(a) Safety factor (q) profile used in simulation. (b) Normalized ion heat diffusivity. For low q, the heat diffusivity decreases around the circumference where q is minimum. (c) Temporal evolution of normalized ion heat flux. For high q, the heat flux is high and oscillates in time due to oscillatory zonal flows. On the other hand, the heat flux is suppressed by stationary zonal flows which strengthen when q is low.