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Pages: 2

Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
B.Tech S7 (S) Examination Sept 2020

Course Code: AO401
Course Name: COMPUTATIONAL FLUID DYNAMICS

PARTA
Answer any three full questions, each carries 10 marks.

Can we use CFD as research tool? Justify your answer with example.

Derive the differential Governing equation for fluid motion according to
Newton’s second law in conservation form.

Discuss on source panel method, list its merits and de-merits.

Derive an expression for shape function 3 noded bar element

Show that the second order wave equation is hyperbolic.

fu au

902 ax?

Classify the following system of PDE’s according to eigen value method

0
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१० _ du
ax 3

where, u and ए are the two dependent variables

Write a short note on well-posed problems.

Consider a viscous flow of air over a flat plate. At a given station in the flow
direction the variation of the flow direction u in the direction perpendicular to
the plate is given by an expression u=1582 (1-८९ 7.) where L is the characteristic
length 1൩. The viscosity coefficient of air is (1.775 x 10’ N/m-s). Assume u at
discrete grid points equally spaced in the y direction with Ay=0.1m. Calculate
the wall shear stress first, second and third order accuracy.

PART B
Answer any three full questions, each carries 10 marks.

Consider 1-8 wave equation U; + a Ux = 0. Discretize the equation and hence

deduce dissipative term and dispersive term.

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Duration: 3 Hours

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