The absolute residual is calculated __________(a) to overcome high values of residuals(b) to decelerate the convergence process(c) to overcome the sign problems in the actual residual value(d) to increase the rate of convergenceThis question was posed to me in an interview for job.This is a very interesting question from Relaxation in section Discretization of the Source Term & Relaxation of Computational Fluid Dynamics

The absolute residual is calculated __________(a) to overcome high val

1.	The absolute residual is calculated __________(a) to overcome high values of residuals(b) to decelerate the convergence process(c) to overcome the sign problems in the actual residual value(d) to increase the rate of convergenceThis question was posed to me in an interview for job.This is a very interesting question from Relaxation in section Discretization of the Source Term & Relaxation of Computational Fluid Dynamics
Answer» RIGHT choice is (c) to overcome the sign problems in the actual residual value For explanation: The residual may be a positive or a negative QUANTITY. As the sign is not needed, the ABSOLUTE value of the residual is found. If the absolute residual decreases with ITERATIONS, the solution CONVERGES.

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