The variations of the total integrated work W_all (solid curve) and its gas pressure component W_p (dashed line), the turbulent pressure component W_pt (long dashed line) and the viscosity component W_vis with depth in log P. The normalized radiative flux and ω_rτ_c are also plotted and labelled, where ω_r is the pulsational cyclic frequency, and τ_c is the local inertial time-scale for convection. The panels show (a) the fundamental mode; (b) the second overtone; (c) the fourth overtone; (d) the sixth overtone. The parameters of the stellar model are and This model is just located outside the red edge of the instability strip. This model is labelled with circles in Figs 1 and 2.