Explore topic-wise MCQs in Computational Fluid Dynamics.

This section includes 7 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.

( frac{ partial( rho hat{u})}{ partial t}+ nabla.( rho vec{V} hat{u}) = - nabla. dot{q_s}-p nabla. vec{V}- tau: nabla vec{V}+ dot{q_v} ). This form of the energy equation is applicable to _________

A. Both Newtonian and non-Newtonian fluids
B. Newtonian fluids
C. Non-Newtonian fluids
D. Pseudo-plastics
Answer» B. Newtonian fluids
Discussion
2.

Let ( hat{u} ) be the specific internal energy of a system moving along with the flow with a velocity ( vec{V} ). What is the time rate of change of the total energy of the system per unit mass?

A. ( hat{u}+ frac{1}{2} vec{V}. vec{V} )
B. ( frac{D}{Dt}( hat{u}+ frac{1}{2} vec{V}. vec{V}) )
C. ( frac{ partial}{ partial t}( hat{u}+ frac{1}{2} vec{V}. vec{V}) )
D. ( frac{D}{Dt}( hat{u}+ vec{V}. vec{V}) )
Answer» C. ( frac{ partial}{ partial t}( hat{u}+ frac{1}{2} vec{V}. vec{V}) )
Discussion
3.

If ( vec{f} ) is the body force of an infinitesimally small element (volume dx dy dz and density ) moving along with the flow (velocity ( vec{V} )), Which term is the work done by the body force?

A. ( vec{f}. vec{V} )dx dy dz
B. ( rho vec{f}. vec{V} )
C. ( rho vec{f}. vec{V} )dx dy dz
D. ( rho vec{f} )dx dy dz
Answer» D. ( rho vec{f} )dx dy dz
Discussion
4.

The energy equation which is in terms of total energy can be changed to terms of internal energy using ___________

A. momentum equation
B. stress-strain relations
C. equations of state
D. continuity equation
Answer» B. stress-strain relations
Discussion
5.

The energy equation which is in terms of temperature can be changed to terms of internal energy using ___________

A. momentum equation
B. stress-strain relations
C. equations of state
D. continuity equation
Answer» D. continuity equation
Discussion
6.

If p and are the net pressure and net shear stress acting on an infinitesimally small element (volume dx dy dz) moving along with the flow (velocity ( vec{V} )), what is the net work done on the system?

A. ( rho ( nabla .(p vec{V} )+ nabla .( . vec{V})) )
B. (((p vec{V})+( tau. vec{V}))dx ,dy ,dz )
C. ( rho( nabla.(p vec{V})+ nabla.( tau. vec{V})) dx ,dy ,dz )
D. (( nabla .(p)+ nabla.( tau))dx ,dy ,dz )
Answer» D. (( nabla .(p)+ nabla.( tau))dx ,dy ,dz )
Discussion
7.

While converting the energy equation from one form to another, which of the following happens?

A. Either the left-hand side or the right-hand side of the equation changes
B. Both the left-hand side and the right-hand side of the equation change
C. The right-hand side of the equation changes
D. The left-hand side of the equation changes
Answer» C. The right-hand side of the equation changes
Discussion