Related InterviewSolutions

• When the residuals are scaled, the vanishing value is ___________(a) less than 10(b) less than 10(c) more than 10^-5(d) less than 10^-5The question was posed to me in an online interview.This is a very interesting question from Relaxation in division Discretization of the Source Term & Relaxation of Computational Fluid Dynamics
• Which of these statements states the need for the normalization of the residual?(a) Different variables result in different level of residuals(b) Different variables result in the same level of residuals(c) Different variables result in different residuals(d) Different variables result in same residualsThis question was posed to me at a job interview.Origin of the question is Relaxation topic in portion Discretization of the Source Term & Relaxation of Computational Fluid Dynamics
• When the source term does not vary much, the source term is ___________(a) implicitly calculated(b) calculated from the previous iteration’s values(c) solved simultaneously(d) calculated form the current valuesI have been asked this question in a national level competition.I need to ask this question from Source Term Discretization topic in chapter Discretization of the Source Term & Relaxation of Computational Fluid Dynamics
• Which of these is the denominator while finding the root mean square residual?(a) Sum of the absolute residuals(b) Sum of the actual residuals(c) Number of elements(d) Sum of the scaled residualsThis question was addressed to me in quiz.My question comes from Relaxation in section Discretization of the Source Term & Relaxation of Computational Fluid Dynamics
• When the field of the flow variable is exact, the residual will be __________(a) negative(b) positive(c) zero(d) oneThis question was posed to me in quiz.The origin of the question is Relaxation topic in section Discretization of the Source Term & Relaxation of Computational Fluid Dynamics
• Which of these values is used to find the normalized residual?(a) The minimum of all the residuals(b) The maximum of all the residuals(c) The sum of all the residuals(d) The product of all the residualsThe question was asked at a job interview.Question is taken from Relaxation topic in division Discretization of the Source Term & Relaxation of Computational Fluid Dynamics
• The standard form of the equations is solved for __________ and the residual form is solved for _________(a) flow variables, residuals(b) flow variables, corrections(c) corrections, flow variables(d) residuals, flow variablesThis question was posed to me in final exam.This key question is from Relaxation in portion Discretization of the Source Term & Relaxation of Computational Fluid Dynamics
• Which of these transport phenomena do not involve any source term?(a) Heat conduction(b) Heat radiation(c) Turbulence models(d) Chemical reactionsThis question was addressed to me in final exam.The question is from Source Term Discretization in portion Discretization of the Source Term & Relaxation of Computational Fluid Dynamics
• The time-step advancement of the E-factor relaxation is dependent on ___________(a) the convergence(b) the stability(c) the accuracy(d) the cell volumeThis question was addressed to me in exam.The origin of the question is Under-Relaxation in chapter Discretization of the Source Term & Relaxation of Computational Fluid Dynamics
• Relaxation techniques are used to ensure __________(a) convergence(b) stability(c) accuracy(d) boundednessThe question was asked in exam.This question is from Under-Relaxation in division Discretization of the Source Term & Relaxation of Computational Fluid Dynamics