MCE Assignment Brief 2016-17 Page 1 of 4 ASSIGNMENT SPECIFICATION Module title: Computational Fluid Dynamics and Heat Transfer Module code: EN0776 / KB7001 Assignment title: Assignment Part 1. Design and validation of a heat sink Module tutor name(s): Dr.Ulugbek Azimov Assessment set by: (if not the module tutor) Academic year: 2016 - 17 % Weighting (to overall module): This assignment is worth 32% of the module marks. Average study time required by student: 60 hours Date of hand out to students: Monday 17th of October, 2016 Mechanism to be used to disseminate to students: in lecture class, via eLP Date and time of submission by student: Friday 11th of November 2016 by 4pm Mechanism for submission of work by student: via Faculty Office, via elp Date by which work, feedback and marks will be returned to students: Thursday 8th December 2016 Mechanism(s) for return of assignment work, feedback and marks to students: Individual feedback provided by tutorMCE Assignment Brief 2016-17 Page 2 of 4 EN0776/KB7001 Computational Fluid Dynamics and Heat Transfer Assignment PART 1. - Design and validation of a heat sink Problem Statement An electronic component has dimensions of A mm X B mm, and generates heat at a rate of C W (total). A grey cast iron layer E mm is located above the electronic component. A heat sink needs to be designed so that the component temperature remains below 80 0C when the ambient temperature is 30 0C. It has previously been decided that a finned heatsink will be used, as shown in Figure 1. The convective heat transfer rate from the base and fins is D W/m2K. As an engineer assigned this task you are required to design a heatsink that fulfils these requirements. You must develop at least 3 different designs, and evaluate their performance and cost. For at least one design you must investigate how changes in both the fin length and the convective heat transfer coefficient affect the performance of the heatsink. Figure 1. Finned heatsink Design constraints 1. The maximum height of the heatsink is 80 mm. 2. The minimum thickness of any fin is 2 mm 3. The minimum distance between any two fins is 3 mm 4. The thickness of the base is fixed at 5 mm. 5. Material data for copper and aluminium are given at the end. Notes 1. Any assumptions you have made must be stated. 2. Your assignment must be in a design report format and must include (as a minimum) the following sections:  Problem StatementMCE Assignment Brief 2016-17 Page 3 of 4 Design 1 - Description (including diagram) - Analysis - Discussion of Performance . . . (repeat the above for each design) You should select the shape of the fin cross-section for each design at your own discretion.  Parametric Study (Effect of varying convection coefficient (h) and fin length (L) for one of the above designs)  Selected Final Design  Discussion and Conclusion 3. You must apply Gauss-Seidel method to find temperature distribution in the grey cast iron layer. 4. You must include the hand calculations for final-difference analysis and analytical fin analysis for each design. 5. Construct the same geometry for all designs and analyse the temperature distribution and heat transfer rate in the sink using ANSYS. Parameters The parameters A, B, C, D and E depend on your student number, and are assigned as follows. Parameter A B C D E Digit of student No. 4th from the last 3rd from the last 2nd from the last 1st from the last The last digit Digit Value 0 60 60 50 20 10 1 2 65 65 15 3 4 70 70 20 5 80 25 6 75 75 25 7 8 80 80 30 9 Material data Material Price Density Conductivity Copper £ 9.25 per kg 8900 kg/m3 400 W/mK Aluminium £ 2.60 per kg 2700 k/m3 240 W/mKMCE Assignment Brief 2016-17 Page 4 of 4 Marking scheme For this part of the assignment marks will be allocated under the following headings: - Introduction 10% - Computational details 10% - Results and discussion for designs 1, 2 and 3 (15% for each design) 45% - Parametric study 20% - Selected final design, discussion, justification and conclusion 15% Additional instructions to students: This is an individual work. This assignment should be presented in a standard engineering report format. You must include the final-difference analysis and analytical fin analysis with all relevant equations. The report for this assignment must not exceed 15 pages, including appendices. Further Information Learning outcomes tested in this assessment (from the Module Descriptor): 1. Demonstrate a critical understanding of the governing equations and mathematical principles of fluid mechanics and heat transfer employed in CFD software 2. Independently plan a CFD project to solve unknown problems involving thermofluids, considering time and computer resource constraints and demonstrating an awareness of the limitations of CFD methodologies 3. Demonstrate a critical awareness of the current and emerging numerical methods in the field of fluid dynamics and heat transfer 4. Analyse complex engineering flows systematically using CFD software and make judgements based on available data 5. Demonstrate a critical understanding of physical models and their application in CFD software Assessment criteria / marking scheme: As shown on the assignment Referencing style: Harvard (https://www.northumbria.ac.uk/static/5007/llspdf/skills/referencingstyles.pdf) Expected size of the submission: The report for this assignment must not exceed 15 pages, including appendices. Academic integrity statement: You must adhere to the university regulations on academic conduct. Formal inquiry proceedings will be instigated if there is any suspicion of plagiarism or any other form of misconduct in your work. Refer to the University's Assessment Regulations for Northumbria Awards if you are unclear as to the meaning of these terms. The latest copy is available on the University website. Failure to submit: The University requires all students to submit assessed coursework by the deadline stated in the assessment brief. Where coursework is submitted without approval after the published hand-in deadline, penalties will be applied as defined in the University Policy on the Late Submission of Work (available at the link below). https://www.northumbria.ac.uk/static/5007/arpdf/lateappr