Computational Fluid Dynamics Central Difference Schemes Online Exam Quiz
Computational Fluid Dynamics Central Difference Schemes GK Quiz. Question and Answers related to Computational Fluid Dynamics Central Difference Schemes. MCQ (Multiple Choice Questions with answers about Computational Fluid Dynamics Central Difference Schemes
What is the relationship between frac{phi_c-phi_w}{phi_E-phi_w} and the Peclet number (Pe) when the grid is uniform?
Options
A : frac{phi_c-phi_w}{phi_E-phi_w} = frac{1}{2}(1-frac{Pe}{2})
B : frac{phi_c-phi_w}{phi_E-phi_w} = frac{1}{2}(1+frac{Pe}{2})
C : frac{phi_c-phi_w}{phi_E-phi_w} = frac{1}{2}(frac{Pe}{2}-1)
D : frac{phi_c-phi_w}{phi_E-phi_w} = (frac{Pe}{4})
The central difference scheme gives unphysical results when the problem is _____________
Options
A : depends on the boundary conditions
B : equally dominated by diffusion and convection
C : diffusive dominant
D : convective dominant
The order of accuracy of the central differencing scheme is _____________
Options
A : fourth-order
B : third-order
C : second-order
D : first-order
What is the central differencing scheme similar to?
Options
A : Interpolation profile
B : Linear interpolation profile
C : Weighted average method
D : Geometric mean
The central differencing scheme becomes inconsistent when the Peclet number _____________
Options
A : is higher than 2
B : is less than 2
C : is higher than 5
D : is less than 5
The central difference approximation goes wrong when _____________
Options
A : Peclet number is negative
B : Peclet number is positive
C : Peclet number is low
D : Peclet number is high
The central differencing scheme gives good results when _____________
Options
A : the grid is coarse
B : the grid is very fine
C : the grid is Cartesian and uniform
D : the gird is on-Cartesian
Which of these is correct about the central differencing scheme?
Options
A : The importance of upwind and downwind nodes depends on the problem
B : It gives more importance to the downwind nodes
C : It gives equal importance to upwind and downwind nodes
D : It gives more importance to the upwind nodes
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