Computational Fluid Dynamics Mid - I, September - 2014

1.Computational Fluid Dynamics in the philosophical study and development of fluid dynamics Discipline is
  • First Approach
  • Second Approach
  • Third Approach
  • Fourth Approach
Answer: C
2.Computational Fluid Dynamics is used to solve
  • Linear equations
  • Non Linear equations
  • Boundary value problems
  • All of the above
Answer: D
3.In direct methods for matrix inversion, sequence of row manipulations is called _____Converts the matrix to an upper triangular form
  • Forward elimination
  • Forward substitution
  • Backward elimination
  • Backward substation
Answer: B
4.The FDM is ___________
  • Finite Difference Method
  • Finite Different Mechanics
  • Finite Definition Method
  • None of the above.
Answer: A
5.Which of the following is the iterative method to solve system of linear equations
  • LU Decomposition
  • Matrix Inversion
  • Gauss Method
  • Thomas Algorithm.
Answer: C
6.A system with more equations than unknowns has
  • Unique solutions
  • Infinitely many solutions
  • No solution
  • none of the above
Answer: C
7.As the mesh or time step decreases the discretization error _____________
  • Decreases
  • Increases
  • Remains Same
  • None of the above
Answer: A
8.Gauss-Siedel method falls into___________method
  • Direct
  • Iterative
  • Both
  • None of the above.
Answer: B
9.Fourier’s Law for Heat transfer by Conduction can be used to describe q as
  • q = −KΔT
  • q=K/ΔT
  • q=ΔT/K
  • None of the above
Answer: A
10.Von-Neumann stability analysis gives
  • Instability
  • Numerical solutions
  • Stability
  • Error
Answer: C
11.Discretization of the Integral form of equation is called__________ method.
Answer: Finite Volume
12.Finite difference representations of derivatives are derived from ___________ series.
Answer: Taylor’s
13.The Algorithm used to solve the tri diagonal matrix is called ___________.
Answer: Thomas Algorithm
14._________method is used to solve system of linear equations.
Answer: LU Decomposition
15.The unknown values in Finite difference method is calculated at____________.
Answer: Nodes
16.The difference between the exact analytical solution of partial differential equation and Exact solution of the corresponding finite difference equation is called___________.
Answer: Discretization
17.Convert (10)10 in binary form is ____________
Answer: (1100)2 
18.Crank-Nicolson scheme is also called as__________
Answer: Semi-Implicit method
19.Heat transfer due to convection is described by Newton‘s Law of Cooling is given by _______________.
Answer: QConvection = h*A*dT
20.The nature of viscous flow can be characterised by a non dimensional parameter Called__________ Number.
Answer: Reynolds