Download GTU BE/B.Tech 2018 Winter 4th Sem New 2140107 Computational Fluid Dynamics I Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-IV (NEW) EXAMINATION - WINTER 2018

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Subject Code: 2140107 Date: 01/12/2018
Subject Name: Computational Fluid Dynamics I
Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS

Q.1 (a) What are the needs for problem solving with CFD? 03
(b) What are the different fluid flow models? Brief them. 04

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Q.2 (a) Which are the models of fluid flow? 03
(b) Derive the expression for substantial derivative. 04
(c) Derive energy equation in nonconservation form. 07

OR

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(c) Derive generic form of governing equations. 07

Q.3 (a) Explain the need to discretize the domain. 03
(b) Differentiate FDM and FEM. 04
(c) Discuss Relaxation technique in detail. 07

OR

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Q.3 (a) Give a brief on FVM. 03
(b) Enlist the factors affecting the grid. 04
(c) Derive 1^st order derivatives of forward difference, backward difference and central difference schemes. 07

Q.4 (a) Explain the need of mathematical behavior of governing equations in the field of Aerodynamics. 03
(b) Discuss unstructured grid. 04

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OR

Q.4 (a) Discuss an implicit approach. 03
(b) Discuss an explicit approach. 04
(c) Discuss FVM for 1-D diffusion problem. 07

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Q.5 (a) What is grid transformation? Why is it required? 03
(b) Write a note on stretched grids. 04
(c) Write a note on relaxation technique. 07

OR

Q.5 (a) Explain the different boundary conditions applied to fluid flow domain. 03

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