$P$	The concentrated force on a plate at the center of a circle plate, [N].
$r$	The length between any point on the circle plate and the center of a circle plate, [mm].
$a$	The radius of the circle plate, [mm].
$A$	The maximum displacement of the piezoelectric vibrator, [mm].
$K$	The peak-to peak displacement at the center, [mm].
$L$	The stroke length, [mm].
$L_0$	The stroke length of the whole cycle of a synthetic jet, [mm].
$\overline{U_0}$	The average velocity scale for the synthetic jet, [L/s].
$d_0$	The jet hole diameter of synthetic jet actuator, [mm].
$S_t$	Strouhal number
$\omega$	The radian frequency of vibrator, [1/s].
$v$	Kinematic viscosity of the fluid, [${\mathrm{m}}^2/\mathrm{s}$].
$C$	Jet formation constant
T	One cycle period of a synthetic jet, [s]
$Re$	Reynolds number
$S$	Stokes number
$\dot{Q_0}$	The instantaneous mass flow rate in orifice area, [kg/s].
$u_0$	The instantaneous velocity at the jet hole, [L/s].
$d_c$	The diameter of piezoelectric vibrator, [mm].
$h$	Heat transfer coefficient, $\mathrm{W}/\left({\mathrm{m}}^2·°\mathrm{C}\right).$
$Q$	Heat Power, [$\mathrm{W}$].
$A$	radiating surface, [${\mathrm{m}}^2]$.
$T_{avg}$	The average surface temperature of the heat resource, [$°\mathrm{C}$].
$T_e$	Environment temperature, [$°\mathrm{C}$].