Grid Points - Computing and Numerical Methods - Exam, Exams of Mathematical Methods for Numerical Analysis and Optimization

Main points of this exam paper are: Grid Points, Temperature Distributiona, Gauss-Seidel Method Suffices, Boundary Conditions, Finite Difference, Multi Step Methods

Typology: Exams

2012/2013

Uploaded on 04/13/2013

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CORK INSTITUTE OF TECHNOLOGY
INSTITIÚID TEICNEOLAÍOCHTA CHORCAÍ
Autumn Examinations 2008/09
Module Title: Computing and Numerical Methods II CA
Module Code: MATH 7016
School: Mechanical & Process Engineering
Programme Title: Bachelor of Engineering (Hons) in Mechanical Engineering – Stage 2
Programme Code: EMECH_8_Y2
External Examiner(s): Dr P Robinson
Internal Examiner(s): Dr R Sheehy
Instructions: Answer ALL questions.
Duration: 2 Hours
Sitting: Autumn 2009
Requirements for this examination:
Note to Candidates: Please check the Programme Title and the Module Title to ensure that you have received the
correct examination paper.
If in doubt please contact an Invigilator.
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CORK INSTITUTE OF TECHNOLOGY

INSTITIÚID TEICNEOLAÍOCHTA CHORCAÍ

Autumn Examinations 2008/

Module Title: Computing and Numerical Methods II CA

Module Code: MATH 7016

School: Mechanical & Process Engineering

Programme Title: Bachelor of Engineering (Hons) in Mechanical Engineering – Stage 2

Programme Code: EMECH_8_Y

External Examiner(s): Dr P Robinson Internal Examiner(s): Dr R Sheehy

Instructions: Answer ALL questions.

Duration: 2 Hours

Sitting: Autumn 2009

Requirements for this examination:

Note to Candidates: Please check the Programme Title and the Module Title to ensure that you have received the correct examination paper. If in doubt please contact an Invigilator.

  1. (a) Obtain the temperature distributiona at 1cm grid points of a (4 x 4)cm square plate bounded by the lines x = ±2,y=± 2. Laplaces Equation: (^) XT YT 2 0

2 2

2 ∂∂ +∂∂ =

holds for all interior points and the boundary conditions are: T = -80 on the line y = 2 T = -40y on the lines x = ± 2 T = 240 + 80x for -2 ≤ x ≤0 on the line y = - T = 240 – 80x for 0 ≤ x ≤2 on the line y = - Find the temperatures at 9 interior grid points. (One iteration of Gauss-Seidel Method suffices). Use a suitable relaxation factor.

(b) Calculate the flux at any interior grid point. Plate aluminium k = 49.

  1. (a) Illustrate using a suitable example both an Initial Vale and Boundary Value Problem. Use the Shooting Method to solve the 1D steady state heat equation.

dxd^ T^2 h'^ (T^ a-T)^0

2

  • = For a rod of length 10m width: h’ = .01 m- Ta = 20 and boundary conditions: T(0) = 40 T (10) = 200.

(b) Use a Finite Difference Method with 4 interior nodes to solve the same problem as Part (a).