What is the type of thermal energy transfer that takes place in fluids mostly?

Convection. EXAMPLES: If you think about a pot of water that is heated on a stove, the stove burner heats the bottom of the pot by conduction. Water touching the bottom of the pot is also heated by conduction. As this water is heated, it expands and becomes less dense than the cooler, denser water that is above it. The cooler, denser water at the top of the pot sinks and pushes the hot, less dense water upward. As the hot, less dense water rises, its particles come in contact with colder water particles, so it gives up heat energy to the lower temperature water particles with which it collides. That is, it cools by conduction. As it cools it "contracts" and becomes denser, causing it to drop toward the bottom of the pot again, forcing the warmer water below it to rise. This movement causes convection currents. These currents transfer thermal energy from warmer to cooler parts of the liquid.|||convection|||transfer of energy in fluid is known as conduction.