Computational Fluid Dynamics Under Relaxation Online Exam Quiz
Computational Fluid Dynamics Under Relaxation GK Quiz. Question and Answers related to Computational Fluid Dynamics Under Relaxation. MCQ (Multiple Choice Questions with answers about Computational Fluid Dynamics Under Relaxation
Relaxation techniques are used to ensure __________
Options
A : convergence
B : stability
C : accuracy
D : boundedness
What is the relation between the E of the E-factor relaxation and the relaxation factor ??
Options
A : E=frac{1}{1-lambda}
B : E=frac{lambda}{1-lambda}
C : E=frac{lambda}{1+lambda}
D : E=frac{1}{1+lambda}
Which of these relaxation techniques is used in the SIMPLE algorithm?
Options
A : Explicit over-relaxation
B : Implicit over-relaxation
C : Explicit under-relaxation
D : Implicit under-relaxation
When the relaxation factor is less than one, which of these will occur?
Options
A : Increase the speed of convergence
B : Slow down the speed of convergence
C : Decrease the stability
D : Increase the divergence
There is no relaxation when the relaxation factor is __________
Options
A : positive infinity
B : negative infinity
C : one
D : zero
What is the disadvantage of over-relaxation?
Options
A : Stability is decreased
B : Divergence is increased
C : Oscillations are increased
D : Convergence is increased
The explicit under-relaxation method means that __________
Options
A : the changes are made before each iteration
B : the changes are made before the iteration process
C : the changes are made after the iteration process
D : the changes are made after each iteration
The time-step advancement of the E-factor relaxation is dependent on ___________
Options
A : the convergence
B : the stability
C : the accuracy
D : the cell volume
Which of these statements about the Patankar’s under-relaxation is true?
Options
A : The value form the previous iteration is modified
B : The diagonal coefficients are modified
C : The whole equation is modified
D : The neighbouring coefficient is modified
The relaxation techniques slow down the __________
Options
A : whole iterative process
B : effect of the sources
C : effect of the neighbouring elements and the source terms
D : effect of the neighbouring elements
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