Question

For which kind of problems are the two-level methods used?

(a) Spatial integrations

(b) Spatial problems in ODEs

(c) Temporal initial value problems in ODEs

(d) Temporal initial value problems in integration

This question was posed to me in unit test.

Asked question is from Transient Flows in division Transient Flows of Computational Fluid Dynamics

Answer 1

Right answer is (c) Temporal initial value problems in ODEs

To elaborate: The two-level methods are used to discretize the ordinary differential equations which of the initial value types. They proceed using two steps in time starting from the available initial value.