Question

The predictor-corrector method is a combination of ______________

(a) midpoint and trapezoidal rules

(b) backward Euler method and Trapezoidal rule

(c) implicit and explicit methods

(d) forward and backward Euler methods

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I would like to ask this question from Transient Flows topic in section Transient Flows of Computational Fluid Dynamics

Answer 1

The correct option is (c) implicit and explicit methods

Easiest explanation: Explicit methods are very easy to program and they need less computational cost. But they are not stable. The implicit methods are unconditionally stable but more expensive and iterative. So, the positives of both of these methods are combined by the predictor-corrector method.