31. The bubbles made by cavitation collapse forming tiny jets directed at the surface. 32. Therefore, it is well worth plants'while to avoid cavitation occurring. 33. Another case where two-phase flow can occur is in pump cavitation . 34. Blockage of the filter will cause cavitation and possibly failure of the pump. 35. The principal noise problem with a screw is cavitation . 36. Upon irradiation with high intensity sound or ultrasound, acoustic cavitation usually occurs. 37. If so, perhaps air was trapped inside triggering cavitation in the impeller. 38. Cavitation is much less of problem in trees with ring-diffuse wood.39. Cavitation on the stoss side increases this pressure gradient, which assists flow.40. The propellers have a characteristic RPM band in which no cavitation noise arises.
