Annulus
Model description
Profile described by two concentric circles with radii $r_1$ and $r_2$ ($r_1>r_2$).
Cross-section area:
$$A=\pi\cdot\left(r_1^2-r_2^2\right)$$
Gap height:
$$h=2\cdot\left(r_1-r_2\right)$$
Profile perimeter:
$$l_P=2\cdot\pi\cdot\left(r_1+r_2\right)$$
Parameters
Parameter | Symbol | Unit | Description |
Radius2 | \(r_2\) | m | Inner radius |
Radius1 | \(r_1\) | m | Outer radius |