Dh 2*width_channel*height_channel/(width_channel+height_channel) "Hydraulic diameter"
dp aveop1(p) "Pressure drop"
Tw aveop2(T) "Average wall temperature"
Omega spf.out1.Mflow/rho_f*dp "Pumping power"
h_mchs q_in/(Tw-T_in) "Heat transfer coefficient"
Nu h_mchs*Dh/k_f "Nusselt number"
Re rho_f*u_in*Dh/mu_f "Reynolds number"