BASICS

Question 1

What is the TRADITIONAL DESIGN CYCLE?

Answer 1

• Design
• prototype
• test
• Satisfied (iteration)
• Mass produce

Question 2

Why use FEA/CFD?

Answer 2

• Cheaper and quicker than making multiple prototypes
• Reduces the number of iteration cycles
• Reduces time to the market
• Quicker optimisation of designs

Question 3

What are the 4 stages of the CFD/FEA PROCESS?

Answer 3

1) Pre-Processing
2) Solution/Analysis
3) Post-Processing
4) Validation

Question 4

What is covered by the PRE-PROCESSING STAGE?

Answer 4

• Define the problem
• Model
• Discretisation
• Assign Physical Properties
• Assign boundary conditions

Question 5

What types of MODELLING ARE THERE? (3)

Answer 5

• 3D scanner
• MRI
• CAD software

Question 6

What is the difference between DISCRETISATION OF FEA AND CFD?

Answer 6

FEA - Meshing
* Divide the problem domain into elements
CFD - Computational Domain + Meshing
* Define if the area is internal/external
* Divide area/model into “cells”

Question 7

What PHYSICAL PROPERTIES NEED TO BE CONSIDERED IN FEA?

Answer 7

• Young’s Modulus
• Friction COefficient
• Linear/non-linear mechanical properties
• Isotropic/Anisotropic

Question 8

What PHYSICAL PROPERTIES NEED TO BE CONSIDERED IN CFD?

Answer 8

• Viscosity
• (Non-)Newtonian
• (In)compressible
• Turbulent/Laminar
• Thermal/density effects

Question 9

What are some BOUNDARY CONDITIONS IN FEA?

Answer 9

• Fixtures
• Applied Forces
• Friction

Question 10

What are some BOUNDARY CONDITIONS IN CFD?

Answer 10

• Inlet velocity
• Outlet velocity
• Flow rate
• Pressure
  Ambient Fluid Conditions