ME7724 Assignment Submission Guidelines

Submission requirements

All assignments must be submitted by the date and time specified above.

Students are required to submit an electronic copy of their completed assignment via the Assignments section of Canvas and follow any specific instructions. Any change to this instruction will be advised via Canvas. In line with Faculty policy for late submission of coursework, any work submitted up to a week late will be capped at 40%. Coursework submitted after this time will receive 0%.

In case of illness or other issues affecting your studies please refer to the University Mitigating Circumstances policy. Guidance on mitigating circumstances can be found on MyKingston:

The following module learning outcomes and professional body learning outcomes are tested in this assessment:

(LO2) Construct appropriate solid models for CFD analysis, setup the solution domain and generate suitable surface and volume grids via meshing tool.

(LO3) Understand both flow physics and mathematical properties of governing Navier-Stokes equations and define appropriate boundary conditions.

(LO4) Use CFD software to model flow problems of relevance to Mechanical Engineers. Analyse the CFD results and compare them with available data.

Assessment task and specific terms

Submission details and requirements:

(1) Please open the solid models in Solidworks and save them in Parasolid format before using in Ansys (as done in some tutorials). Modifications of the original solid model should be done in Ansys using Design Modeller, otherwise modifications could be not compatible with Ansys. Calculations should be performed with fully three-dimensional model. To simplify meshing, you are allowed to introduce a small gap between the wheels and the ground (this way will allow to take into account the ground effect). Kingston University cluster can be used as an option to speed up CFD calculations.

(2) You need to submit an electronic copy of the report in PDF format to Canvas/ME7724 for similarity and plagiarism checks. Please avoid MS Word file submission on Canvas because of some formatting issues with equations. Your work should be first fully word-processed (not handwritten and scanned) and then a copy saved as PDF for Canvas submission. Hardcopy not required. Do not include ANSYS WB files to the Canvas Submission.

(3) You need to upload an archived copy of your ANSYS WB files (.wbpz file) on Box and include the link in an appendix e.g. appendix A in your report.

(4) The maximum word limit for the report is 3000 words. Figures limits are specified in the relevant assignment sections. No other specific format is imposed.

(5) You should refer to the bibliographic sources you use in your assignment. A list of References must be presented at the end of the report listing all bibliographic sources cited, in Harvard style.

Using the standard methodology described in the ME7724 Tutorials sessions on external flow analysis as a guide, import the supplied model into ANSYS Workbench, set up the CFD model, solve it using ANSYS CFX and examine the characteristics of the flow. For the initial analysis, the model should be set up identically to the model investigated during the tutorial sessions except that the choice of the flow domain dimensions and inflation layers are for you to decide. Choose and justify your choice of suitable flow domain and road surface dimensions, set suitable boundary conditions to correctly simulate the van surface and the roadway. In carrying out the modelling you should:

• Check the solid model and save it in a new format (if required).
• Create the flow domain geometry and isolate the fluid region.
• Identify and label the flow domain boundaries.
• Set up the controlling parameters for surface and volume meshing.
• Model the boundary layer using layer inflation.
• Generate Preview Groups showing the mesh on key surfaces.
• Generating the volume mesh.
• Set up the physics of the flow and assign appropriate boundary conditions.
• Set up the initial flow conditions and the solution monitors and controls.
• Solve the model and monitor the solution convergence.
• Create Contour, Streamline and Isosurface plots.
• Assess the quality of the boundary layer modelling from the y+ distribution.
• Use the CFX Function Calculator to determine lift and drag forces and coefficients.

Provide a critical appraisal of the CFD modelling methodology you used for the assignment and discuss how it could be improved upon. Your discussion should include comments on the appropriateness of the turbulence model used and on the quality of the boundary layer modelling achieved.

Note: In assessing your work, credit will be given for well thought out practical solutions showing technical engineering insight and understanding and for clarity ofthought in both interpreting and presenting your results. Your report should be entirely in your own words. There should be no need for you to download large tracts of material from websites. No credit will be given for such material.