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

ParameterSymbolUnitDescription
Radius2\(r_2\)mInner radius
Radius1\(r_1\)mOuter radius