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Pictures that shows how bubbles form in a diesel droplet through the interaction of multiple femtosecond laser pulses. The process is documented in a high-speed camera.
By studying how bubbles form in a drop of biodiesel, researchers at the University of Gothenburg can help future engines get the most energy out of the fuel.
In an internal combustion engine, the fuel is distributed in small droplets in injection valves to maximise combustion.
In the engine, the fuel droplets are pressurised to turn into gas and burn. When gas is formed, bubbles form inside the droplets and it is these that the researchers at the University of Gothenburg have studied using femtosecond lasers.
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