Large turbulent eddies extract energy from the mean flow by this process.(a) Energy decomposition(b) Eddy extracting(c) Vortex stretching(d) Substantial variationI got this question in an online interview.My question is based upon Turbulence Modelling topic in chapter Turbulence Modelling of Computational Fluid Dynamics

Large turbulent eddies extract energy from the mean flow by this proce

1.	Large turbulent eddies extract energy from the mean flow by this process.(a) Energy decomposition(b) Eddy extracting(c) Vortex stretching(d) Substantial variationI got this question in an online interview.My question is based upon Turbulence Modelling topic in chapter Turbulence Modelling of Computational Fluid Dynamics
Answer» Right choice is (c) Vortex stretching The BEST I can explain: Vortex stretching is the lengthening of vortices with a corresponding increase in the component of VORTICITY in the stretching direction. This vortex stretching is RESPONSIBLE for the LARGEST turbulent eddies to interact with the mean flow and extract energy from them.

Discussion

No Comment Found

Related InterviewSolutions

The Smagorinsky-Lilly SGS model is ___________(a) Dissipative(b) Convective(c) Diffusive(d) Convective and diffusiveI have been asked this question in an interview.My question comes from Turbulence Modelling in section Turbulence Modelling of Computational Fluid Dynamics
How many extra stress terms occur due to the LES filtering operation?(a) No extra terms(b) Four terms(c) Three terms(d) Two termsI had been asked this question during an interview.I want to ask this question from Turbulence Modelling in chapter Turbulence Modelling of Computational Fluid Dynamics
When compared to the standard ε-equation, the transformed ω-equation has _________(a) the same number of terms(b) an extra dissipation term(c) two extra source terms(d) an extra source termThe question was posed to me in an interview.I'd like to ask this question from Turbulence Modelling topic in section Turbulence Modelling of Computational Fluid Dynamics
The term representing the effect of small-scale eddies in diffusion terms of the k transport equation and ε transport equations take the values ___________ and ____________(a) 1.49, 1.49(b) 1.39, 1.39(c) 1.39, 1.49(d) 1.49, 1.39This question was addressed to me in an international level competition.I'd like to ask this question from Turbulence Modelling in chapter Turbulence Modelling of Computational Fluid Dynamics
The governing equations which are averaged using these methods of averaging are used in _____________(a) DNS model(b) SST model(c) RANS model(d) k-ε modelThis question was addressed to me during an interview for a job.This interesting question is from Turbulence Modelling in portion Turbulence Modelling of Computational Fluid Dynamics
For unsteady turbulent flows, which of these averaging method is used?(a) Time averaging(b) Ensemble averaging(c) Spatial averaging(d) Volume averagingI got this question during an online interview.This key question is from Turbulence Modelling topic in chapter Turbulence Modelling of Computational Fluid Dynamics
The k-ε model focuses on the mechanism which affects ____________(a) the Reynolds stresses(b) the cross stresses(c) the transport of scalar fluxes(d) the turbulent kinetic energyI have been asked this question in an interview for internship.This is a very interesting question from Turbulence Modelling topic in portion Turbulence Modelling of Computational Fluid Dynamics
The cut-off width dependent on the finite volume grid size is equal to _____________(a) the square of the grid cell volume(b) the cube of the grid cell volume(c) the square root of the grid cell volume(d) the cube root of the grid cell volumeI got this question in examination.My doubt is from Large Eddy Simulation for Turbulent Models in portion Turbulence Modelling of Computational Fluid Dynamics
In high Reynolds number turbulent flows _______________ terms dominate.(a) diffusion terms(b) convection terms(c) viscous stress terms(d) turbulent effect termsI have been asked this question during an internship interview.My question is based upon Turbulence Modelling in division Turbulence Modelling of Computational Fluid Dynamics
The terms accounting for turbulence effects contain ____________(a) Reynolds stresses(b) Turbulent kinetic energy(c) Dissipation of turbulent kinetic energy(d) Length scale termsI got this question during an interview.This is a very interesting question from Turbulence Modelling topic in division Turbulence Modelling of Computational Fluid Dynamics

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment