Hairpin vortices resemble the horseshoe vortex, which exists because of perturbations of small upward motion due to differences in upward flowing velocities depending on the distance from the wall. These form multiple packets of hairpin vortices, where hairpin packets of different sizes could generate new vortices to add to the packet. Specifically, close to the surface, the tail ends of hairpin vortices could gradually converge resulting in provoked eruptions, producing new hairpin vortices. Hence, such eruptions are a regenerative process, in which they act to create vortices near the surface and eject them out onto the outer regions of the turbulent wall. Based on the eruptive properties, such flows can be inferred to be very efficient at heat transfer because of mixing. Specifically, eruptions carry hot fluids up while cooler flows are brought downwards during the converging of tails of the hairpin vortices before erupting.