List of symbols

Symbol	Name of the symbol	Unit
$C_b$	coefficient $ C_b $	$\mathrm{ }$
$C_{th}$	coefficient $ C_{th} $	$\mathrm{ }$
$d$	diameter	$\mathrm{mm}$
$d_1$	diameter $ d_1 $	$\mathrm{mm}$
$d_2$	diameter $ d_2 $	$\mathrm{mm}$
$d_o$	diameter of orifice	$\mathrm{mm}$
$f$	friction factor	$\mathrm{ }$
$l$	length	$\mathrm{mm}$
$r$	radius	$\mathrm{mm}$
$t$	thickness	$\mathrm{mm}$
$β$	diameter ratio	$\mathrm{ }$
$ζ$	loss coefficient	$\mathrm{ }$
$λ$	jet contraction ratio	$\mathrm{ }$
$μ$	discharge coefficient	$\mathrm{ }$
$ψ$	angle	$\mathrm{°}$