Stability of a Crank-Nicolson Adams-Bashforth 2 Numerical Method. JO - International Journal of Numerical Analysis Modeling Series B VL - 3 SP - 171 EP - 187 PY - 2014 DA - 2014/05 SN - 5 DO - http://doi.org/ UR - https://global-sci.org/intro/article_detail/ijnamb/229.html KW - convection-diffusion equations KW - unconditional stability KW - IMEX methods KW - Crank-Nicolson KW - Adams-Bashforth 2 AB - Nonlinear partial differential equations modeling turbulentv fluid flow and similar processes present special challanges in numerical analysis. Regions of stability of implicit-explicit methods are reviewed, and an energy norm based on Dahlquist's concept of G-stability is developed. Using this norm, a time-stepping Crank-Nicolson Adams-Bashforth 2 implicit-explicit method for solving spatially-discretized convection-diffusion equations of this type is analyzed and shown to be unconditionally stable.