Figure 2

Comparison of schematic and real jet formation images. In the sketches, grey arrows indicate expansion or contraction of the vapour and black arrows mark the fluid flow inside the jet. For the time-resolved images hydrogel with the viscosity η = 0.1477 Pa·s was coated in 66 μm layer onto the donor slide. The black scale bars correspond to 200 μm. For images a), b) and d) laser pulse energy of 20 μJ was applied. The delays of the images were a) 1μs, b) 3 μs, c) 100 μs and d) 34 μs. To visualize the small counterjet higher energy levels were necessary. Therefore, applied energy in c) was 60 μJ.