u_p -k_p*px[Pa] Flow-velocity pressure term, x component v_p -k_p*py[Pa] Flow-velocity pressure term, y component U_p sqrt(u_p^2+v_p^2) Flow velocity pressure term, magnitude u_eo k_V*Vx[V] Flow-velocity electroosmosis term, x component v_eo k_V*Vy[V] Flow-velocity electroosmosis term, y component U_eo sqrt(u_eo^2+v_eo^2) Flow-velocity electroosmosis term, magnitude u_flow u_p+u_eo Flow velocity, x component v_flow v_p+v_eo Flow velocity, y component U_flow sqrt(u_flow^2+v_flow^2) Flow velocity, magnitude c_init 1[mmol/m^3]*exp(-0.5*((x-x_m)/sigma)^2) Initial concentration distribution