Microscopic gas implosions from cavitation generate extreme sheer force in liquids




If high intensity low-pressure is produced through the fast movements of objects in liquids, cavities filled with gas form in the liquid, which then implode. This process produces in situ temperatures of several 100 degrees Celsius and a pressure of more than 1000 bar. Moreover, the collapse of the gas bubble produces microjets with speeds reaching several hundred km/h, which allow the extreme sheer force to emerge in the immediate surroundings.





collapsing gas bubble



                Unwelcome cavitation on a ship propeller


                  Result: damage to the propellers