When bubbles form in overheated fuel and prevent fuel flow it is called?

When bubbles form in overheated fuel, preventing fuel flow, it is called "cavitation." This phenomenon occurs when the pressure of the fuel drops below its vapor pressure, causing it to vaporize and form bubbles. These bubbles can disrupt fuel flow and lead to engine performance issues or damage if not addressed. Proper cooling and fuel management are essential to prevent cavitation in fuel systems.