Which of these statements is correct about the pressure correction equation?(a) An over-relaxation factor is used to avoid divergence(b) An under-relaxation factor is used to avoid divergence(c) An under-relaxation factor is used to avoid undershoots(d) An over-relaxation factor is used to avoid undershootsThe question was asked by my school principal while I was bunking the class.The query is from Incompressible Flows in chapter Incompressible Flows & Compressible Flows of Computational Fluid Dynamics

Which of these statements is correct about the pressure correction equ

1.	Which of these statements is correct about the pressure correction equation?(a) An over-relaxation factor is used to avoid divergence(b) An under-relaxation factor is used to avoid divergence(c) An under-relaxation factor is used to avoid undershoots(d) An over-relaxation factor is used to avoid undershootsThe question was asked by my school principal while I was bunking the class.The query is from Incompressible Flows in chapter Incompressible Flows & Compressible Flows of Computational Fluid Dynamics
Answer» The CORRECT answer is (B) An under-relaxation factor is USED to avoid divergence Easiest explanation: The pressure correction equation may DIVERGE if an under-relaxation factor is not used. So, an under-relaxation factor is used with the correction term which is added to the guessed term to get the correct value.

Discussion

No Comment Found

Related InterviewSolutions

In which of these steps are the pressure-correction equations obtained in the PISO algorithm?(a) The first predictor step(b) The first corrector step(c) The second predictor step(d) The second corrector stepI have been asked this question at a job interview.This interesting question is from Incompressible Flows topic in portion Incompressible Flows & Compressible Flows of Computational Fluid Dynamics
Which of these procedures is done in the predictor step of the discretized momentum equation?(a) Initial guess for velocity and the first corrected pressure are obtained(b) First corrected values of pressure and velocity are obtained(c) Initial guesses for pressure and velocity are obtained(d) Initial guess for pressure and the first corrected velocity are obtainedThis question was posed to me in quiz.My question comes from Incompressible Flows topic in portion Incompressible Flows & Compressible Flows of Computational Fluid Dynamics
Which of these terms is extra while using the Rhie-Chow interpolation?(a) Diffusion term(b) Dissipative term(c) Advection term(d) Source termI had been asked this question in a job interview.I would like to ask this question from Incompressible Flows topic in portion Incompressible Flows & Compressible Flows of Computational Fluid Dynamics
Which of these statements is true for an incompressible flow?(a) Absolute mass flux is not important(b) Absolute density is not important(c) Absolute temperature is not important(d) Absolute pressure is not importantI have been asked this question during an internship interview.The question is from Incompressible Flows in section Incompressible Flows & Compressible Flows of Computational Fluid Dynamics
Which of these statements is correct?(a) Body force term in the momentum equation is non-linear(b) Rate of change term in the momentum equation is non-linear(c) Convective term in the momentum equation is linear(d) Convective term in the momentum equation is non-linearThe question was asked in an interview for job.My question comes from Incompressible Flows in division Incompressible Flows & Compressible Flows of Computational Fluid Dynamics
What is the advantage of the SIMPLEC algorithm over the SIMPLER algorithm?(a) No extra equations(b) No extra terms(c) No momentum equation(d) More stableThis question was posed to me during an interview.I need to ask this question from Incompressible Flows in section Incompressible Flows & Compressible Flows of Computational Fluid Dynamics
Which of these differences occur in the momentum equation of the compressible flows when compared to that of the incompressible flows?(a) Temperature term(b) Source term(c) Bulk viscosity(d) Bulk modulusThis question was addressed to me in semester exam.My question is based upon Compressible Flows topic in chapter Incompressible Flows & Compressible Flows of Computational Fluid Dynamics
The SIMPLE algorithm is a ____________(a) Weighted average method(b) Predictor-corrector method(c) Euler method(d) Heun’s methodThis question was addressed to me by my school principal while I was bunking the class.My doubt stems from Incompressible Flows topic in portion Incompressible Flows & Compressible Flows of Computational Fluid Dynamics
The explicit method is preferred when __________(a) an accurate velocity field is needed(b) the pressure value is needed(c) an accurate time history of the flow is needed(d) only less memory is availableThis question was addressed to me by my college director while I was bunking the class.My question is based upon Incompressible Flows topic in chapter Incompressible Flows & Compressible Flows of Computational Fluid Dynamics
An equation for the conservation of kinetic energy can be obtained by ___________(a) the product of momentum equations and mass(b) the product of momentum equations and velocities(c) the product of continuity equations and velocities(d) the product of continuity equations and massI have been asked this question in an interview for internship.My query is from Incompressible Flows topic in section Incompressible Flows & Compressible Flows of Computational Fluid Dynamics

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment