A large relaxation factor will lead to ____________(a) large and oscillatory iteration steps(b) large and stable iteration steps(c) small and oscillatory iteration steps(d) small and stable iteration stepsThe question was asked by my school principal while I was bunking the class.My enquiry is from Incompressible Flows topic in section Incompressible Flows & Compressible Flows of Computational Fluid Dynamics

A large relaxation factor will lead to ____________(a) large and oscil

1.	A large relaxation factor will lead to ____________(a) large and oscillatory iteration steps(b) large and stable iteration steps(c) small and oscillatory iteration steps(d) small and stable iteration stepsThe question was asked by my school principal while I was bunking the class.My enquiry is from Incompressible Flows topic in section Incompressible Flows & Compressible Flows of Computational Fluid Dynamics
Answer» The correct OPTION is (a) large and oscillatory ITERATION steps Easy explanation: The under-relaxation FACTOR should be large enough to MOVE the iteration steps FORWARD at a fast rate. But, if it is too large, the iteration steps will be unstable and oscillatory or even divergent at times.

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