Boundary Conditions Flashcards
1
Q
Why are boundary conditions needed?
A
At system boundary, constraints must be applied to flow variable
2
Q
What are two requirements for boundary conditions?
A
- Reflect physical conditions of case being simulated
- Compatible across sets of multiple equations and flow regimes
3
Q
What are the two types of boundary conditions?
A
Dirichlet/ Fixed Value
Neumann/ Fixed Gradient
4
Q
What are ghost/dummy cells?
A
Additional Layer of virtual grid cells outside of simulated physical domain
5
Q
What is the purpose of dummy cells?
A
To be dummy thic.
To simplify computation by allowing us to employ the same discretization scheme at the boundaries as inside the physical domain
6
Q
What are common wall boundary conditions?
A
- No-slip condition
- Specified velocity
- No movement normal to wall
