M_h 36 "num of holes along length"
N_h 6 "num of holes along width"
h0 1.6[um] "Gap height"
l_h 15[um] "length of hole (thickness of plate)"
l_pl 370[um] "length of plate"
w_pl 65[um] "width of plate"
s_h 6[um] "Side of square hole"
s_1 w_pl/(N_h+1)-s_h "distance between holes"
s_2 s_1+s_h/2 "distance between hole and edge of plate"
s1p l_pl/(M_h+1)-s_h ""
s2p s1p+s_h/2 ""
pitch__ s_h+s_1 ""
l_per l_pl-2*(s2p-s1p) "length of perforated region"
w_per w_pl-2*(s_2-s_1) "width of perforated region"
r0 sqrt(l_per*w_per/M_h/N_h/pi) "unit disc radius"
ri s_h/sqrt(pi) "equivalent radius of hole"
dhND 0.05 "Fractional gap height change"
dh dhND*h0 "Change in gap height"
mu0 1.8e-5[Pa*s] "Gas viscosity"
f0 10000[Hz] "Vibration frequency"
vf 2*pi*f0*dh "velocity of wall"
pRef 1[atm] ""