Spatial and Temporal Discretization Flashcards
1
Q
What are the three fundamentals of CFD?
A
- Navier Stokes Equations
- Finite Volume Methods
- Spatial and Temporal Discretization
2
Q
What three important Pre-Processing Concepts?
A
- Boundary Conditions
- Mesh Generation
- Turbulence Models
3
Q
What are two important Post Processing Concepts?
A
- Visualization
- Analysis
4
Q
What is Method of Lines and what are its benifits?
A
- Separate discretization in space and time
- Largest flexibility
- Each term can be treated differently to yield different accuracies
5
Q
What are the three properties of central differencing?
A
- The variation between centroids is linear
- Second rate accurate
- Unbounded
6
Q
What is Upwind differenceing?
A
- Depends on direction of mass flux
- First order accurate
- Bounded
- Diffusive
7
Q
What is linear upwind differencing?
A
- We use gradient to improve accuracy of extrapolation
- Second order accurate
- Unbounded
8
Q
What is the function of a flux limiter?
A
- To resolve all physical problems as precisely as possible
- To suppress any numerical oscillations
9
Q
What is total variation diminishing?
A
Is a measure of how a function changes across grid values
10
Q
What are two level methods for temporal discretization?
A
- Forward Euler
- Backward Euler
- Crank Nickelson
