# 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
$\pi$

Default
3.141592653589793

Used in
$A_{ab}$
$A_c$
$A_{comp}$
$A_d$
$A_{d,fill}$
$A_e$
$A_{encl}$
$A_{er}$
$A_{hsi}$
$A_{hsj}$
$A_{hsp}$
$A_i$
$A_{it}$
$A_{prot}$
$A_{scb}$
$A_{scs}$
$A_{shj}$
$A_{skid}$
$A_{sp}$
$A_t$
$A_{tape}$
$\beta_X$
$C_b$
$D_e$
$D_{eq}$
$D_f$
$d_x$
$\delta_{ar}$
$\Delta \theta_{0x,h}$
$\Delta \theta_{e,t}$
$\Delta \theta_{kp}$
$\Delta \theta_{kp,t}$
$\Delta \theta_{uh}$
$Do_t$
$F_{\alpha}$
$G$
$g_{dry}$
$GMR_c$
$H_1$
$H_2$
$h_{ground}$
$h_t$
$H_x$
$H_y$
$I_c$
$I_{EMF}$
$L_1$
$L_2$
$L_3$
$\omega$
$\phi_{ar}$
$Q_{it1}$
$Q_{it2}$
$r_b$
$T_1$
$T_2$
$T_{4d}$
$T_{4db}$
$T_{4i}$
$T_{4ii}$
$T_{4iii}$
$T_{4pii}$
$T_{4piii}$
$T_{4ss}$
$T_{4w}$
$T_{4y}$
$T_{ab}$
$T_{at}$
$T_{conv,ce}$
$T_{cs}$
$T_{ct}$
$T_{dsh}$
$T_e$
$T_{hsi}$
$T_{hsj}$
$T_{hsp}$
$T_i$
$T_{ins}$
$T_{is}$
$T_{prot}$
$T_{riser}$
$T_{sa}$
$T_{scb}$
$T_{scs}$
$T_{shj}$
$T_{st}$
$T_{tw}$
$T_{wall}$
$\tau_{ar}$
$\theta_{gas}$
$U_{partially}$
$U_{wall}$
OHTC of pipe wall [W/(K.m$^2$)]
$V_{comp}$
Gas volume [m$^3$]
$W_{conv,ce}$
$W_{conv,da}$
$W_{conv,gd}$
$W_{conv,od}$
$W_{conv,og}$
$W_{conv,sa}$
$W_{de}$
$W_{rad,ce}$
$W_{rad,da}$
$W_{rad,sa}$
$X_0$
$X_{ar}$
$X_c$
$X_{S1}$
Reactance section 1 [$\Omega$/m]
$X_{S2}$
Reactance section 2 [$\Omega$/m]
$X_{S3}$
Reactance section 3 [$\Omega$/m]
$z_{ar,i}$
$z_{ar,m}$
$z_{ar,o}$
$z_{e2}$
$z_{earth}$
$z_{os}$
$z_{sc,i}$
$z_{sc,m}$
$z_{sc,o}$
$z_{sc,sh}$
$z_{sh,i}$
$z_{sh,m}$
$z_{sh,o}$