BASICS Flashcards
1
Q
What is the TRADITIONAL DESIGN CYCLE?
A
- Design
- prototype
- test
- Satisfied (iteration)
- Mass produce
2
Q
Why use FEA/CFD?
A
- Cheaper and quicker than making multiple prototypes
- Reduces the number of iteration cycles
- Reduces time to the market
- Quicker optimisation of designs
3
Q
What are the 4 stages of the CFD/FEA PROCESS?
A
1) Pre-Processing
2) Solution/Analysis
3) Post-Processing
4) Validation
4
Q
What is covered by the PRE-PROCESSING STAGE?
A
- Define the problem
- Model
- Discretisation
- Assign Physical Properties
- Assign boundary conditions
5
Q
What types of MODELLING ARE THERE? (3)
A
- 3D scanner
- MRI
- CAD software
6
Q
What is the difference between DISCRETISATION OF FEA AND CFD?
A
FEA - Meshing
* Divide the problem domain into elements
CFD - Computational Domain + Meshing
* Define if the area is internal/external
* Divide area/model into “cells”
7
Q
What PHYSICAL PROPERTIES NEED TO BE CONSIDERED IN FEA?
A
- Young’s Modulus
- Friction COefficient
- Linear/non-linear mechanical properties
- Isotropic/Anisotropic
8
Q
What PHYSICAL PROPERTIES NEED TO BE CONSIDERED IN CFD?
A
- Viscosity
- (Non-)Newtonian
- (In)compressible
- Turbulent/Laminar
- Thermal/density effects
9
Q
What are some BOUNDARY CONDITIONS IN FEA?
A
- Fixtures
- Applied Forces
- Friction
10
Q
What are some BOUNDARY CONDITIONS IN CFD?
A
- Inlet velocity
- Outlet velocity
- Flow rate
- Pressure
Ambient Fluid Conditions
