Explore topic-wise MCQs in Computational Fluid Dynamics.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Computational Fluid Dynamics knowledge and support exam preparation. Choose a topic below to get started.

1.

The formula to find from the k-value obtained using the turbulence intensity is ____________

A. = ( frac{k^{3/2}}{l^2} )
B. = ( frac{k^{3/2}}{l} )
C. = ( frac{k^{1/2}}{l^2} )
D. = ( frac{k^{1/2}}{l} )
Answer» E.
Discussion
2.

The range of values of the turbulent kinetic energy is ___________

A. 50 to 75%
B. 11 to 20%
C. 1 to 10%
D. 0 to 1%
Answer» D. 0 to 1%
Discussion
3.

The relationship between the turbulence intensity Ti and the turbulence kinetic energy k is given by ___________

A. k= ( frac{1}{2}T_i( vec{v}. vec{v}) )
B. k= ( frac{1}{2}T_i^2( vec{v}. vec{v}) )
C. k= ( frac{1}{2}T_i^2( vec{v}. vec{v}) )
D. k= ( frac{1}{2T_i}( vec{v}. vec{v}) )
Answer» C. k= ( frac{1}{2}T_i^2( vec{v}. vec{v}) )
Discussion
4.

Which of these equations give the turbulence intensity?

A. ( frac{ sqrt{ overline{ vec{V}^{ }. vec{V}^{ }}}}{ sqrt{ vec{V}. vec{V}}} )
B. ( frac{ sqrt{ vec{V}. vec{V}}}{ sqrt{ overline{ vec{V}^{ }. vec{V}^{ }}}} )
C. ( frac{ sqrt{ overline{ vec{V}^{ }}}}{ sqrt{ vec{V}}} )
D. ( frac{ sqrt{ vec{V}}}{ sqrt{ overline{ vec{V}^{ }}}} )
Answer» B. ( frac{ sqrt{ vec{V}. vec{V}}}{ sqrt{ overline{ vec{V}^{ }. vec{V}^{ }}}} )
Discussion
5.

Which of these is correct about the first internal node of a k- model?

A. k-equation is not solved
B. -equation is not solved
C. Both k and -equations are not solved
D. Both k and -equations are solved simultaneously
Answer» C. Both k and -equations are not solved
Discussion
6.

When k and values are not available, for inlet boundary conditions, they are ____________

A. obtained from turbulence intensity
B. assumed to be zero
C. assumed to be unity
D. obtained from Reynolds number
Answer» B. assumed to be zero
Discussion
7.

In the low Reynolds number turbulence models, the first internal grid point is placed in the ___________

A. log-law layer
B. buffer layer
C. inertial sub-layer
D. viscous sub-layer
Answer» E.
Discussion
8.

Which of these values vanish near the wall boundary?

A. Velocity and turbulent viscosity
B. Velocity and Reynolds number
C. Velocity and k-value
D. k-value and Reynolds number
Answer» D. k-value and Reynolds number
Discussion
9.

Boundary conditions near the solid-walls for a k- model depends on ___________

A. Eddy viscosity
B. Reynolds number
C. -value
D. k-value
Answer» C. -value
Discussion
10.

If n is the spatial coordinate, in the outlet or symmetry boundaries, which of these following is correct for a k- model?

A. ( frac{ partial k}{ partial n}=0; frac{ partial varepsilon}{ partial n}=0 )
B. ( frac{ partial^2 k}{ partial n^2}=0; frac{ partial varepsilon}{ partial n}=0 )
C. ( frac{ partial k}{ partial n}=0; frac{ partial^2 varepsilon}{ partial n^2}=0 )
D. ( frac{ partial ^2 k}{ partial n^2}=0; frac{ partial^2 varepsilon}{ partial n^2}=0 )
Answer» B. ( frac{ partial^2 k}{ partial n^2}=0; frac{ partial varepsilon}{ partial n}=0 )
Discussion