# Archimedes' constant $\pi$

The constant $\pi$ represents the area of the unit circle, the half-period of trigonometric functions, and many other things in mathematics.

Symbol
$\pi$
Formulae
$3.141592653589793$
Used in
$A_{a_{1}}$
$A_{a_{2}}$
$A_{ab_{1}}$
$A_{ab_{2}}$
$A_{c}$
$A_{comp}$
$A_{d}$
$A_{d_{fill}}$
$A_{encl}$
$A_{fluid}$
$A_{ins}$
$A_{pipe}$
$A_{prot}$
$A_{scb}$
$A_{scs}$
$A_{t}$
$\beta_{a_{1}}$
$\beta_{a_{2}}$
$\beta_{X}$
$C_{b}$
$d_{x}$
$\delta _{ar}$
$\Delta \theta_{0x_{h}}$
$\Delta \theta_{e_{t}}$
$\Delta \theta_{kp}$
$Do_{t}$
$F_{a_{1}}$
$F_{a_{2}}$
$\gamma_{a}$
$H_{1_{1}}$
$H_{1_{2}}$
$H_{2_{1}}$
$H_{2_{2}}$
$h_{ground}$
$H_{x}$
$H_{y}$
$I_{c}$
$I_{EMF}$
$L_{1}$
$L_{2}$
$L_{3}$
$\omega$
$Q_{i1}$
$Q_{i2}$
$r_{b}$
$T_{1}$
$T_{1t}$
$T_{2_{1}}$
$T_{2_{2}}$
$T_{2_{f}}$
$T_{4d}$
$T_{4db}$
$T_{4i}$
$T_{4ii}$
$T_{4iii}$
$T_{4w}$
$T_{4y}$
$T_{at}$
$T_{conv_{ce}}$
$T_{e}$
$T_{ins}$
$T_{prot}$
$T_{sa}$
$T_{st}$
$T_{tr}$
$T_{tw}$
$T_{wall}$
$\theta_{gas}$
Gas temperature [$^{\circ}$C]
$U_{partially}$
$U_{wall}$
OHTC of pipe wall [W/(K.m$^2$)]
$V_{comp}$
Gas volume [m$^3$]
$W_{conv_{ce}}$
$W_{conv_{sa}}$
$W_{rad_{ce}}$
$W_{rad_{ext}}$
$W_{rad_{int}}$
$W_{rad_{sa}}$
$W_{tube}$
$X_{0}$
$X_{c}$
$X_{S1}$
Reactance section 1 [$\Omega$/m]
$X_{S2}$
Reactance section 2 [$\Omega$/m]
$X_{S3}$
Reactance section 3 [$\Omega$/m]